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  1. Quarto ventrículo isolado: relato de dois casos

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    SILVA JOSÉ ALBERTO GONÇALVES DA

    1998-01-01

    Full Text Available São descritos dois casos de quarto ventrículo isolado sendo o primeiro decorrente de hemorragia cerebelar e o segundo de hidrocefalia congênita com múltiplas revisões de válvula e cisto de Dandy-Walker. O tratamento cirúrgico é revisado na literatura. A abordagem direta à fossa posterior acha-se indicada nos casos de cisto no interior do quarto ventrículo. Naqueles sem a presença de cisto, deve-se empregar sistema de drenagem do quarto ventrículo, independente da drenagem supratentorial.

  2. Quiste coloide del tercer ventrículo

    OpenAIRE

    Juan Dávila Meneses

    2012-01-01

    Los quistes coloides son lesiones intracraneales con una incidencia calculada en tres individuos por millón de personas en un año. Son tumores benignos de la porción anterosuperior del tercer ventrículo. El flujo normal del líquido cefalorraquídeo puede ser interrumpido por un gran quiste que obstruya el foramen de Monro. Los signos y síntomas asociados engloban un espectro amplio de características, desde una cefalea no específica hasta datos de hipertensión intracraneal; algunos quistes col...

  3. Una causa poco frecuente de hipertrabeculación exclusiva del ventrículo derecho: ventrículo derecho no compacto

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    Juan C Díaz

    2013-08-01

    Full Text Available La cardiopatía por falta de compactación ventricular es una entidad infrecuente, que generalmente compromete el ventrículo izquierdo ocasionando falla cardíaca, arritmias ventriculares, embolismo periférico y muerte súbita. Hasta el momento, se han descrito muy pocos casos de ventrículo derecho no compacto, por lo cual no hay criterios diagnósticos establecidos y se desconoce como es la evolución clínica y la respuesta al tratamiento de este grupo de pacientes. Se describe el caso de un paciente con hipertrabeculación marcada del ventrículo derecho en quien se descartó un origen estructural de la misma, haciéndose diagnóstico de ventrículo derecho no compacto.

  4. Una causa poco frecuente de hipertrabeculación exclusiva del ventrículo derecho: ventrículo derecho no compacto

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    Juan C. Díaz, MD

    2013-07-01

    Full Text Available La cardiopatía por falta de compactación ventricular es una entidad infrecuente, que generalmente compromete el ventrículo izquierdo ocasionando falla cardíaca, arritmias ventriculares, embolismo periférico y muerte súbita. Hasta el momento, se han descrito muy pocos casos de ventrículo derecho no compacto, por lo cual no hay criterios diagnósticos establecidos y se desconoce como es la evolución clínica y la respuesta al tratamiento de este grupo de pacientes. Se describe el caso de un paciente con hipertrabeculación marcada del ventrículo derecho en quien se descartó un origen estructural de la misma, haciéndose diagnóstico de ventrículo derecho no compacto.

  5. Gros temps

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    Jean Marie Théodat

    2008-10-01

    Full Text Available Ce sixième cahier paraît à un moment où « l’immense orgue des vents grondeurs » cher à Baudelaire fait rage dans les finances du pays le plus puissant de la planète. Les turbulences provoquées par l’explosion de la bulle financière américaine entraînent un déséquilibre mondial qui va demander des réajustements structurels et profonds dans le modèle de développement du pays le plus riche. Les fondements même de l’économie libérale se trouvent ébranlés dans le pays qui en a fait son credo et so...

  6. Infarto del ventrículo derecho Right ventricular infarction

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    Alberto Barón C

    Full Text Available Por lo general, el infarto del ventrículo derecho se asocia con infarto de la pared inferior del ventrículo izquierdo. La enfermedad pulmonar obstructiva crónica y la hipertrofia del ventrículo derecho, son factores que lo predisponen. Casi siempre ocurre como consecuencia de obstrucción proximal de la arteria coronaria derecha que conduce a disfunción sistólica y diastólica del ventrículo derecho. El volumen latido disminuye y el volumen diastólico y la presión de llenado del ventrículo derecho aumentan, con lo que se ocasiona hipotensión y congestión periférica. Se disminuyen el flujo sanguíneo pulmonar y el retorno venoso para el ventrículo izquierdo que puede llevar a estado de choque. Además, se pueden presentar complicaciones como bloqueo aurículo-ventricular, disfunción sinusal y aneurisma ventricular. El electrocardiograma muestra supradesnivel del ST en las derivaciones III, V1 a V3 y en V4R. El ecocardiograma muestra hipoquinesia o aquinesia de la pared libre del ventrículo derecho y hay dilatación de las cavidades derechas e insuficiencia tricúspide. El Doppler demuestra aumento en la duración de los intervalos de contracción y relajación isovolumétrica; el período eyectivo se acorta y el índice de desempeño miocárdico aumenta a valores anormales. El Doppler tisular es anormal por la disminución de la velocidad sistólica del anillo tricúspide. Una parte importante del tratamiento es optimizar el ritmo y la frecuencia cardiaca por lo que se debe evitar el uso de beta-bloqueadores; dependiendo de la severidad de la bradicardia se puede usar atropina, aminofilina o marcapasos transitorio, con la finalidad de asegurar una frecuencia adecuada. En caso de fibrilación auricular se pueden usar antiarrítmicos o cardioversión eléctrica. Se debe asegurar un adecuado volumen de llenado, para mantener la presión venosa central mayor de 15 mm Hg. El uso de vasodilatadores o diuréticos está contraindicado. Es

  7. Discipline and credibility in the post-war australopithecine controversy: Le Gros Clark versus Zuckerman.

    Science.gov (United States)

    Richmond, Jesse

    2012-01-01

    Paleoanthropologists and outside commentators have often remarked upon the apparent difficulty of securing shared belief among experts in the science of human evolution. The field has been and continues to be particularly prone to disagreement and even controversy among its practitioners to a degree that sets it apart from other areas of scientific inquiry. The fact that the field lies at the intersection of a number of disciplines may help to explain this predicament. Displays of discipline serve as an important resource for scientists as they work to secure credibility. Where a field of inquiry spans a host of disciplinary approaches, there can be disagreement about the kind of disciplined behavior appropriate to making credible claims about that field's subject matter. A conflict of this sort emerged after WW II over the claim that the australopithecines of South Africa represented a likely ancestral link in the evolution of human beings. W. E. Le Gros Clark, working in the established disciplinary tradition of comparative anatomy, endorsed the claim of ancestry, while Solly Zuckerman, reflecting his recent immersion in war-time operations research, criticized that claim on the grounds that it came without the rigorous quantitative demonstration that he felt was the hallmark of a properly disciplined science.

  8. Quiste coloide del tercer ventrículo

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    Juan Dávila Meneses

    2012-09-01

    Full Text Available Los quistes coloides son lesiones intracraneales con una incidencia calculada en tres individuos por millón de personas en un año. Son tumores benignos de la porción anterosuperior del tercer ventrículo. El flujo normal del líquido cefalorraquídeo puede ser interrumpido por un gran quiste que obstruya el foramen de Monro. Los signos y síntomas asociados engloban un espectro amplio de características, desde una cefalea no específica hasta datos de hipertensión intracraneal; algunos quistes coloides se dan en el comienzo agudo de una hidrocefalia y pueden llevar a una muerte súbita. Caso: presentamos el caso de un adolescente masculino de 13 años de edad, de raza negra, quien dos días antes de su fallecimiento había manifestado cefalea. Al examen de autopsia se evidenció un quiste coloide del tercer ventrículo que produjo una hidrocefalia aguda obstructiva, con edema cerebral severo y herniación de amígdalas cerebelosas. En este artículo comentamos las características principales del quiste coloide y realizamos una breve revisión bibliográficaColloid cysts are intracranial lesions with an estimated incidence of three individuals per million people per year. They are benign tumors of the anterior portion of the third ventricle. The normal flow of cerebrospinal fluid may be interrupted by a large cyst obstructing the foramen of Monro. The signs and symptoms associated cover a wide range of features, from a non-specific headaches to intracranial hypertension data, some colloid cysts occur in the acute onset of hydrocephalus and can lead to sudden death. Case: We present the case of an adolescent male 13 years of age, black race, who two days before his death had expressed headache. On examination autopsy showed a third ventricular colloid cyst that caused acute obstructive hydrocephalus with severe cerebral edema and herniation of cerebellar tonsils. In this article we discuss the main features of the colloid cyst and performed

  9. Falso seudoaneurisma del ventrículo izquierdo

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    Silvio Acevedo

    2007-01-01

    Full Text Available El ventrículo izquierdo puede presentar abultamientos patológicos, que se denominan aneurisma, seudoaneurisma o divertículo. Los aneurismas son los más frecuentes y su etiología más común es la enfermedad coronaria.Presentamos un paciente de 16 años, derivado al Hospital Escuela de Corrientes con diagnóstico de accidente cerebrovascular. Por eco-Doppler color, resonancia magnética y cinecoronariografía se diagnosticó seudoaneurisma ventricular izquierdo. El examen histológico demostró la presencia de fibras musculares cardíacas, por lo que se concluyó que se trataba de un aneurisma ventricular izquierdo. Esta discordancia entre el diagnóstico por imágenes y la anatomía patológica fue descripta por Mackenzie con el nombre de falso seudoaneurisma.

  10. Doble salida de ventrículo derecho: Enfoque embriológico

    OpenAIRE

    Muñoz-Castellanos, Luis; Kuri,Magdalena

    2012-01-01

    Objetivo: Se presenta una explicación patogenética sobre la morfogénesis de la doble salida de ventrículo derecho que explica su origen. Método: Se describieron 35 corazones con doble salida de ventrículo derecho, 15 con grandes arterias ligeramente cruzadas, 10 con arterias lado a lado y 10 con aorta anterior y pulmonar posterior. Se comparó el plano de separación de las vías de salida y de las grandes arterias en los 3 tipos de esta cardiopatía, con el plano de la tabicación troncoconal nor...

  11. Boundary|Time|Surface: Art and Geology Meet in Gros Morne National Park, NL, Canada

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    Lancaster, Sydney; Waldron, John

    2015-04-01

    Environmental Art works range in scope from major permanent interventions in the landscape to less intrusive, more ephemeral site-specific installations constructed of materials from the local environment. Despite this range of intervention, however, these works all share in a tradition of art making that situates the artwork in direct response to the surrounding landscape. Andy Goldsworthy and Richard Long, for example, both favour methods that combine elements of both sculpture and performance in the creation of non-permanent interventions in the landscape, and both rely upon photographic, text-based, or video documentation as the only lasting indication of the works' existence. Similarly, Earth Scientists are responsible for interventions in the landscape, both physical and conceptual. For example, in Earth science, the periods of the geologic timescale - Cambrian, Ordovician, Silurian, etc. - were established by 19th century pioneers of geology at a time when they were believed to represent natural chapters in Earth history. Since the mid-20th century, stratigraphers have attempted to resolve ambiguities in the original definitions by defining stratotypes: sections of continuously deposited strata where a single horizon is chosen as a boundary. One such international stratotype, marking the Cambrian-Ordovician boundary, is defined at Green Point in Gros Morne National Park, Newfoundland. Boundary|Time|Surface was an ephemeral sculptural installation work constructed in June 2014. The main installation work was a fence of 52 vertical driftwood poles, 2-3 m tall, positioned precisely along the boundary stratotype horizon at Green Point in Newfoundland. The fence extended across a 150 m wave-cut platform from sea cliffs to the low-water mark, separating Ordovician from Cambrian strata. The installation was constructed by hand (with volunteer assistance) on June 22, as the wave-cut platform was exposed by the falling tide. During the remainder of the tidal cycle

  12. Glioma cordoide do terceiro ventrículo: descrição de um novo caso

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    Patrícia Sanches

    2012-10-01

    Full Text Available O glioma cordoide é um tumor cerebral raro, recentemente descrito, localizado na região do terceiro ventrículo e com características histológicas, imuno-histoquímicas e ultraestruturais peculiares. Este estudo ilustra um caso de glioma cordoide do terceiro ventrículo em uma paciente de 59 anos de idade.

  13. Our experience with implantation of VentrAssist left ventricular assist device

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    Hiriyur Shivalingappa Jayanthkumar

    2013-01-01

    Full Text Available Perioperative anaesthetic management of the VentrAssist TM left ventricular assist device (LVAD is a challenge for anaesthesiologists because patients presenting for this operation have long-standing cardiac failure and often have associated hepatic and renal impairment, which may significantly alter the pharmacokinetics of administered drugs and render the patients coagulopathic. The VentrAssist is implanted by midline sternotomy. A brief period of cardiopulmonary bypass (CPB for apical cannulation of left ventricle is needed. The centrifugal pump, which produces non-pulsatile, continuous flow, is positioned in the left sub-diaphragmatic pocket. This LVAD is preload dependent and afterload sensitive. Transoesophageal echocardiography is an essential tool to rule out contraindications and to ensure proper inflow cannula position, and following the implantation of LVAD, to ensure right ventricular (RV function. The anaesthesiologist should be prepared to manage cardiac decompensation and acute desaturation before initiation of CPB, as well as RV failure and severe coagulopathic bleeding after CPB. Three patients had undergone implantation of VentrAssist in our hospital. This pump provides flow of 5 l/min depending on preload, afterload and pump speed. All the patients were discharged after an average of 30 days. There was no perioperative mortality.

  14. Cirugía de tipo uno y medioventricular en la doble salida del ventrículo izquierdo

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    Luis Marcano Sanz

    2012-03-01

    Full Text Available La doble salida del ventrículo izquierdo es muy poco frecuente, en la cual la aorta y la arteria pulmonar, emergen completa o predominantemente del ventrículo izquierdo. Cuando se acompañan de comunicación interventricular y de estenosis pulmonar la corrección se realiza usualmente con interposición de un conducto entre el ventrículo derecho y la arteria pulmonar. El objetivo del presente trabajo es presentar un caso tratado con cirugía de tipo uno y medio ventricular, pues, hasta donde conocemos, esta técnica no ha sido empleada en esta enfermedad para evitar el uso de conductos protésicos. Se reporta en una niña de 3 años de edad, a quien se le cerró la comunicación interventricular, se desconectó la arteria pulmonar del ventrículo izquierdo y se anastomosó al nuevo tracto de salida del ventrículo derecho, y se realizó derivación cavopulmonar parcial. Después de 6 años de seguimiento presenta buena evolución clínica, ecocardiográfica y capacidad funcional adecuada.

  15. Aneurisma do seio de Valsalva esquerdo englobando a parede anterior do ventrículo direito

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    Brito,João de Deus e; Cláudio Roberto C. Assumpção; Antonio de Pádua Jazbik; Darteson Gutierrez; Brito,Paulo Henrique T. de; Dany David Kruczan

    2006-01-01

    Relatamos o caso de um homem de 36 anos, portador de aneurisma do seio de Valsalva esquerdo que englobou a parede anterior do ventrículo direito. Apresentava, também, importante insuficiência da valva aórtica. O diagnóstico foi realizado por meio do ecocardiograma transtorácico e cateterismo cardíaco. O paciente foi submetido a tratamento cirúrgico que consistiu em fechamento do orifício aneurismático com placa de pericárdio bovino. Procedida a reconstrução plástica da valva aórtica, conforme...

  16. Cisto aracnóide do terceiro ventrículo: relato de dois casos

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    Wander Miguel Tamburus

    1987-09-01

    Full Text Available Foram atendidos no Departamento de Neurocirurgia da Universidade de Berlim, nos anos de 1985 e de 1986, dois casos de cisto aracnóide do terceiro ventrículo, ambos submetidos com sucesso a tratamento cirúrgico. São eles registrados neste artigo. Os cistos aracnóides do sistema ventricular e das cisternas são raros. Até o momento tinham sido registrados 46 casos na literatura. A tomografia axial computadorizada e a tomografia de ressonância magnética tornaram fácil o diagnóstico desta entidade, como se verifica nos casos registrados.

  17. Taquicardia ventricular del tracto de salida del ventrículo derecho durante el embarazo

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    Ariel K. Saad

    2012-06-01

    Full Text Available Durante el embarazo aumentan el metabolismo basal, el consumo de O2, la frecuencia cardíaca, el volumen sistólico, el volumen minuto y la volemia y disminuyen la tensión arterial y la resistencia periférica. Diferentes estudios han demostrado que durante este período la posibilidad de que ocurra una arritmia cardíaca o se produzca la exacerbación de una arritmia preexistente es mayor. No obstante, en su enorme mayoría carecen de importancia pronóstica tanto para la madre como para el feto. La taquicardia ventricular del tracto de salida del ventrículo derecho es una arritmia poco frecuente y su aparición se ha correlacionado con el aumento del tono adrenérgico. Se presentan los casos de dos pacientes que mostraron en el curso de la gestación reiterados episodios de taquicardia ventricular del tracto de salida del ventrículo derecho. Se analiza la asociación del embarazo con la ocurrencia de trastornos del ritmo cardíaco.

  18. Complicações infecciosas da ventrículo-auriculostomia

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    Gilberto M. Almeida

    1966-09-01

    Full Text Available De 184 pacientes submetidos à ventrículo-auriculostomia com a válvula de Holter, 39 apresentaram complicações infecciosas. Em 18 casos ficou demonstrada a existência de ependimite e/ou meningite e em 21 instalou-se o quadro da bacteremia. Apesar das complicações, a ventrículo-auriculostomia continua a ser a técnica cirúrgica mais usada no tratamento da hidrocefalia. Com melhor seleção dos casos, excluindo-se doentes com meningite recente ou com fistula liquórica, os resultados poderão ser melhores. Ainda não se conseguiu método seguro para abolir a contaminação operatória. Nos casos em que existe ependimite deve-se iniciar tratamento antibiótico intensivo, seguido de retirada do sistema de drenagem. Nos doentes com bacteremia apenas, a remoção da válvula e cateteres dependerá da gravidade do caso e da resposta ao tratamento com antibióticos e corticosteróides, podendo ser adiada por algum tempo. Quando a infecção é causada por germe reconhecidamente patogênico há maior gravidade, devendo-se retirar precocemente o sistema de drenagem.

  19. Implantation of the VentrAssist Implantable Rotary Blood Pump in sheep.

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    James, Natalie L; van der Meer, Anita L; Edwards, Glenn A; Snelling, Samuel R; Begg, John D; Esmore, Donald S; Woodard, John C

    2003-01-01

    The VentrAssist Implantable Rotary Blood Pump (IRBP) is a hydrodynamically suspended, electromagnetically driven, centrifugal blood pump that provides continuous flow of up to 10 L/min at 3,000 rpm. In vivo studies in sheep were conducted to assess system design and performance. Surgery involved thoracotomy with subdiaphragmatic pump placement. Cannulae were transdiaphragmatic, with inflow in the left ventricular apex and outflow anastomosed to the descending aorta. Animals had no anticoagulation or antiplatelet therapy after surgery and no prophylactic antibiotics after recovery. Twelve sheep were supported for 622 pump days. Estimated pump flow ranged from 1 to 5.5 L/min at 1,800 to 2,000 rpm using 2.5 to 4.5 W. There was no clinical evidence of hemolysis or cardiovascular, renal, or hepatic dysfunction. Adverse outcomes included kinking/disconnection of the outflow cannula caused by the graft bend relief (n = 4), which was addressed through cannula redesign. Pump electrical malfunction (n = 4), caused by a silicone potting compound, was corrected using a neutral curing potting material. Surgical/husbandry issues (n = 2) also were addressed. The VentrAssist IRBP provides high flow at low rotational speed and power consumption. Further trials are in progress in advance of in vivo studies of the safety and efficacy of the final system.

  20. Caracterización de harina y almidón de frutos de banano Gros Michel (Musa acuminata AAA

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    Jairo Montoya-López

    2015-01-01

    Full Text Available En el estudio se determinaron las características fisicoquímicas, térmicas y reológicas de la harina y el almidón de frutos de banano Gros Michel (Musa acuminata cosechado en fincas del departamento del Quindío, Colombia. En el análisis proximal, la harina presentó un contenido de fibra de 18.82% y el almidón presentó contenidos de proteína de 1.92%, grasa de 5.3% y fibra de 2.76%. La harina presentó la temperatura más alta de absorción de calor (68.88 °C y su entalpía de gelatinización fue de 2.17 J/g; mientras que para el almidón estos valores fueron de 48.36 °C y 44.62 J/g, respectivamente. El análisis termogravimétrico (TGA de la harina o temperaturas en las cuales se registra la descomposición de carbohidratos (componentes de bajo peso molecular y polisacáridos (componentes de alto peso molecular fueron, respectivamente, de 284.51 °C y 470.42 °C; y para el almidón fueron de 307.51 °C y 500.46 °C. Los gránulos de almidón de banano tienen forma elipsoidal con un tamaño longitudinal promedio de 39.39 µm y tamaño transversal promedio de 29.47 µm. Los difractogramas de rayos X mostraron patrones de difracción tipo B. Los viscoamilogramas mostraron que para la harina la temperatura de inicio de gelatinización (Tg es de 76.3 °C, la viscosidad máxima de 1120 cP, y para el almidón la Tg fue de 70.75 °C y la viscosidad máxima de 2087 cP.

  1. A dança e o ventre: aparência corporal na contemporaneidade

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    Kussunoki, Sandra Aparecida Queiroz [UNESP

    2010-01-01

    A dança do ventre tem sua origem em rituais religiosos pré-suméricos, e foi utilizada pelos povos da Antiguidade em diversos tipos de celebração. Como dança da fertilidade, era praticada pelas mulheres, em rituais, na época do plantio e colheita e na preparação para a gestação e o parto, entre outros. Sofreu diversas transformações pelo tempo, e atualmente é praticada quase no mundo inteiro. Até os tempos atuais, continua sendo utilizada como preparação para o parto em tribos beduínas e recen...

  2. Um sistema de ventrículo pulmonar produzindo pressão pulsátil em único ventrículo: modelo experimental A pulmonary ventricle system producing pulsatile pressure in single ventricle: experimental model

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    Bilgein Emrecan

    2006-09-01

    Full Text Available OBJETIVO: Pacientes com ventrículo único funcional têm prognóstico ruim, que resulta em insuficiência cardíaca, mesmo após tratamento cirúrgico. As operações derivação cavo-pulmonar (exceto pelas conexões do átrio direito ao ventrículo direito não apresentam sistema ventricular pulmonar com pressão pulsátil, além do fluxo reduzido ao ventrículo único. Para resolver o problema, tentamos criar um ventrículo pulmonar que produza pressão pulsátil experimentalmente. MÉTODO: Tentamos criar um sistema ventricular direito que produzisse pressão pulsátil. O modelo experimental foi realizado em seis ovelhas. As pressões do ventrículo pulmonar criado, da artéria pulmonar e do ventrículo esquerdo foram medidas após a saída da circulação extracorpórea. RESULTADOS: A média das pressões arteriais pulmonares sistólica e diastólica foi 15,6 ± 2,0 mmHg e 4,5 ± 1,5 mmHg. A média da pressão sistólica ventricular esquerda foi 76,6 ± 4,4 mmHg. CONCLUSÃO: Um ventrículo que produza pressão pulsátil é necessário para a regulação do fluxo da artéria pulmonar, com pressão venosa central e pressão pulmonar não pulsátil nas anomalias como ventrículos únicos funcionais.OBJECTIVE: Patients with functional single ventricle show bad survey, most of which result in cardiac failure even in the case that they are operated. The right heart bypass operations except for right atrium and right ventricle connections lack pulsatile pulmonary ventricle system besides the volume lack coming to the common ventricle. To solve the problem, we tried to create a pulmonary ventricle which produces pulsatile pressure experimentally. METHODS: We tried to form a right ventricle system which produces pulsatile pressure. The experimental model was carried on six sheep. The pressures of the created pulmonary ventricle, pulmonary artery and the left ventricle were measured after leaving the cardiopulmonary bypass. RESULTS: The mean of the

  3. Modificação do método de Bielschowsky-Gros para cortes em parafina

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    José Fernandez

    1958-03-01

    Full Text Available É proposta uma modificação para o método de Bielschowsky-Gros a ser aplicado em cortes em parafina, utilizável no estudo de terminações nervosas centrais e periféricas. O método é de manipulação fácil e executável em poucas horas, ao contrário da grande maioria de métodos de impregnação em cortes de parafina. A impregnação é precedida de preparador e de mordente e seguida por viragem em ouro. O preparador utilizado é a solução de formol a 2% neutralizada com carbonato de magnésio, adicionada ou não a sonifeno a 1% O emprêgo do sonifeno tem a vantagem de permtir impregnar mais vigorosamente as fibras e terminações nervosas e evitar ao máximo a impregnação das fibras conjuntivas, oferecendo perfeita limpeza da preparação. O mordente é constituído por uma solução recente de nitrato de prata a 10% na qual os cortes permanecem por tempo variável, sendo aconselhável, para a coloração do plexo simpático fundamental, permanência prolongada (cêrca de uma hora. A impregnação é feita em solução de óxido de prata amoniacal preparada como o recomenda Bielchowsky (solução de nitrato de prata a 10% acrescida de amoníaco até completa dissolução do precipitado formado, podendo ser substituída, com idênticos resultados, pelas soluções propostas por Rio-Hortega, Foot, Arteta e Jabonero. A viragem em ouro é feita utilizando a solução aconselhada por Castro (uma gota de ácido acético para cada 10ml de solução de cloreto de ouro amarelo a 1/600. Os resultados obtidos com o método proposto são satisfatórios. Conseguiu-se impregnar com perfeição neurônios do gânglio de Gasser; nas preparações com sonifeno, as fibras nervosas e os prolongamentos celulares apareciam perfeitamente impregnados e a preparação oferecia limpeza absoluta. No apêndice cecal as terminações nervosas resultavam perfeitamente impregnadas, contrastando, principalmente quando foi empregado o sonifeno, com os elementos

  4. Fisiopatología del ventrículo derecho Right ventricle pathophysiology

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    IVÁN CAVIEDES S

    2009-01-01

    Full Text Available El ventrículo derecho (VD ha sido tradicionalmente poco valorado, al concentrarse la investigación y el tratamiento de la patología cardíaca en el comportamiento del ventrículo izquierdo (VI. Desde antiguo se suponía que la importancia funcional del VD era secundaria y poco determinante. En el ámbito de las Enfermedades Respiratorias, el concepto de falla cardíaca derecha derivada de patología pulmonar o corazón pulmonar, ha estado siempre vigente, sin embargo, la limitación para efectuar las técnicas de estudio cardíaco, mantuvo distante la información disponible sobre el VD. En los últimos cinco años, ha habido un renovado interés en incrementar el conocimiento sobre el VD, produciéndose cambios significativos en lo conceptual, en los métodos de estudio y en las proyecciones de tratamiento. En este artículo revisaremos conceptos fisiopatológicos recientes, basados en publicaciones actualizadas sobre los mecanismos y patologías que comprometen el VD. Esta cavidad es marcadamente diferente del VI, tanto en su origen, como en su anatomía, función y capacidad de recuperación. Es tributario de la circulación pulmonar y dependiente de la patología respiratoria, la que es capaz de dañarlo. Además, la precarga del ventrículo izquierdo es de su dependencia, convirtiéndolo en un componente importante de su patología y de su capacidad de respuesta.Right ventricle has traditionally been underemphasized considering the amount of information and investigation about the left ventricle, its pathologies and treatments. Old physiological concepts considered right ventricle as a secondary organ without significance in cardiovascular pathology. The scope of respiratory diseases usually deals with heart involvement or cor pulmonale secondary to pulmonary diseases. Nevertheless, the limited availability of cardiac techniques to evaluate right ventricle has restricted the information about its physiological behavior and diseases. In

  5. Ventrículo único en un paciente de 5 meses, reporte de un caso

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    Milenka Soliz Panozo

    2010-12-01

    Full Text Available Las cardiopatías congénitas tienen una incidencia de aproximadamente 1 de cada 100 recién nacidos. Alrededor de la mitad de los niños afectados mueren durante el primer año de vida si no se trata. El corazón univentricular es una de ellas, que se caracteriza por la presencia de solo una cavidad ventricular. El 80% de los pacientes,desde el punto de vista morfológico, presentan un ventrículo único semejante a la cavidad ventricular izquierda, separada de una cavidad infundibular de salida por un tabique bulboventricular. En esta anomalía la sangre venosa sistémica y pulmonar se mezcla en la cámara ventricular, dando como resultado la hipoxia general del paciente e insuficiencia cardíaca. Presentamos el caso clínico, de un infante de 6 meses de edad con presencia de esta cardiopatía y otras patologías asociadas a esta malformación congénita.

  6. Impeller behavior and displacement of the VentrAssist implantable rotary blood pump.

    Science.gov (United States)

    Chung, Michael K H; Zhang, Nong; Tansley, Geoff D; Woodard, John C

    2004-03-01

    The VentrAssist implantable rotary blood pump, intended for long-term ventricular assist, is under development and is currently being tested for its rotor-dynamic stability. The pump is of the centrifugal type and consists of a shaftless impeller, also acting as the rotor of the brushless DC motor. The impeller remains passively suspended in the pump cavity by hydrodynamic forces, resulting from the small clearances between the impeller outside surfaces and the pump cavity. In the older version of the pump tested, these small clearances range from approximately 50 microm to 230 microm; the displacement of the impeller relative to the pump cavity is unknown in use. This article presents two experiments: the first measured displacement of the impeller using eddy-current proximity sensors and laser proximity sensors. The second experiment used Hall-effect proximity sensors to measure the displacement of the impeller relative to the pump cavity. All transducers were calibrated prior to commencement of the experiments. Voltage output from the transducers was converted into impeller movement in five degrees of freedom (x, y, z, theta(x), and theta(y)). The sixth degree of freedom, the rotation about the impeller axis (theta(z)), was determined by the commutation performed by the motor controller. The impeller displacement was found to be within the acceptable range of 8 micro m to 222 microm, avoiding blood damage and contact between the impeller and cavity walls. Thus the impeller was hydrodynamically suspended within the pump cavity and results were typical of centrifugal pump behavior. This research will be the basis for further investigation into the stiffness and damping coefficient of the pump's hydrodynamic bearing.

  7. Experimental determination of dynamic characteristics of the VentrAssist implantable rotary blood pump.

    Science.gov (United States)

    Chung, Michael K H; Zhang, Nong; Tansley, Geoff D; Qian, Yi

    2004-12-01

    The VentrAssist implantable rotary blood pump, intended for long-term ventricular assist, is under development and is currently being tested for its rotor-dynamic stability. The pump consists of a shaftless impeller, which also acts as the rotor of the brushless DC motor. The impeller remains passively suspended in the pump cavity by hydrodynamic forces, which result from the small clearances between the outside surfaces of the impeller and the pump cavity. These small clearances range from approximately 50 microm to 230 microm in size in the version of pump reported here. This article presents experimental investigation into the dynamic characteristics of the impeller-bearing-pump housing system of the rotary blood pump for increasing pump speeds at different flow rates. The pump was mounted on a suspension system consisting of a platform and springs, where the natural frequency and damping ratio for the suspension system were determined. Real-time measurements of the impeller's displacement were performed using Hall effect sensors. A vertical disturbance force was exerted onto the pump housing, causing the impeller to be displaced in vertical direction from its dynamic equilibrium position within the pump cavity. The impeller displacement was represented by a decaying sine wave, which indicated the impeller restoring to its equilibrium position. From the decaying sine wave the natural frequency and stiffness coefficient of the system were determined. Furthermore, the logarithmic decrement method was used to determine the damping ratio and eventually the damping coefficient of the system. Results indicate that stiffness and damping coefficients increased as flow rate and pump speed increased, representing an increase in stability with these changing conditions. However, pump speed had a greater influence on the stiffness and damping coefficients than flow rate did, which was evident through dynamic analysis. Overall the experimental method presented in this

  8. Tumor da região do terceiro ventrículo diagnóstico eletrencefalográfico

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    Paulino W. Longo

    1948-06-01

    Full Text Available Depois de rápidas considerações sobre as dificuldades do diagnóstico topográfico dos tumores da região do terceiro ventrículo e sobre as aquisições recentes da eletrencefalografia nesse sentido, os AA. apresentam a observação de uma paciente de 36 anos de idade, com história de 4 meses, portadora de uma síndrome de hipertensão intracraniana grave, acompanhada de hemiparesia esquerda muito discreta e alterações psíquicas. O exame do liqüido cefalorraquidiano revelou hipertensão e a eletrencefalografia evidenciou alterações difusas e bilaterais, ao lado de surtos persistentes e repetidos de ritmo teta, simétrica e sincronicamente reproduzidos, em áreas centrais e parietais de ambos os hemisférios, bem como ondas de ritmo delta focal, no lobo frontal direito, com típicas figuras de reversão. Os primeiros foram atribuídos ao edema cerebral e à hipertensão intracraniana, enquanto que estas (as ondas de ritmo teta acompanhadas de ritmo delta focal frontal direito foram interpretadas como dependentes de tumor cerebral profundamente situado, mediano, da região do terceiro ventrículo, comprometendo secundariamente o lobo frontal direito. A ventriculografia, em parte, e a intervenção cirúrgica subseqüente, confirmaram o diagnóstico, revelando a existência de um tumor cístico pediculado, que, da sela turca invadia o terceiro ventrículo e a parte profunda do lobo frontal direito (craniofaringioma.

  9. River

    Directory of Open Access Journals (Sweden)

    Morel Mathieu

    2016-01-01

    Full Text Available The OECD report “Boosting Resilience through Innovative Risk Governance” examines the efforts of OECD countries to prevent or reduce future disaster impacts, and highlights several key areas where improvements can be made. International collaboration is insufficiently utilised to address shocks that have increasingly global consequences. Institutional design plays a significant role in facilitating or hampering the engagement and investments of governmental and non-governmental stakeholders in disaster risk prevention and mitigation. To inform the design of “better” institutions, the OECD proposes the application of a diagnostic framework that helps governments identify institutional shortcomings and take actions to improve them. The goal of the case study on the Rhone River is to conduct an analysis of the progress, achievements and existing challenges in designing and implementing disaster risk reduction strategies through the Rhone Plan from a comparative perspective across a set of selected countries of this study, like Austria and Switzerland, will inform how to improve institutional frameworks governing risk prevention and mitigation. The case study will be used to identify examples of successful practice taking into account their specific country contexts, and analyse their potential for policy transfer.

  10. Pseudoaneurisma crônico do ventrículo esquerdo de etiologia indeterminada Pseudoaneurisma crónico del ventrículo izquierdo de etiología indeterminada Chronic left ventricular pseudoaneurism of undetermined etiology

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    Guilherme Loureiro Fialho

    2010-01-01

    Full Text Available Os pseudoaneurismas ocorrem como rara complicação do infarto do miocárdio, após rotura miocárdica, cujo processo hemorrágico é contido por aderências do pericárdio visceral, parietal - ou de ambos -, impedindo o desenvolvimento de tamponamento cardíaco. Relatamos o caso de um paciente de 55 anos, com pseudoaneurisma crônico do ventrículo esquerdo de etiologia indefinida, de longa evolução, que foi submetido a tratamento conservador.Los pseudoaneurismas ocurren como rara complicación del infarto de miocardio, tras rotura miocárdica, con detención del proceso hemorrágico por las adherencias del pericardio visceral, parietal - o de ambos -, impidiendo el desarrollo de taponamiento cardiaco. Relatamos el caso de un paciente de 55 años, con pseudoaneurisma crónico del ventrículo izquierdo de etiología indefinida, de larga evolución, que se sometió a tratamiento conservador.Pseudoaneurysms occur as a rare complication of the myocardial infarction, of which hemorrhagic process is contained by adherences of the visceral or parietal pericardium - or of both - preventing the development of cardiac tamponade. We report the case of a 55-year-old patient, with a chronic left ventricular pseudoaneurysm of undetermined etiology, who was submitted to a conservative treatment.

  11. Estudo comparativo do anel valvar mitral e do ventrículo esquerdo na cardiomiopatia dilatada

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    HUEB Alexandre Ciappina

    2001-01-01

    Full Text Available OBJETIVO: O objetivo deste trabalho foi analisar o comportamento do anel valvar mitral e do ventrículo esquerdo na cardiomiopatia dilatada (CMD. MATERIAL E MÉTODOS: Analisaram-se 68 corações humanos adultos, fixados, sendo 48 portadores de CMD de etiologia isquêmica ou idiopática, e 20 corações sem cardiopatia. Obteve-se imagens digitalizadas do perímetro do anel mitral, inserção da cúspide anterior e posterior e da porção fibrosa e muscular. Obteve-se também o perímetro interno do VE, distância do septo ao músculo papilar anterior e posterior, distância entre os músculos papilares, e extensão do septo interventricular. RESULTADOS: A análise dos resultados demonstrou proporcionalidade, tanto da porção fibrosa (r²= 0.98, quanto da porção muscular (r²= 0.99 do anel em relação ao grau de dilatação da valva mitral. A regressão linear revelou que o perímetro de inserção das cúspides anterior (r²= 0.96 e posterior (r² =0.98 também guardam relação de proporcionalidade. Observou-se que a dilatação do VE ocorre de forma global e esférica em seus segmentos. Não se observou relação de proporcionalidade entre o grau de dilatação do anel mitral e do VE. CONCLUSÃO: Ao contrário do que se pensava, na CMD de etiologia isquêmica ou idiopática, a dilatação do anel mitral ocorre de forma proporcional e não apenas na sua porção posterior. Não é o grau de dilatação do VE que determina o grau de dilatação do anel mitral pois eles ocorrem de forma independente. Estas observações abrem novas perspectivas para as técnicas de correção da insuficiência valvar mitral na CMD.

  12. Rotura de la pared libre del ventrículo izquierdo secundaria a infarto agudo de miocardio

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    Claudio Solís

    2009-01-01

    Full Text Available RESUMENAunque la terapia trombolítica y la angioplastia primaria han cambiado radicalmente elmanejo, la evolución y el pronóstico del infarto agudo de miocardio, la rotura de la paredlibre del ventrículo izquierdo todavía implica una tasa elevada de mortalidad.Si bien la mayoría de los pacientes con esta complicación presentan un cuadro agudo ycatastrófico, que se caracteriza por taponamiento cardíaco, disociación electromecánica ymuerte en pocos minutos, aproximadamente un tercio de ellos tienen una evolución subagudacon hipotensión sostenida y diversos grados de derrame pericárdico, lo que posibilita laimplementación de medidas terapéuticas necesarias como puente al tratamiento quirúrgicoresolutivo.En este trabajo se presenta una revisión actualizada de las características clínicas yecocardiográficas de los pacientes con rotura de la pared libre del ventrículo izquierdo asociadacon infarto agudo de miocardio, con el objetivo de destacar los puntos clave del diagnóstico e incrementar la sospecha clínica de una entidad grave, no siempre fatal.REV ARGENT CARDIOL 2009;77:395-404.

  13. One and a half ventricular repair as an alternative for hypoplastic right ventricle Operação de um ventrículo e meio como uma alternativa para o ventrículo direito hipoplásico

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    Miguel Angel Maluf

    2010-12-01

    Full Text Available OBJECTIVE: Patients with complex congenital heart disease, characterized by right ventricle hypoplasia, had a palliative surgical option with one and a half ventricular repair. METHODS: From July 2001 to March 2009, nine patients (mean age 5.2 years, range 3 to 9 years with hypoplastic right ventricle, underwent correction with one and a half ventricle technique. Preoperative diagnoses included: pulmonary atresia with intact ventricular septum, in six and Ebstein's anomaly, in three cases. Six patients had bidirectional cavo-pulmonary shunt (Glenn operation previously. The surgical approach was performed with cardiopulmonary bypass to correct intracardiac defects: atrial septal defect closure (nine cases; right ventricle outlet tract reconstruction with porcine pulmonary prosthesis (seven cases; tricuspid valvuloplasty (three cases. RESULTS: There was one (11.1% hospital death. All the patients left the hospital in good clinical conditions. One patient presented pulmonary stenosis at distal prosthesis anastomosis and needed surgical correction. There was one (12.5% late deaths after reoperation. At mean follow-up of 39.8 months (range 16 months to 8.4 years seven patients are alive in functional class I (NYHA. CONCLUSIONS: Surgical treatment of congenital cardiac anomalies in the presence of a hypoplastic right ventricle by means of one and a half ventricle repair has the advantages of reducing the surgical risk of biventricular repair compared to the Fontan circulation; it maintains a low right atrium pressure, a pulsatile pulmonary blood flow and improves the systemic oxygen saturation with short and medium-term promising results. Longer follow-up is needed to prove the efficacy of such a repair in the long term.OBJETIVO: Pacientes com cardiopatia congênita complexa e caracterizada por hipoplasia do ventrículo direito têm uma opção de correção paliativa com a operação de um ventrículo e meio. MÉTODOS: De julho de 2001 a março de

  14. A Influência da Dança do Ventre nos sintomas depressivos em idosas da comunidade.

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    Bruna Perez Broadbent Hoyer

    2015-05-01

    Full Text Available Estudo do tipo ensaio clínico randomizado “cego” que avaliou a influência da dança do ventre (DV nos sintomas depressivos em idosas da comunidade, sendo estas divididas em dois grupos: I-controle e II-intervenção; avaliadas antes (T0 e após (TI a intervenção com DV. Utilizamos Escala Geriátrica de Depressão de Yesavage abreviada (EDG-15, sendo observada uma melhora significativa (p=0,019  apenas no grupo II na EDG-15 em relação a T0 (média: 6,45; DP=3,26 e T1 (Média: 3,33; DP=1,51.  

  15. Miocardiopatia preponderante de ventrículo direito por miocardite prévia ou por displasia arritmogênica?

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    Atik Edmar

    2005-01-01

    Full Text Available É relatado o caso clínico de um paciente do sexo masculino com 10 anos de idade, cuja miocardiopatia dilatada e preponderante de ventrículo direito apresenta dificuldades diagnósticas entre a etiologia de miocardite prévia e a displasia arritmogênica. Como os elementos não são patognomônicos de uma ou de outra causa, a elevação de enzimas cardíacas na fase subaguda talvez incline para a suposição de miocardite prévia. Daí, o questionamento de que muitos casos rotulados como displasia arritmogênica poderem, verdadeiramente, corresponder à possibilidade de miocardite evolutiva. A controvertida conduta clínica é discutida.

  16. Endoscopic approach to fourth ventricle cysticercosis Tratamento endoscópico da cisticercose do quarto ventrículo

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    Samuel Tau Zymberg

    2003-06-01

    Full Text Available Neurocysticercosis is the most frequently observed parasitosis of the central nervous system worldwide. The fourth ventricle is the most frequent site of intraventricular infestation, a location that carries a higher risk for CSF blockage and intracranial hypertension due to CSF blockage. A great number of patients become shunt dependent which carries a poorer prognosis. We report on a case of a patient with symptomatic obstructive hydrocephalus due to cysticercus in the fourth ventricle where an endoscopic approach via a frontal burr hole was performed. Although there is no consensus in the literature for the optimal treatment of this disease, this method seemed adequate for treatment of fourth ventricle cysticercosis in patients with hydrocephalus, aqueductal and foramen of Monro dilatations.A neurocisticercose é a parasitose mais freqüentemente encontrada no sistema nervoso central. O quarto ventrículo é o local mais frequente de infestação intraventricular, uma localização que acarreta grande risco de bloqueio da circulação liquórica e subseqüente hipertensão intracraniana. Grande número de pacientes se torna dependente de derivações liquóricas, o que determina pior prognóstico. Relatamos o caso de um paciente com quadro de hidrocefalia obstrutiva secundária a cisticerco localizado no quarto ventrículo que foi abordado por via endoscópica. Apesar de, até o momento, não haver consenso na literatura sobre o melhor tratamento da neurocisticercose intraventricular, o tratamento neuroendoscópico parece ser método eficaz de tratamento nos pacientes com hidrocefalia e dilatação dos forames de Monro e do aqueduto.

  17. Geology of Paleozoic Rocks in the Upper Colorado River Basin in Arizona, Colorado, New Mexico, Utah, and Wyoming, Excluding the San Juan Basin

    Science.gov (United States)

    Geldon, Arthur L.

    2003-01-01

    The geology of the Paleozoic rocks in the Upper Colorado River Basin in Arizona, Colorado, New Mexico, Utah, and Wyoming, was studied as part of the U.S. Geological Survey's Regional Aquifer-System Analysis Program to provide support for hydrogeological interpretations. The study area is segmented by numerous uplifts and basins caused by folding and faulting that have recurred repeatedly from Precambrian to Cenozoic time. Paleozoic rocks in the study area are 0-18,000 feet thick. They are underlain by Precambrian igneous, metamorphic, and sedimentary rocks and are overlain in most of the area by Triassic formations composed mostly of shale. The overlying Mesozoic and Tertiary rocks are 0-27,000 feet thick. All Paleozoic systems except the Silurian are represented in the region. The Paleozoic rocks are divisible into 11 hydrogeologic units. The basal hydrogeologic unit consisting of Paleozoic rocks, the Flathead aquifer, predominantly is composed of Lower to Upper Cambrian sandstone and quartzite. The aquifer is 0-800 feet thick and is overlain gradationally to unconformably by formations of Cambrian to Mississippian age. The Gros Ventre confining unit consists of Middle to Upper Cambrian shale with subordinate carbonate rocks and sandstone. The confining unit is 0-1,100 feet thick and is overlain gradationally to unconformably by formations of Cambrian to Mississippian age. The Bighom aquifer consists of Middle Cambrian to Upper Ordovician limestone and dolomite with subordinate shale and sandstone. The aquifer is 0-3,000 feet thick and is overlain unconformably by Devonian and Mississipplan rocks. The Elbert-Parting confining unit consists of Lower Devonian to Lower Mississippian limestone, dolomite, sandstone, quartzite, shale, and anhydrite. It is 0-700 feet thick and is overlain conformably to unconformably by Upper Devonian and Mississippian rocks. The Madison aquifer consists of two zones of distinctly different lithology. The lower (Redwall-Leadville) zone

  18. Ressenya a Sònia Gros, «Aquella dolçor amarga». La tradició amatòria clàssica en el Curial e Güelfa. València, Publicacions de la Universitat de València, 2015, 346 pp. ISBN: 978-84-370-9648-3

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    Adrià Martí i Badia

    2015-12-01

    Full Text Available Review to Sònia Gros, «Aquella dolçor amarga». La tradició amatòria clàssica en el Curial e Güelfa. València, Publicacions de laUniversitat de València, 2015, 346 pp, ISBN: 978-84-370-9648-3

  19. 3. Germain Gros.pmd

    African Journals Online (AJOL)

    daouda.thiam

    2009-12-02

    Dec 2, 2009 ... Chinese Economic Success and Policy. Lessons for .... Revolution – rather than the creation of new institutions. ..... Chinese economic policy is largely ... as Malaysia and Singapore, states 'intervene actively in the economy in.

  20. Morfologia do ventrículo esquerdo em adolescentes: comparação entre atletas e não atletas

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    Joaquim Castanheira

    2014-12-01

    Full Text Available Introdução: A morfologia do ventrículo esquerdo altera-se com o crescimento e desenvolvimento, durante a infância e adolescência. Contudo, são escassos os estudos comparativos entre não atletas e jovens atletas de elite. Objetivo: Analisar possíveis diferenças na morfologia do ventrículo esquerdo entre jovens atletas de elite e não atletas, do sexo masculino. Métodos: Trinta atletas de elite (15,4±0,6 anos; 68,0±11,3 kg; 175,2±7,5 cm e 28 adolescentes saudáveis sem experiência com a prática esportiva (15,2±1,3 anos; 62,9± 3,8 kg; 168,8±7,7 cm foram submetidos a medidas antropométricas (estatura, massa corporal e espessura de dobras cutâneas e avaliações ecocardiográficas. Resultados: Diferenças estatisticamente significantes foram encontradas nos diâmetros telediastólico e telesistólico do ventrículo esquerdo, na espessura do septo interventricular em diástole, na espessura da parede posterior do ventrículo esquerdo, no diâmetro do átrio esquerdo e na relação entre o diâmetro do átrio esquerdo e o diâmetro da raiz da aorta, com os jovens atletas de elite apresentando valores superiores aos não atletas (P<0,01, mesmo após ajuste pela estatura. Correlações positivas e de moderada magnitude entre a massa do ventrículo esquerdo e a estatura foram encontradas em atletas (r=0,57 e não atletas (r=0,40. Conclusão: Os resultados do presente estudo sugerem que os valores superiores nas medidas da cavidade e de espessura da parede ventricular esquerda, encontrados no coração de jovens atletas de elite não podem ser explicados pela maior estatura, destacando a importância da exploração de modelos alométricos simples e multiplicativos que integrem medidas de maturação biológica em futuras investigações.

  1. Fístula coronariana para ventrículo esquerdo: diagnóstico por tomografia computadorizada

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    Roberto Moreno Mendonça

    2011-10-01

    Full Text Available Fístulas de artérias coronárias são raras, sendo diagnosticadas mais frequentemente pelo ecocardiograma ou pela cineangiocoronariografia, entretanto, a angiotomografia computadorizada (angio-TC das coronárias ganha espaço. Essa patologia apresenta incidência baixíssima, sendo as fístulas originadas da coronária direita mais frequentes. Fístulas coronarianas para câmaras cardíacas direitas são mais incidentes, sendo raras para o ventrículo esquerdo (VE. O tratamento pode ser cirúrgico ou percutâneo. Este relato descreve caso de fístula coronariana para VE diagnosticada pela angio-TC das coronárias em homem de 46 anos, hipertenso, assintomático com teste ergométrico positivo para isquemia. Angio-TC de coronárias descartou doença obstrutiva, porém revelou fístula coronariana conectando-se com cavidade ventricular esquerda.

  2. Eletrodo de marca-passo mal posicionado no ventrículo esquerdo Electrodo de marcapasos mal posicionado en el ventrículo izquierdo Pacemaker electrode misplaced in the left ventricle

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    André Luiz Cerqueira de Almeida

    2010-09-01

    Full Text Available Relatamos caso de implantação anômala de eletrodo de marca-passo VVI no ventrículo esquerdo (VE, diagnosticada durante avaliação de rotina, dois anos pós-implante. Trata-se de mulher de 65 anos e soropositiva para doença de Chagas. O eletrocardiograma (ECG apresentava padrão de bloqueio do ramo direito. A radiografia de tórax em perfil mostrou trajeto com curvatura posterior do eletrodo. No ecocardiograma transtorácico, o diagnóstico final mostrou cateter que penetrava o átrio direito, atravessava o septo interatrial e descia pelo átrio esquerdo e orifício valvar mitral para se implantar na parede lateral do VE. Abordam-se os seguintes aspectos relacionados: possíveis trajetos de implantação, quadro clínico, radiológico, eletrocardiográfico, ecocardiográfico, complicações e opções terapêuticas.Relatamos caso de implantación anómala de electrodo de marcapasos VVI en el ventrículo izquierdo (VI, diagnosticada durante evaluación de rutina, dos años post implante. Se trata de mujer de 65 años y seropositiva para enfermedad de Chagas. El electrocardiograma (ECG presentaba estándar de bloqueo de rama derecha. La radiografía de tórax de perfil mostró trayecto con curvatura posterior del electrodo. En el ecocardiograma transtorácico, el diagnóstico final mostró catéter que penetraba el atrio derecho, atravesaba el septo interatrial y descendía por el atrio izquierdo y orificio valvar mitral para implantarse en la pared lateral del VI. Se abordan los siguientes aspectos relacionados: posibles trayectos de implantación, cuadro clínico, radiológico, electrocardiográfico, ecocardiográfico, complicaciones y opciones terapéuticas.This study reports the case of an anomalous implantation of VVI pacemaker electrode in the left ventricle (LV diagnosed during routine evaluation, two years after implantation. The patient is a 65-year-old woman with Chagas disease. Electrocardiogram (ECG revealed a pattern of right

  3. Aneurismectomia do ventrículo esquerdo: avaliação tardia Left ventricular aneurysmectomy: late follow-up

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    José Luiz Dancini

    1996-03-01

    Full Text Available Com o objetivo de avaliar tardiamente o efeito da aneurismectomia do ventrículo esquerdo quanto a sintomatologia e função ventricular global, foram analisados 40 pacientes consecutivos operados de agosto/87 a novembro/94, com um período de seguimento de 12 a 99 meses. A localização mais comum foi a ântero-medial e a maioria dos pacientes apresentava um quadro misto de angina e ICC. A pd2VE média preoperatoria foi de 25,9 mmHg. Cinco (12,5% faleceram durante a internação, por insuficiência miocárdica aguda e 6 (15%, durante o pós-operatório tardio. Quando se divide a série em dois grupos, aqueles operados de 1991 a 1994 (últimos 22 pacientes mostram uma sobrevida de 91% ao final de 4 anos. Dos 29 sobreviventes, 12 (30% encontram-se assintomáticos, enquanto que 42,5% cursam com algum grau de angina ou ICC. O ecocardiograma bidimensional demonstrou normalização dos diâmetros ventriculares, das frações de ejeção e encurtamento em apenas 43% dos casos. Ao final de um ano, somente 50% dos pacientes estão livres de sintomas. Em conclusão, a aneurismectomia do ventrículo esquerdo promoveu melhora sintomática na maioria dos pacientes, com mortalidade aceitável, embora não totalmente confirmada pelos índices de função global ao ecocardiograma bidimensional.Forty consecutive patients operated on between August 1987 and November 1994 were analysed, aiming at the late assessment of left ventricular aneurysmectomy in terms of symptomatology and global ventricular function. The follow-up ranged from 12 to 99 months. The most common location was anteromedial and most of the patients had both angina and CHF. The average preoperative LVEDP was 25.9 mmHg. Five patients (12.5% died during hospitalization, due to acute myocardial failure, and 6 (15% during the late postoperative period. When the series is divided into two groups, the survival rate among those operated on between 1991 and 1994 (the last 22 patients is 91 % after 4

  4. Tratamento cirúrgico dos aneurismas de ventrículo esquerdo e isquemia coronária

    Directory of Open Access Journals (Sweden)

    Danton R. da Rocha LOURES

    1997-04-01

    Full Text Available Desde os primeiros relatos sobre aneurismectomia do ventrículo esquerdo, vários aspectos foram estabelecidos. Existem controvérsias relacionadas à técnica ideal de reconstrução ventricular, seus efeitos na morfolofia, função ventricular, estado sintomático pós-operatório e sobrevida a longo prazo. Este estudo visa levantar a casuística do Serviço, observando as principais indicações e tratamento cirúrgico, o estado sintomático pré e pós-operatório e a sobrevida imediata e tardia dos pacientes. Foram avaliados 12 portadores de aneurisma do ventrículo esquerdo, 9 masculinos, idade média de 60 anos, cujas principais indicações cirúrgicas foram angina (58% e angina + insuficiência cardíaca (42%. O cateterismo cardíaco demonstrou acinesia/discinesia segmentar em 92% dos pacientes, aneurisma apical ou ântero-apical em 83% e doença coronária obstrutiva em 100%, acometendo 3 ou mais vasos em 75%; a artéria interventricular anterior foi mais comprometida (29%. A fração de ejeção variou de 32% a 66% e o encurtamento percentual de 15% a 36%. Todos foram submetidos a revascularização do miocárdio, 9 sofreram aneurismectomia do ventrículo esquerdo, 7 com sutura linear e 2 com reconstrução geométrica. O tempo médio de circulação extracorpórea e clampeamento aórtico foi 96 e 50 minutos para sutura linear e 180 e 86 para reconstrução geométrica. As principais intercorrências pós-operatórias foram síndrome de baixo débito cardíaco e fibrilação atrial (16%. A mortalidade hospitalar foi de 16%. Os pacientes encontram-se com seguimento médio de 15 meses, sobrevida geral de 75%; estão livres de angina 89%, aqueles operados por ICC estão em classe II. Esses fatores melhorando a qualidade de vida justificam a aneurismectomia.Since the first reports about left ventricular aneurysmectomy, many features have been established, but there are controversies concerning the ideal technique of left ventricular

  5. Cisto coloide no terceiro ventrículo e morte súbita em jovem Colloid cyst in the third ventricle and sudden death in young man

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    Angela Augusta Ferreira de Alencar

    2010-12-01

    Full Text Available Morte súbita de jovem, sexo masculino, 23 anos, assintomático, suscitou verificação de óbito. Antes queixou-se de cefaleia excruciante, em sala de aula, caindo sobre o computador. Encéfalo apresentou edema e congestão vascular. Sem herniações. Cortes coronais evidenciaram dilatação dos ventrículos laterais e nódulo aderido ao teto do terceiro ventrículo. À microscopia o diagnóstico foi cisto coloide do terceiro ventrículo. A ameaça de morte súbita em portadores de cisto coloide é sério problema diagnóstico na emergência médica. A relevância deste caso está em lembrar aos médicos que esta entidade deve permanecer como diagnóstico diferencial nas cefaleias em crianças, adolescentes e adultos jovens.Sudden death of 23 year-old asymptomatic male patient led to further investigation into its cause. Previously, he had complained of excruciating headache in the classroom, falling on the computer. His brain showed edema and vascular congestion without herniation. Coronal sections showed dilatation of the lateral ventricles and nodule attached to the roof of the third ventricle. The microscopic diagnosis was colloid cyst of third ventricle. The threat of sudden death among colloid cyst patients is a serious diagnostic problem in medical emergencies. The relevance of this case is to remind doctors that this entity should remain as differential diagnosis in headaches among children, adolescents and young adults.

  6. Modificaciones del patrón fibrilatorio ventricular por el estiramiento regional del ventrículo izquierdo: estudio en corazón aislado de conejo.

    OpenAIRE

    Trapero Gimeno, Isabel

    2006-01-01

    RESUMEN Introducción: Se parte de la hipótesis de que las modificaciones locales de las propiedades electrofisiológicas, si se circunscriben a zonas de extensión limitada, deben causar escasos cambios en el proceso global de activación durante la fibrilación ventricular (FV). Para comprobarlo, se produce un estiramiento local del miocardio, en la pared libre del ventrículo izquierdo, y se analizan diversos parámetros electrofisiológicos, tanto en situación de ritmo sinusal como durante la ...

  7. Estudio de la organización celular y capacidad proliferativa en el tercer ventrículo de mamíferos adultos.

    OpenAIRE

    Durán Moreno, María

    2016-01-01

    Los tanicitos son células epiteliales que tapizan el tercer ventrículo del cerebro y envían un proceso basal hacia los núcleos neuronales hipotalámicos implicados en la regulación de diversas funciones endocrinas. Ese proceso basal le confiere apariencia de glía radial, célula de la que procede, contactando con la piamadre y capilares fenestrados. En el cerebro de ratón adulto, los tanicitos hipotalámicos, quiescentes en condiciones basales, proliferan in vitro e in vivo tras administración d...

  8. First clinical implant of the VentrAssist left ventricular assist system as destination therapy for end-stage heart failure.

    Science.gov (United States)

    Esmore, Donald S; Kaye, David; Salamonsen, Robert; Buckland, Mark; Rowland, Michael; Negri, Justin; Rowley, Yvonne; Woodard, John; Begg, John R; Ayre, Peter; Rosenfeldt, Franklin L

    2005-08-01

    The VentrAssist device left ventricular assist system, designed for permanent implantation, is a novel centrifugal pump with a hydrodynamically suspended rotor. The first human implant was into a 72-year-old man with New York Heart Association (NYHA) class IV heart failure due to idiopathic dilated cardiomyopathy. The implant and recovery were uneventful, and the patient survives at 17 months, is NYHA class II, and lives at home. This device shows promise in end-stage heart failure for permanent implantation and bridge to transplantation.

  9. Correção de aneurisma de ventrículo esquerdo em paciente chagásico empregando prótese de pericárdio bovino

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    HERRERA Cassius Borsato

    2000-01-01

    Full Text Available Os autores descrevem a correção cirúrgica de aneurisma do ventrículo esquerdo em paciente chagásica que apresentava insuficiência cardíaca. Usando uma prótese de pericárdio bovino foi possível reconstruir a parede aneurismática do ventrículo esquerdo, obtendo-se acentuada redução dos sintomas. Assim, acreditam que os benefícios já adquiridos neste tipo de operação em pacientes com aneurismas de ventrículo esquerdo de etiologia isquêmica, podem ser estendidos aos pacientes chagásicos

  10. Não compactação do Ventrículo Esquerdo. Revisão da Literatura a Propósito de um Caso Clínico

    OpenAIRE

    Magno, P; De Freitas, A.(Deutsches Elektronen-Synchrotron, DESY, Platanenallee 6, D-15738 Zeuthen, Germany); Gil, VM

    2007-01-01

    A não compactação isolada do ventrículo esquerdo (NCIVE) constitui uma etiologia rara de miocardiopatia dilatada, caracterizando-se do ponto de vista morfológico por apresentar dilatação do ventrículo esquerdo, com exuberante padrão trabecular. Embora não esteja claramente demonstrado, é geralmente aceite que a NCIVE resulta da paragem do processo de compactação miocárdica durante a embriogénese. Têm sido descritas formas familiares, estando identificadas alterações de genes que codi...

  11. Anestesia para correção cirúrgica de blalock-taussig e implante de marca-passo em adulto portador de ventrículo único: relato de caso Anestesia para corrección quirúrgica de blalock-taussig e implante de marcapaso en adulto portador de ventrículo único: relato de caso Anesthesia for blalock-taussig shunt and pacemaker placement in an adult patient with univentricular heart: case report

    OpenAIRE

    Michelle Nacur Lorentz; Raquel Reis Soares; Cláudia Vargas Araújo Ribeiro; Friederike Wolff Valadares

    2008-01-01

    JUSTIFICATIVA E OBJETIVOS: O ventrículo único é uma cardiopatia complexa rara e grave, sem possibilidade de tratamento cirúrgico curativo, associada à alta mortalidade durante a primeira infância. O objetivo desse artigo foi descrever um caso raro de paciente adulto com ventrículo único não-operado que se internou para realização de valvoplastia pulmonar via hemodinâmica e acabou sendo submetido à cirurgia de Blalock-Taussig modificado e implante de marca-passo epicárdico. Teve como objetivo ...

  12. O impacto da obesidade isolada na função do ventrículo direito em adultos jovens

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    Abdullah Sokmen

    2013-08-01

    Full Text Available FUNDAMENTO: A obesidade é um fator de risco independente para as doenças cardiovasculares. Os efeitos da obesidade sobre a estrutura e função do ventriculo esquerdo têm sido relatados, mas, relativamente, pouco se sabe sobre o funcionamento do ventrículo direito (VD na obesidade. OBJETIVOS: Avaliar as alterações subclínicas do VD em adultos jovens obesos, porém saudáveis, por ecocardiografia convencional e Doppler tecidual (TDI. MÉTODOS: Neste estudo, foram incluídos 35 indivíduos saudáveis de peso normal, com um índice de massa corporal (IMC 35 kg/m2 (grupo III. Todos os indivíduos foram submetidos a ecocardiografia transtorácica. Além de medidas ecocardiográficas padrão, as velocidades sistólicas de pico do anel tricúspide (Sm, e as velocidado pico diastólico precoce (Em e final (Am, tempo de contração isovolumétrica (TCIm, tempo de relaxamento isovolumétrico (TRIm, e o tempo de ejecção (TEm foram obtidos por TDI e o índice de desempenho do miocárdico do VD (IDMm foi calculado. RESULTADOS: No grupo II, a razão Em/Am do VD foi significativamente menor e o TRIm e o IDMm foram significativamente maiores em relação ao grupo I (p < 0,01. A Sm, Em, e a razão Em/Am do VD foram significativamente menores e TRIm e IDMm do VD foram significativamente maiores no grupo III em relação ao grupo II (p < 0,05 para Sm e TRIm do VD e p < 0,01 para os outros parâmetros. A Am do VD diferiu significativamente entre os grupos I e III (p < 0,05. O IMC teve uma correlação negativa significante com a Sm, Em, e a razão Em/Am do VD, mas uma correlação positiva com o IDM do VD (p < 0,01. CONCLUSÃO: Nosso estudo mostrou que a obesidade isolada em adultos jovens normotensos foi associada com disfunções subclínicas na estrutura e função do VD.

  13. Displasia arritmogénica del ventrículo derecho y enfermedad del nódulo sinusal Arrhythmogenic right ventricular dysplasia and sick sinus syndrome

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    Domingo C. Balderramo

    2004-10-01

    Full Text Available La displasia arritmogénica del ventrículo derecho (DAVD compromete principalmente al ventrículo derecho y debe ser considerada en pacientes jóvenes que presentan síncope, taquicardia ventricular o paro cardíaco y en adultos con insuficiencia cardíaca congestiva. Las alteraciones eléctricas auriculares debidas a DAVD han sido poco descriptas. Informamos el caso de un varón de 60 años con DAVD que durante la evolución presentó enfermedad del nódulo sinusal (tiempo de recuperación del nódulo sinusal de 6113 mseg. Las arritmias auriculares se podrían explicar por el reemplazo gradual de los miocitos auriculares por tejido adiposo.Arrhythmogenic right ventricular dysplasia (ARVD involves primarily the right ventricle, and should be considered in young patients presenting with syncope, ventricular tachycardia, cardiac arrest or in adults patients with congestive heart failure. Atrial electrical abnormalities due to ARVD have been rarely described. We report a case of ARVD in a 60-year-old man who developed sick sinus syndrome during evolution (sinus node recovery time of 6113 mseg. Atrial arrhythmias may be explained by gradual replacement of right atrium myocytes by adipose tissue.

  14. Displasia arritmogénica del ventrículo derecho: reporte de un caso y revisión de la literatura

    Directory of Open Access Journals (Sweden)

    Gilberth Vásquez Esquivel

    2011-06-01

    Full Text Available La displasia arritmogénica del ventrículo derecho se caracteriza por atrofia y reemplazo fibroso y graso del miocardio, y arritmias ventriculares. Se reporta el caso de una mujer de 54 años que se presentó con choque circulatorio fatal, haciéndose el diagnostico patológico de displasia arritmogénica del ventrículo derecho. Se discuten las características clínicas, diagnóstico y manejo de esta cardiopatía potencialmente letal y aún poco comprendida.Arrhythmogenic Right Ventricular Dysplasia: A Case Report and Review of the Literature Arrhythmogenic right ventricular dysplasia is characterized by atrophy, myocardial fibrofatty replacement and ventricular arrhythmias. The case of a 54-year- old woman with fatal cardiogenic shock and a pathological diagnosis of arrhythmogenic right ventricular dysplasia is presented. The clinical characteristics, diagnosis and management of this potentially lethal, and still poorly understood, cardiopathy are discussed.

  15. Anestesia para implante de marca-passo em paciente adulto com ventrículo único não-operado: relato de caso Anestesia para implante de marcapaso en paciente adulto con ventrículo único no operado: relato de caso Anesthesia for pacemaker implant in an adult patient with unoperated univentricular heart: case report

    Directory of Open Access Journals (Sweden)

    Adriano Bechara de Souza Hobaika

    2007-02-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Ventrículo único é anormalidade rara encontrada em cerca de 1% dos pacientes com cardiopatia congênita. Somente 11 casos de pacientes com ventrículo único não-operado e idade acima de 50 anos foram relatados na literatura. Este trabalho teve como objetivo descrever a conduta anestésica em paciente com ventrículo único para implante de marca-passo. RELATO DO CASO: Paciente do sexo feminino, 47 anos, com presença de dupla via de entrada do ventrículo esquerdo, L-transposição de grandes artérias e estenose subpulmonar, sem correção cirúrgica prévia, foi agendada para implante de marca-passo cardíaco definitivo seqüencial de duas câmaras. Ao MAPA apresentava bloqueio atrioventricular de segundo grau e uma freqüência cardíaca média de 45 bpm. Os exames pré-operatórios mostravam hematócrito de 57%, coagulograma normal, função ventricular preservada. A monitorização constou de oxímetro de pulso, ECG nas derivações D II e V5, PIA, capnógrafo e analisador de gases. Um marca-passo temporário transcutâneo foi disponibilizado no caso de bradicardia intensa. A anestesia foi induzida com fentanil (0,25 mg, etomidato (20 mg e atracúrio (35 mg. Quatro minutos após a indução, a freqüência cardíaca diminuiu para 30 bpm, sendo administrado 1 mg de atropina, com reversão da bradicardia. A anestesia foi mantida com sevoflurano a 2,5%, ar 60% e oxigênio 40%. O estado hemodinâmico e a saturação de oxigênio permaneceram estáveis. A paciente foi encaminhada à unidade de terapia intensiva estável e extubada ao final do procedimento. CONCLUSÕES: A conduta anestésica para implante de marca-passo em paciente de 47 anos com dupla via de entrada do ventrículo esquerdo e estenose subpulmonar não-operada foi adequada, haja vista que permitiu a realização do procedimento indicado.JUSTIFICATIVA Y OBJETIVOS: Ventrículo único es una anormalidad rara encontrada en aproximadamente 1% de los

  16. Comportamiento fractal del ventrículo izquierdo durante la dinámica cardiaca Fractal behaviour of the left ventricle during heart dynamics

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    Javier Rodríguez

    Full Text Available La geometría fractal caracteriza objetivamente los grados de irregularidad de los objetos naturales. De otro lado, las dimensiones fractales permiten definir matemáticamente la irregularidad de las formas naturales, como por ejemplo las estructuras cardiacas. El ventrículo izquierdo se estudia a través del ventriculograma, y es a partir de este examen con la aplicación de la geometría fractal, que se puede calcular el grado de irregularidad, de forma objetiva y reproducible para cualquier paciente. A partir de 17 ventriculogramas de 6 de pacientes con fracción de eyección normal y 11 con fracción de eyección fracción menor a 40%, con diagnóstico de compromiso ventricular severo, se desarrolló una medida cuantitativa de los ventriculogramas en la que se evaluaron los grados de similitud entre las dimensiones fractales de los contornos ventriculares izquierdos durante la dinámica cardíaca, en sístole, diástole y totalidad. Se observó que el grado de similitud entre las dimensiones fractales de las comparaciones hechas en los contornos de un ventrículo sano, varía entre 20,9 y 210, mientras que las de un ventrículo con fracción de eyección menor a 40% se encuentra entre 210 y 2500 al menos en uno de los cotejos realizados.Fractal geometry is the geometry that objectively characterizes the degrees of irregularity of natural objects. On the other hand, fractal dimensions allow defining mathematically the irregularity of natural forms such as those of the heart structures. The left ventricle is studied through ventriculography, and by the application of fractal geometry to this exam, it is possible to calculate the degree of irregularity in an objective and reproducible way in any patient. From 17 ventriculographies, 6 from patients with normal ejection fraction and 11 with ejection fraction <40%, with diagnosis of severe ventricular involvement, a quantitative measurement from the ventriculographies was developed in which the

  17. Dessincronia ventricular e aumento dos níveis de BNP na estimulação apical do ventrículo direito

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    Cláudia Drummond Guimarães Abreu

    2011-08-01

    Full Text Available FUNDAMENTO: A estimulação apical crônica do ventrículo direito pode ocasionar dessincronia ventricular e, secundariamente, alterações neuro-humorais e aumento da morbimortalidade cardíaca. OBJETIVO: Pesquisar dessincronia ventricular e seus efeitos sobre os níveis de BNP em pacientes com marca-passo estimulados cronicamente no ápice do ventrículo direito (VD. MÉTODOS: Estudo transversal com 85 pacientes com marca-passo uni ou bicameral, em classe funcional I e II da NYHA e fração de ejeção do ventrículo esquerdo (FEVE > 35%. A avaliação de dessincronia foi realizada utilizando-se várias técnicas ecocardiográficas, incluindo o Tissue Synchronization Imaging (TSI, com análise dos 12 segmentos. O BNP foi dosado junto com o ecocardiograma, porém com o examinador cego. RESULTADOS: Quarenta e seis mulheres e 39 homens, com idade de 58 ± 12 anos, chagásicos (56% e hipertensos controlados (62%, foram incluídos. A fração de ejeção do VE foi 52 ± 8% e a duração média do QRS de 139 ms (120-180 ms. O BNP mostrou-se alterado em 36,5% da amostra (ponto de corte de 60 pg/ml. Na análise multivariada de regressão linear, o BNP correlacionou-se com a idade (p = 0,024, FEVE (p < 0,0001 e tempo pré-ejetivo do VE (p = 0,009, que é índice de dessincronia intraventricular. CONCLUSÃO: Em pacientes com estimulação cardíaca convencional, estáveis clinicamente, a dessincronia intraventricular foi um preditor independente do aumento dos níveis de BNP, após ajuste pela idade e FEVE.

  18. Caractéristiques de l’habitat du singe à ventre rouge (Cercopithecus e. erythrogaster) dans le Sud-Bénin

    OpenAIRE

    Kassa, Barthélémy; Nobimè, Georges; Hanon, Laurence; Assogbadjo, Achille Ephrem; Brice SINSIN

    2014-01-01

    Introduction Le singe à ventre rouge (Cercopithecus erythrogaster erythrogaster) est une sous-espèce de cercopithèque endémique au Bénin (Grubb et al., 1999). Il colonise des habitats résiduels de forêts denses semi-décidues et les anciennes jachères de la vallée de l’Ouémé au sud du Bénin (Sinsin et al. 2002a). L’état de mosaïque qui caractérise la structure spatiale de son habitat et la taille relativement réduite de sa population nous conduisent à prendre en compte le risque de disparition...

  19. Caracterización no invasiva de la diferencia de presión de llenado del ventrículo derecho

    OpenAIRE

    Cortina Camarero, Cristina de

    2011-01-01

    Desde hace pocos años se ha empezado a considerar la relevancia de la función del ventrículo derecho (VD) en la fisiología y fisiopatología cardiacas. Sin embargo, los métodos diagnósticos para detectar y cuantificar la disfunción del VD son escasos. Especialmente, las herramientas diagnósticas no invasivas para la caracterización de las propiedades diastólicas del VD son muy limitadas. Únicamente, mediante el empleo de catéteres de alta fidelidad o métodos complejos de ecografía tridim...

  20. Disfunção do homoenxerto pulmonar utilizado na reconstrução do trato de saída do ventrículo direito

    Directory of Open Access Journals (Sweden)

    Andréa Weirich Lenzi

    2011-01-01

    Full Text Available FUNDAMENTO: O homoenxerto pulmonar tem sido utilizado como uma opção na correção de cardiopatia congênita com obstrução da via de saída do ventrículo direito. Os resultados em longo prazo, no entanto, mostram-se pouco satisfatórios. OBJETIVO: Identificar os fatores de risco associados à disfunção e à falência do homoenxerto pulmonar. MÉTODOS: Estudo em crianças submetidas à ampliação da via de saída do ventrículo direito com homoenxerto pulmonar. As variáveis clínicas, cirúrgicas, evolutivas e de aspectos morfológicos da prótese foram analisadas como fatores de risco. RESULTADOS: A amostra final de 75 pacientes com idade mediana na cirurgia de 22 meses, variando de 1-157 meses, apresentou 13 pacientes (17,0% que desenvolveram disfunção do homoenxerto, caracterizado por estenose ou insuficiência pulmonar grave. O tempo de ocorrência entre o implante do homoenxerto e a detecção da disfunção foi de 45 ± 20 meses. Quando o tamanho do homoenxerto foi menor de 21 mm e o escore Z da valva pulmonar foi menor do que zero, ou maior do que três, foram considerados fatores de risco para a ocorrência de disfunção. CONCLUSÃO: O homoenxerto pulmonar de tamanho menor do que 21 mm e a valva pulmonar inadequada para idade e peso do paciente são fatores determinantes para disfunção da prótese.

  1. Taquicardia ventricular del tracto de salida del ventrículo derecho durante el embarazo Right ventricular outflow tachycardia during pregnancy

    Directory of Open Access Journals (Sweden)

    Ariel K. Saad

    2012-06-01

    Full Text Available Durante el embarazo aumentan el metabolismo basal, el consumo de O2, la frecuencia cardíaca, el volumen sistólico, el volumen minuto y la volemia y disminuyen la tensión arterial y la resistencia periférica. Diferentes estudios han demostrado que durante este período la posibilidad de que ocurra una arritmia cardíaca o se produzca la exacerbación de una arritmia preexistente es mayor. No obstante, en su enorme mayoría carecen de importancia pronóstica tanto para la madre como para el feto. La taquicardia ventricular del tracto de salida del ventrículo derecho es una arritmia poco frecuente y su aparición se ha correlacionado con el aumento del tono adrenérgico. Se presentan los casos de dos pacientes que mostraron en el curso de la gestación reiterados episodios de taquicardia ventricular del tracto de salida del ventrículo derecho. Se analiza la asociación del embarazo con la ocurrencia de trastornos del ritmo cardíaco.During pregnancy, there is an increase in metabolism, oxygen consumption, heart rate, stroke volume, cardiac output, blood volume and a decrease in blood pressure and peripheral resistance. Studies have shown that during this period the occurrence of cardiac arrhythmias is not uncommon. Fortunately, malignant arrhythmias are rare. Herein we report two young patients who presented with symptomatic right ventricular outflow tachycardia during pregnancy that required antiarrhythmic therapy. Possible pathophysiologic mechanisms are discussed.

  2. Changes in the processing of heavy {alpha}-contaminated equipment at the Marcoule center; L'evolution du conditionnement des gros materiels contamines en {alpha} sur le centre de Marcoule

    Energy Technology Data Exchange (ETDEWEB)

    Seyfried, P. [Commissariat a l' Energie Atomique, Chusclan (France). Centre de Production de Plutonium de Marcoule

    1969-07-01

    The processing of heavy {alpha}-contaminated equipment at the Marcoule Centre has been carried out for a long time by a rather expensive 'manual' method. It has become necessary to reduce these costs by using more automated methods. Two studies which have been carried out have shown that when the amount of waste to be treated is large and is composed mainly of plastic material, it is possible to design economic installations using cooling and shock demolition, conventional compaction leading to rather poor results. For average quantities, a cutting-up reservoir, used also for other purposes, makes it possible to solve these processing problems at Marcoule. The costs involved are much lower than those previously required in the case of so-called 'manual' methods. (author) [French] Le conditionnement du gros materiel contamine en {alpha} a longtemps ete effectue sur le Centre de Marcoule par une methode 'manuelle' assez couteuse. Il est apparu necessaire de chercher a reduire les couts en utilisant des methodes plus automatisees. Deux etudes ont permis de montrer que lorsque les quantites a traiter sont grandes et interessent surtout des dechets plastiques, on pouvait concevoir economiquement des installations utilisant le refroidissement et choc, le compactage classique donnant des resultats assez decevants. Pour les quantites moyennes, une piscine de decoupage, utilisable d'ailleurs a d'autres fins, permet de resoudre, a Marcoule, le probleme du conditionnement. Les frais sont tres inferieurs a ceux anciennement engages avec les methodes 'manuelles'. (auteur)

  3. Disfunção sistólica aguda de ventrículo esquerdo após drenagem de derrame pericárdico Transient left ventricular systolic dysfunction after pericardial effusion drainage

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    Fábio Branco de Araújo Brauner

    1997-12-01

    Full Text Available Paciente com timoma e função sistólica normal do ventrículo esquerdo desenvolveu tamponamento cardíaco, revertido por pericardiocentese. Após quatro dias, foi submetida à exérese do tumor e, em aproximadamente uma semana da drenagem, apresentou disfunção sistólica aguda e grave do ventrículo esquerdo, que melhorou com terapia venosa, normalizando o quadro em três dias.A patient with a thymoma and initially normal ventricular systolic function developed cardiac tamponade, which was relieved by pericardiocentesis. After four days, the tumor was removed and, one week after the relief of tamponade, she developed severe left ventricular systolic dysfunction, that recovered in three days with venous therapy.

  4. Modelo experimental de bandagem ajustável do tronco pulmonar para preparo rápido do ventrículo

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    DIAS Carlos A.

    2000-01-01

    Full Text Available OBJETIVO: Um dispositivo de bandagem do tronco pulmonar (TP com ajuste percutâneo foi desenvolvido com o objetivo de induzir a hipertrofia rápida do ventrículo subpulmonar. MATERIAL E MÉTODOS: Consiste de um manguito de silicone insuflável percutaneamente, através de um botão de silicone auto-selante. Os corações de 7 cabritos jovens (peso médio: 8,7 kg foram submetidos à sobrecarga sistólica imposta pelo dispositivo e avaliados sob os aspectos hemodinâmicos, ecocardiográficos e morfológicos. Foram extraídas biópsias basais do miocárdio do ventrículo direito (VD para análise microscópica (perímetro e área do miócito. O dispositivo foi implantado no TP. As pressões do VD, TP e aorta foram monitorizadas. Após convalescença, foi iniciado o protocolo de insuflação do dispositivo de bandagem do TP. Foi injetada água destilada no botão auto-selante (via percutânea, até que a pressão sistólica do VD atingisse 70% da pressão sistólica do VE. As avaliações ecocardiográfica e hemodinâmica foram realizadas a cada 24 horas. A sobrecarga sistólica do VD foi mantida por um período de 96 horas, com insuflações progressivas no limite máximo tolerado, a cada 24 horas. Após esse período, os animais foram sacrificados para análise morfológica dos corações. Outros 9 cabritos (peso médio: 7,7 kg foram utilizados como grupo controle, para análise do peso do VD. RESULTADOS: Após 96 horas de sobrecarga sistólica do VD, foi observado um aumento do gradiente sistólico VD/TP de 10,1±4,3 mmHg para 60,0±11,0 mmHg e da pressão sistólica no VD de 22,4±4,1 mmHg para 71,0±10,0 mmHg (p<0,0001. O ecocardiograma revelou aumento da espessura muscular do VD, de 4,4±0,5 mm para 7,3±1,7 mm (p=0,001. Quando comparado ao grupo controle, houve um ganho de peso de 74% do VD submetido à sobrecarga sistólica (p<0,0001. À microscopia óptica, foi observado aumento de 27% no perímetro e de 69% na área dos miócitos (p=0

  5. Colloidal cyst of the third ventricle. Case presentation Quiste coloide del tercer ventrículo. Presentación de un caso

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    Joan O Rojas Fuentes

    2009-09-01

    Full Text Available

    Colloidal cysts are congenital intracranial benign lesions of the anterior superior portion of the third ventricle. They represent between the 0,2 and 2 % of all the intracranial tumours and represent the 15 or 20 % of all the intraventricular masses. They become symptomatic during the adolescence or early adulthood and start normally with migraine or symptoms of intracranial hypertension causing obstructive hydrocephaly. We present the case of a teenager of 18 years of age with history of migraine after two years and the symptoms worsened in intensity and frequency including vomiting and bilateral paresthesia; the diagnosis was obstructive hydrocephaly with colloidal cyst of the third ventricle. An appropriate practice was adopted due to the uncertain diagnosis in order to avoid neurological damage and death. We discussed the main characteristics of the colloidal cyst, its clinical presentation and radiological characteristics and we performed.

    Los quistes coloides son lesiones intracraneales congénitas benignas, de la porción antero-superior del tercer ventrículo. Suponen del 0,2 al 2 % de todos los tumores intracraneales y representan del 15 al 20 % de todas las masas intraventriculares. Comienzan a ser sintomáticos en la adolescencia o edad adulta temprana, generalmente con manifestaciones de cefalea o síntomas de hipertensión intracraneal al provocar hidrocefalia obstructiva. Se presenta una adolescente de 18 años con historia de cefalea de 2 años de evolución, cuyos síntomas fueron empeorando en intensidad y frecuencia, acompañados de vómitos y parestesias bilaterales; se le diagnosticó hidrocefalia obstructiva con quiste coloide del tercer ventrículo. Ante la sospecha del diagnóstico se tomó una conducta adecuada, para evitar el deterioro neurológico y la muerte. Se discutieron las principales características del quiste coloide, su cuadro clínico y radiológico.

  6. Ecocardiografia e teste de caminhada de 6 minutos na disfunção sistólica do ventrículo esquerdo Ecocardiografía y prueba de caminata de 6 minutos en la disfunción sistólica del ventrículo izquierdo chocardiography and 6-minute walk test in left ventricular systolic dysfunction

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    Venera Berisha

    2009-02-01

    Full Text Available FUNDAMENTO: Insuficiência cardíaca crônica é um grave distúrbio cardiovascular. OBJETIVO: O objetivo deste estudo foi avaliar prospectivamente se o resultado do teste de caminhada de 6 minutos (TC-6M se correlaciona com as variáveis ecocardiográficas em pacientes portadores de disfunção sistólica do ventrículo esquerdo e insuficiência cardíaca crônica estável. MÉTODOS: Foram estudados prospectivamente 52 pacientes (65% homens; média de idade de 60±11 anos portadores de insuficiência cardíaca crônica secundária à cardiopatia isquêmica ou miocardiopatia idiopática. Todos os pacientes apresentavam disfunção sistólica do ventrículo esquerdo (fração de ejeção FUNDAMENTO: La insuficiencia cardiaca crónica es un grave disturbio cardiovascular. OBJETIVO: El objetivo de este estudio fue evaluar prospectivamente si el resultado de la prueba de caminata de 6 minutos (PC-6M se correlaciona con las variables ecocardiográficas en pacientes portadores de disfunción sistólica del ventrículo izquierdo e insuficiencia cardiaca crónica estable. MÉTODOS: Se estudiaron prospectivamente a 52 pacientes (el 65% varones; promedio de edad de 60±11 años portadores de insuficiencia cardiaca crónica secundaria a la cardiopatía isquémica o la miocardiopatía idiopática. Todos los pacientes presentaban disfunción sistólica del ventrículo izquierdo (fracción de eyección BACKGROUND: Chronic heart failure is a major cardiovascular disorder. OBJECTIVE: The aim of this study was to prospectively examine whether a 6-min walk test (6-MWT result correlates with echocardiographic variables in patients with left ventricular systolic dysfunction and stable chronic heart failure. METHODS: We prospectively studied 52 patients (65% male; mean age 60±11 years who had chronic heart failure secondary to ischemic heart disease or idiopathic cardiomyopathy. All patients had left ventricular systolic dysfunction (ejection fraction <0.45, and

  7. Cirugía de tipo uno y medioventricular en la doble salida del ventrículo izquierdo One a half ventricular surgery type in the double outlet of left ventricle

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    Luis Marcano Sanz

    2012-03-01

    Full Text Available La doble salida del ventrículo izquierdo es muy poco frecuente, en la cual la aorta y la arteria pulmonar, emergen completa o predominantemente del ventrículo izquierdo. Cuando se acompañan de comunicación interventricular y de estenosis pulmonar la corrección se realiza usualmente con interposición de un conducto entre el ventrículo derecho y la arteria pulmonar. El objetivo del presente trabajo es presentar un caso tratado con cirugía de tipo uno y medio ventricular, pues, hasta donde conocemos, esta técnica no ha sido empleada en esta enfermedad para evitar el uso de conductos protésicos. Se reporta en una niña de 3 años de edad, a quien se le cerró la comunicación interventricular, se desconectó la arteria pulmonar del ventrículo izquierdo y se anastomosó al nuevo tracto de salida del ventrículo derecho, y se realizó derivación cavopulmonar parcial. Después de 6 años de seguimiento presenta buena evolución clínica, ecocardiográfica y capacidad funcional adecuada.The double outlet of the left ventricle is uncommon, where the aorta and the pulmonary artery emerge total or predominantly from the left ventricle. When they are accompanied of an interventricular communication and of pulmonary stenosis, the correction is usually carried out with the insertion of a conduct between the right ventricle and the pulmonary artery. The objective of present paper is to present a case treated with one half ventricular surgery type and ventricular medium, since until is known, this technique has not used in this disease to avoid the use of prosthetic conducts. Authors reports the case of a girl aged 3 undergoes the closure of the interventricular communication, switching off the pulmonary artery of the left ventricle and anastomosing it to the new outlet tract of right ventricle, carrying out a partial cavopulmonary bypass. After 6 years of follow-up she has a good clinical and echocardiographic evolution as well as a appropriate

  8. Análise da atividade da enzima conversora da angiotensina na hipertrofia aguda do ventrículo direito em modelo experimental de estenose endovascular ajustável do tronco pulmonar

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    RABELLO Renato Rocha

    2001-01-01

    Full Text Available INTRODUÇÃO: A bandagem do tronco pulmonar (TP tem sido aplicada para treinamento do ventrículo esquerdo (VE em pacientes portadores de transposição das grandes artérias (TGA com septo íntegro. Este procedimento, além de apresentar alta morbi-mortalidade, pode ocasionar alterações da função ventricular a longo prazo. Com o objetivo de analisar a hipertrofia aguda do ventrículo direito (VD, foi implantado um cateter balão no TP de seis cabritos jovens. MATERIAL E MÉTODOS: A sobrecarga sistólica foi aplicada através de insuflações progressivas do balão, durante 96 horas. Esta hipertrofia foi acompanhada por medidas hemodinâmicas diárias, através de cateteres implantados na aorta, VD e TP, além de ecocardiogramas seriados a cada 24 horas, com medidas das espessuras do septo interventricular e dos ventrículos. Ao final das 96 horas, os animais foram mortos para remoção dos corações. Os ventrículos e o septo foram pesados separadamente. Foram colhidas biópsias musculares de cada câmara para análise da atividade da enzima conversora da angiotensina (ECA. Oito cabritos (idade e peso semelhantes foram utilizados como controle para os pesos dos ventrículos e para a atividade da ECA. RESULTADOS: Observou-se um aumento do gradiente VD/TP (p=0,001, com conseqüente aumento da razão VD/VE (p=0,005 durante o tempo de sobrecarga sistólica. Ao fim do protocolo, a parede livre do VD apresentou aumento de espessura (p=0,002 e, conseqüentemente, um aumento do peso indexado (p=0,002. A análise da atividade da ECA revelou aumento somente no músculo do VD hipertrofiado (p=0,002. CONCLUSÃO: O cateter balão foi eficiente em induzir a hipertrofia aguda do VD através do protocolo utilizado. Conseqüentemente, um aumento expressivo da atividade da ECA está associado ao processo de hipertrofia miocárdica induzida por sobrecarga pressórica.

  9. Diagnóstico pré-natal de aneurisma e divertículo do ventrículo esquerdo Diagnóstico prenatal de aneurisma y divertículo del ventrículo izquierdo Prenatal diagnosis of left ventricular aneurysm and diverticulum

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    Marcia F. A. Barberato

    2009-08-01

    Full Text Available Descrevemos dois casos de protrusão localizada do ventrículo esquerdo (VE, entidade que tem sido descrita na literatura como aneurisma ou divertículo. Em ambos os casos, observou-se uma evolução distinta da anteriormente relatada. A incidência e história natural dessas raras anomalias são pouco conhecidas, podendo evoluir de forma assintomática ou gerar graves complicações e até o óbito no período pré-natal. A abordagem terapêutica deve ser individualizada.Describimos dos casos de protrusión localizada del ventrículo izquierdo (VI, entidad que se describe en la bibliografía como aneurisma o divertículo. En ambos casos se observó una evolución distinta a la anteriormente relatada. La incidencia e historia natural de estas raras anomalías son poco conocidas, pudiendo evolucionar de forma asintomática o generar graves complicaciones e incluso el óbito en el período prenatal. El abordaje terapéutico debe ser individualizado.We report two cases of localized left ventricular (LV protrusion, an entity that has been described in the literature as aneurysm or diverticulum. Both cases had different outcomes from those previously reported. Little is known on the incidence and natural history of these rare anomalies, whose progression may be asymptomatic or lead to severe complications and death in the prenatal period. The therapeutic approach should be customized.

  10. Ergometría en pacientes con bypass total de ventrículo venoso con tubo extracardíaco

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    Inés T. Abella

    2007-01-01

    Full Text Available IntroducciónLas diversas modificaciones técnicas introducidas a lo largo de los años en los procedimientos hemodinámicos y quirúrgicos han hecho posible que pacientes que inicialmente no reunían los criterios básicos para ser sometidos a un bypass total de ventrículo venoso con tubo extracardíaco pudieran acceder tardíamente a esta cirugía.ObjetivoAnalizar la respuesta al esfuerzo de pacientes operados antes de los 10 años y después de esta edad con bypass total de ventrículo venoso (BTVV con tubo extracardíaco (EC.Material y métodosSe evaluaron 49 pacientes, que se dividieron en dos grupos: A (n = 24 intervenidos antes de los 10 años en forma electiva (menor riesgo y B (n = 25 operados después de los 10 años, con patologías más complejas (mayor riesgo; en estos pacientes se incluyen reconversiones de anastomosis auriculopulmonares (AAP.ResultadosLa edad actual (grupo A: 8,58 ± 2,54 años, grupo B: 20,84 ± 6,99 años y la edad quirúrgica (grupo A: 6,15 ± 1,78 años, grupo B: 18,04 ± 7,16 años fueron significativamente diferentes (p < 0,000001, con un tiempo de seguimiento similar para ambos grupos (A: 2,49 ± 1,51 años, B: 2,82 ± 1,6 años. La CF en porcentaje de CF esperada fue mejor en el grupo A que en el B (A: 81,7% ± 13,9%, B: 60,24% ±15,9%; p < 0,000001. Se comparó la SatO2 (% de reposo con la del máximo esfuerzo de los 49 pacientes; ésta resultó significativamente más baja (p < 0,000001 en el máximo esfuerzo (92% ± 4,77% versus 82,45% ± 7,39% secundario a la fenestración. Presentaron arritmias 7 pacientes del grupo A (29% y 15 (60% del grupo B.ConclusionesA igual tiempo de seguimiento, la respuesta al esfuerzo es mejor en los pacientes operados más tempranamente y con menos factores de riesgo. En este grupo se observa además un porcentaje menor de arritmias.

  11. Atuação fonoaudiológica na hidrocefalia congênita com derivação ventrículo peritoneal: relato de caso

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    Nayana Thaysse Araújo Muniz

    2015-08-01

    Full Text Available Resumo:A Hidrocefalia é definida como um transtorno na hidrodinâmica liquórica, com aumento do seu volume no compartimento intracraniano, da dilatação ventricular e da pressão intracraniana. O tratamento da hidrocefalia é feito com uso de válvulas de derivação periventricular (shunt. Se não for tratada, a criança com hidrocefalia poderá apresentar macrocefalia, retardo do desenvolvimento neuropsicomotor, infecções, meningites, dificuldades para aprender e alimentar-se (disfagia. Este estudo busca relatar as principais alterações fonoaudiológicas encontradas em um indivíduo diagnosticado com hidrocefalia congênita, tratada tardiamente com derivação ventrículo peritoneal. Trata-se de um estudo retrospectivo, descritivo dos dados contidos no prontuário. O paciente apresentou alterações de órgãos fonoarticulatórios, sialorréia, apertamento mandibular e Disfagia Orofaríngea Neurogênica de grau Moderado/Severo. Foram realizados exercícios de estimulação profunda, crioterapia, pontos motores da face, manobras facilitadoras da deglutição e correção postural durante a oferta de via oral. A literatura para atuação fonoaudiológica na hidrocefalia é escassa, porém, com este relato de caso, foi possível relatar as principais alterações fonoaudiológicas e intervenções terapêuticas encontradas na Hidrocefalia Congênita.

  12. Comportamento do índice de massa do ventrículo esquerdo de pacientes em diálise no decorrer de 17 anos

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    Loren Giagio Cavalcante

    2015-09-01

    Full Text Available ResumoIntrodução:A hipertrofia ventricular esquerda (HVE é alteração frequente em pacientes de diálise e imprime prognóstico sombrio. Não se conhece qual a tendência secular dessa alteração cardíaca em nossos pacientes.Objetivo:Avaliar o comportamento da HVE, pelo índice de massa do ventrículo esquerdo (IMVE, no decorrer de 17 anos em pacientes de um centro universitário de diálise, bem como verificar as possíveis causas desse comportamento.Métodos:Foi realizado um estudo longitudinal retrospectivo que avaliou, por meio de ecocardiografia, o IMVE em pacientes submetidos à hemodiálise em nosso Serviço de Diálise durante o período de 17 anos, de 1993 a 2010. Foram incluídos 250 exames de pacientes com doença renal crônica estágio V-D com idade superior a 18 anos que foram submetidos à avaliação ecocardiográfica de rotina.Resultados:Notou-se redução do IMVE à medida que os anos avançavam. Essa redução correlacionou-se à diminuição da pressão arterial e à elevação da hemoglobina. Em análise múltipla, a massa ventricular esquerda associou-se apenas à pressão arterial.Conclusão:A porcentagem de pacientes com HVE sofreu redução significante no decorrer de 17 anos em nossa Unidade de Diálise. O fator associado a essa redução foi a diminuição da pressão arterial.

  13. Application of a Detailed Emission Model for Heavy Duty Diesel Engine Simulations Application d'un modèle détaillé d'émissions pour la simulation de gros moteurs diesel

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    Magnusson I.

    2006-12-01

    Full Text Available A detailed chemical model describing the formation of soot and NO is applied to simulate emission formation in a heavy duty diesel engine. Cylinder flow and spray development is simulated using an engine CFD code - Speedstar. Combustion is described using a simple eddy break-up model. Modeling of the emission-chemistry/turbulent-flow interaction is based on a flamelet approach. Contrary to a typical flamelet concept, transport equations are solved for mass fractions of soot and NO. The reason being that these major emission constituencies are assumed to change slowly in comparison to typical time scales for chemical processes or transport processes important for combustion. Chemical reactions leading to production and destruction of soot and NO are, however, assumed to be fast. Soot and NO source terms are therefore evaluated from a flamelet library using a presumed probability density function and integrating over mixture fraction space. Results from simulations are compared to engine measurements inform of exhaust emission data and cylinder pressure. Un modèle avec chimie détaillée décrivant la formation des suies et du NO est appliqué à la simulation de la formation des polluants dans un gros moteur Diesel. L'écoulement et le spray sont modélisés avec le code de calcul Speedstar. La combustion est représentée par le modèle eddy break-up . La modélisation de l'interaction entre l'écoulement turbulent et la chimie des polluants est basée sur une approche de type flamelet . Cependant, à la différence d'autres travaux, des équations de transport pour les fractions massiques de suies et de NO sont résolues. Cela est justifié par la supposition que les temps caractéristiques de formation de ces composés sont longs comparés à ceux associés aux phénomènes de transport et aux réactions chimiques associées à la combustion. Cependant, les vitesses de réaction se rapportant aux suies et au NO sont supposées rapides. Cela

  14. Resincronización ventricular: nueva técnica y dispositivo para el implante endocavitario de un catéter en el ventrículo izquierdo

    OpenAIRE

    2010-01-01

    RESUMENLas dificultades inherentes a la técnica de implante de resincronizadores han generado lanecesidad de buscar nuevas opciones, como el implante endocavitario en el ventrículo izquierdopor vía transeptal auricular desde la aurícula derecha. En tal sentido, en los últimosaños ya se realizaron varias publicaciones. Si bien los resultados son satisfactorios, entodos los casos se utilizan técnicas “especiales”, que tienen sus dificultades propias y requierengran experiencia y una curva de ap...

  15. River engineering

    NARCIS (Netherlands)

    De Vries, M.

    1993-01-01

    One dimension models - basic eauations, analytical models, numberical models. One dimensional models -suspended load, roughness and resistance of river beds. Solving river problems - tools, flood mitigation, bank protection.

  16. Angioplastia del seno coronario en el implante de electrodo del ventrículo izquierdo Angioplasty of coronary sinus in left ventricle electrode implant

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    Alejandro Orjuela

    2011-07-01

    Full Text Available Con el incremento de implantes de dispositivos de estimulación cardíaca en pacientes con miocardiopatía dilatada, el diseno día a día más sofisticado de los mismos para satisfacer los requerimientos de los pacientes con cambios anatómicos que surgen como consecuencia de la misma dilatación cardíaca, tales como modificaciones en el calibre, curso, longitud y número de venas coronarias, cada vez se encuentran mayores dificultades para lograr los objetivos anatómicos, en particular el sitio ideal de posicionamiento del electrodo de estimulación ventricular izquierda en el seno coronario. Esta situación limita, en algunos casos, el beneficio terapéutico de esta técnica, viéndose, en ocasiones, en la necesidad de someter al paciente a toracotomía para posicionar el electrodo en el epicardio posterolateral del ventrículo izquierdo. Es así como, con el objetivo de abreviar los tiempos y la morbimortalidad e incrementar el éxito del implante, se disenó una estrategia basada en la técnica de hemodinámica para vencer las obstrucciones de las arterias coronarias y lograr, mediante angioplastia de las estrecheces del seno coronario, un abordaje más preciso a un determinado vaso epicárdico preseleccionado. Se describe la técnica usada en la angioplastia del seno coronario para este propósito.The design of devices of cardiac stimulation in patients with dilated cardiomyopathy has become more sophisticated due to the increment of its implantation, devices that must satisfy the requirements for patients with anatomical changes that appear as a consequence of the cardiac dilation such as caliber modifications, course, length and number of coronary veins. Every time is more difficult to achieve the anatomical objectives, particularly the ideal place for the left ventricular stimulation electrode position in the coronary sinus. This situation limits in some cases the therapeutical benefit of this technique, occasionally facing to the

  17. Pressão diastólica final do ventrículo esquerdo e síndromes coronarianas agudas

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    Rogério Teixeira

    2011-08-01

    Full Text Available FUNDAMENTO: Há falta de dados sobre o impacto prognóstico da pressão diastólica final do ventrículo esquerdo (PDFVE sobre as síndromes coronarianas agudas (SCA. OBJETIVO: Avaliar a PDFVE e suas implicações prognósticas em pacientes com SCA. MÉTODOS: Estudo prospectivo, longitudinal e contínuo de 1.329 pacientes com SCA de um único centro, realizado entre 2004 e 2006. A função diastólica foi determinada através da PDFVE. A população foi dividida em dois grupos: Grupo A - PDFVE 26,5 mmHg (n = 226. RESULTADOS: Não houve diferenças significantes entre os grupos em relação aos fatores de risco para doença cardiovascular, histórico médico e terapia médica durante a admissão. Nos pacientes do grupo A, a SCA sem elevação do segmento ST foi mais frequente, bem como angiogramas coronários normais. A mortalidade hospitalar foi similar entre os grupos, mas a sobrevida de um ano foi maior entre os pacientes do grupo A (96,9 vs 91,2%, log rank p = 0,002. Em um modelo multivariado de regressão de Cox, uma PDFVE > 26,5 mmHg (RR 2,45, IC95% 1,05 - 5,74 permaneceu um preditor independente para mortalidade de um ano, quando ajustado para idade, fração de ejeção sistólica do VE, SCA com elevação do segmento ST, pico da troponina, glicemia na admissão hospitalar e diuréticos após 24 horas. Além disso, uma PDFVE > 26,5 mmHg foi um preditor independente de uma futura rehospitalização por IC congestiva (RR 6,65 IC95% 1,74 - 25,5. CONCLUSÃO: Em nossa população selecionada, a PDFVE apresentou uma influência prognóstica significante.

  18. Reconstrução da continuidade ventrículo-pulmonar (conexão VD-TP: técnicas e táticas cirúrgicas

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    ANIJAR Alberto Mauro

    1998-01-01

    Full Text Available Os autores revisam as técnicas cirúrgicas utilizadas para a reconstrução da continuidade ventrículo direito (VD e o tronco pulmonar (TP, dando ênfase às diferentes técnicas e associação, dependendo das formas anatômicas de cada lesão. Apresentam, para ilustração, 2 casos, operados com o uso de um novo conceito de prótese biológica produzida com a valva pulmonar e o tronco pulmonar suíno, preservados em glutaraldeído mediante dois modelos: retalho bivalvulado e tubo valvulado na experiência atual. No período de maio/91 e junho/95, foram operados 48 pacientes, em 43 foi usado retalho bivalvulado e, em 5 casos, prótese tubular valvulada. Houve 5 (10,4% óbitos imediatos e 2 (4,6% tardios. Este novo conceito de reconstrução da valva pulmonar e via de saída do ventrículo direito, usando heteroenxertos valvulados evita a insuficiência pulmonar significativa e apresenta baixa incidência de calcificação. É uma técnica facilmente reprodutível.

  19. Estudo microanatômico da fissura coroidéia na abordagem dos ventrículos e cisternas cerebrais Microanatomical study of the choroidal fissure in ventricular and cisternal approaches

    Directory of Open Access Journals (Sweden)

    Gustavo R. Isolan

    2005-09-01

    Full Text Available A fissura coroidéia é uma estreita fenda situada na parte medial dos ventrículos laterais, em formato de "C", entre o fórnix e o tálamo e onde o plexo coróide se adere. O fato de não haver tecido nervoso entre o epêndima e a pia-máter ao longo deste acidente anatômico torna-o uma importante via no acesso aos ventrículos e cisternas cerebrais. Foram estudados cinco cérebros, injetando-se artérias e veias com material siliconado colorido e cinco cérebros sem realce colorido dos vasos, num total de 20 hemisférios cerebrais. Foram analisadas e revisadas as relações neurais, arteriais e venosas, bem como as abordagens cirúrgicas em cada parte da fissura coroidéia. Concluiu-se que o conhecimento prévio detalhado desta microanatomia é fundamental para os neurocirurgiões que vão abordar lesões nos ventrículos e cisternas cerebrais, pois se obtém uma noção tridimensional que será indispensável durante o ato cirúrgico.The choroidal fissure is a narrow cleft in the medial part of the lateral ventricle, in a C-shaped arc, between the fornix and the thalamus, where the choroidal plexus join. Due to absence nervous tissue between ependima and pia-mater along this invagination, it is an important route in brain ventricles and cisterns. Five brains were studied by injecting colored silicone arteries and veins and five brains without colored silicone, in a total number of 20 brain hemispheres. It was analized and revised the neural, arterial and venous relationships and surgical approaches in all parts of the choroidal fissure. In conclusion, the previous knowledge detailed this microanatomy is primordial for neurosurgeons that will approach brain ventricular and cisternal lesions because the neurosurgeons gain a tridimensional notion that will be indispensable during surgery.

  20. Ultrastructural study of the lateral ventricle choroid plexus in experimental hydrocephalus in Wistar rats Estudo ultraestrutural dos plexos corióides dos ventrículos laterais de ratos Wistar submetidos a hidrocefalia experimental

    Directory of Open Access Journals (Sweden)

    Daniela Pretti da Cunha Tirapelli

    2007-12-01

    Full Text Available Hydrocephalus is one of the most frequent and complex neurological diseases characterized by the abnormal buildup of cerebrospinal fluid (CSF in the ventricles of the brain, due to an altered CSF dynamics. To detect possible ultrastructural alterations of the lateral ventricles choroid plexus (responsible for the CSF production, rats seven days after birth were submitted to an intracisternal injection of 20% kaolim (hydrated aluminum silicate for the hydrocephalus induction. Twenty-eight or 35 days after injection, injected animals and respective controls were processed for observation under a transmission electron microscopy. Alterations found: presence of concentric cell membrane fragments, larger number of primary and secondary lysossomes, vacuoles, and cytoplasmic vesicles, and an enlargement of the intercellular space and between the basolateral interdigitation of the choroid epithelium. The alterations observed are probably associated to an increase of the ventricular pressure, inducing morpho-functional effects on the choroid plexus integrity.A hidrocefalia é uma das mais freqüentes e complexas doenças neurológicas caracterizada pelo acúmulo de líquido cefalorraquidiano (LCR no interior dos ventrículos cerebrais e conseqüente alteração na dinâmica liquórica. Para detectar as possíveis alterações ultra-estruturais nos plexos corióides dos ventrículos laterais (responsáveis pela produção do LCR, ratos sete dias após o nascimento, foram submetidos à indução de hidrocefalia pela injeção intracisternal de caulim a 20%. Após 28 e 35 dias da injeção, estes animais e seus respectivos controles foram processados para observação em um microscópio eletrônico de transmissão. Alterações observadas: presença de membranas concêntricas, maior número de lisossomos primários e secundários, vacúolos e vesículas citoplasmáticas, aumento do espaço intercelular e entre as interdigitações basolaterais das c

  1. Contested Rivers

    DEFF Research Database (Denmark)

    Gorm Hansen, Louise Lyngfeldt

    explores translocal connections through ethnographic fieldwork at a global water conference and preliminary fieldwork at chosen locations on China's Nu River. The Nu River is one of the last undammed rivers in Asia and runs through China close to the Chinese-Burmese border, then flows into the Andaman Sea...

  2. A constituição do sujeito na atividade estética da dança do ventre Constitution of subjectivity in the aesthetic activity of belly dance

    OpenAIRE

    Alice Casanova dos Reis; Andréa Vieira Zanella

    2010-01-01

    O texto apresenta uma pesquisa cujo objetivo foi compreender de que modo a atividade estética da dança do ventre se concretiza e sua mediação na constituição do sujeito. Partindo de uma perspectiva histórico-cultural, a análise da entrevista com uma bailarina revelou diversas relações estéticas mediando a realização da dança: da bailarina com a técnica, com o corpo, com a música, com o público, com o sagrado, com o feminino. Compreendeu-se que nessas relações se engendram diferentes possibili...

  3. Cisticercose do IV ventrículo. Considerações anátomo-clínicas e sôbre a terapêutica cirúrgica

    Directory of Open Access Journals (Sweden)

    Paulo Pinto Pupo

    1949-09-01

    Full Text Available Após ligeira revisão sôbre o problema anátomo-clínico da neurocisticercose em geral, na qual assinalam as reações locais e gerais provocadas pelo cisticerco no sistema nervoso e as formas clínicas mais comuns com que se apresenta a neurocisticercose — formas convulsivas com ou sem perturbações mentais, forma pseudotumoral, forma hipertensiva e forma apoplética — os autores abordam o problema da cisticercose ventricular, chamando a atenção para sua síndrome clínica mais ou menos bem definida, e para a possibilidade do diagnóstico clínico, particularmente com a ajuda do exame do líqüido cefalorraqueano, cujas alterações constituem síndrome bem definida. O problema da terapêutica cirúrgica é encarado à base de 4 observações pessoais e da revisão da literatura, concluindo-se por certo pessimismo quanto a seus resultados, por dependeram êles do diagnóstico precoce da afecção, antes que o cisticerco determine conseqüências anatômicas irreversíveis no encéfalo, e da eventualidade, pouco freqüente, de não haver outros cisticercos cerebrais. De seus casos, o primeiro apresentava cisticerco do IV ventrículo isolado, e aracnoidite crônica na fossa posterior, motivo pelo qual, após a extirpação do cisticerco, ainda o quadro clínico continuou a evoluir com surtos hipertensivos e períodos de remissão de sintomas, até a agravação final e morte 20 meses após o ato operatório; o segundo apresentava cisticerco único aderente ao assoalho do IV ventrículo, provocando grande reação focal e oclusão quase total da luz ventricular, o que determinou síndrome de hipertensão superaguda, que levou o paciente à morte; o terceiro apresentava cisticerco isolado e livre do IV ventrículo mas, também, distúrbios mentais provavelmente decorrentes de cisticercose múltipla ou da meningoencefalite cisticercótica, motivo pelo qual a retirada do cisticerco curou a síndrome focal, mas persistiram, em evolução por

  4. Estimación del estrés parietal sistólico del ventrículo izquierdo por imagen de resonancia magnética: Una nueva aproximación al estudio de la poscarga

    OpenAIRE

    Cué Carpio,José Ramón; Meave, Aloha; Guadalajara Boo,José Fernando

    2005-01-01

    Objetivo: Determinar el estrés meridional parietal sistólico del ventrículo izquierdo por imagen de resonancia magnética en sujetos sanos. Material y métodos: Se estudiaron 21 sujetos sanos: 11 pertenecían al sexo masculino y 10 al femenino: su edad varió entre 26 y 31 años (29.33). Se les realizó el estudio de resonancia magnética de corazón utilizando el eje corto a nivel de los músculos papilares, de donde se obtuvieron las áreas epicárdicas y endocárdicas de la cavidad ventricular izquier...

  5. Ruptura da parede livre do ventrículo direito após infarto do miocárdio Rupture of the right ventricular free wall after myocardial infarction

    Directory of Open Access Journals (Sweden)

    Rômulo César Arnal Bonini

    2012-03-01

    Full Text Available Paciente de 75 anos, com ruptura da parede livre do ventrículo direito, corrigida com pontos de prolene 3.0 ancorados em tira de pericárdio bovino, promovendo o fechamento da ruptura. O paciente recebeu alta hospitalar no 59º dia de pós-operatório, em boas condições clínicas e laboratoriais.Patient 75, years-old, with free wall rupture of the right ventricle, corrected with prolene 3.0 points anchored in bovine pericardium patch, promoting the closure of the rupture. The patient was discharged on the 59th day after surgery in good clinical ans laboratorial conditions.

  6. Estimación del estrés parietal sistólico del ventrículo izquierdo por imagen de resonancia magnética: Una nueva aproximación al estudio de la poscarga

    OpenAIRE

    Cué Carpio,José Ramón; Meave,Aloha; Guadalajara Boo,José Fernando

    2005-01-01

    Objetivo: Determinar el estrés meridional parietal sistólico del ventrículo izquierdo por imagen de resonancia magnética en sujetos sanos. Material y métodos: Se estudiaron 21 sujetos sanos: 11 pertenecían al sexo masculino y 10 al femenino: su edad varió entre 26 y 31 años (29.33). Se les realizó el estudio de resonancia magnética de corazón utilizando el eje corto a nivel de los músculos papilares, de donde se obtuvieron las áreas epicárdicas y endocárdicas de la cavidad ventricular izquier...

  7. Efectos de la técnica de compresión del cuarto ventrículo y el protocolo craneosacro de diez pasos en un paciente pre hipertenso.

    OpenAIRE

    Botía Castillo, Paloma

    2011-01-01

    Introducción y objetivos: Diversas técnicas osteopáticas se han relacionado con la disminución de las cifras de presión arterial. El objetivo de este artículo fue describir la evolución de un paciente pre-hipertenso tratado con la técnica de compresión del cuarto ventrículo (CV4) y el protocolo craneosacro de diez pasos, para intentar disminuir las cifras de presión arterial. Caso Clínico: Hombre de 52 años de edad, no fumador, sin antecedentes de interés, que debutó c...

  8. Complicação de derivação ventrículo-peritoneal: hérnia inguinal com migração do cateter para o saco escrotal. Relato de caso

    OpenAIRE

    Henriques José Gilberto de Brito; Pinho Andréa Silva; Pianetti Geraldo

    2003-01-01

    A derivação ventrículo-peritoneal (DVP) com válvula é o método de tratamento mais usado para o controle da hidrocefalia. Suas complicações mais frequentes são o mal funcionamento do sistema e infecções. O desenvolvimento de hérnia inguinal ou hidrocele em pacientes com DVP é condição pouco frequente e a migração do cateter abdominal para o saco escrotal é raramente descrita. A patência do processo vaginal, o aumento da pressão intra-abdominal pelo líquor e a idade do paciente são alguns dos f...

  9. A constituição do sujeito na atividade estética da dança do ventre Constitution of subjectivity in the aesthetic activity of belly dance

    Directory of Open Access Journals (Sweden)

    Alice Casanova dos Reis

    2010-04-01

    Full Text Available O texto apresenta uma pesquisa cujo objetivo foi compreender de que modo a atividade estética da dança do ventre se concretiza e sua mediação na constituição do sujeito. Partindo de uma perspectiva histórico-cultural, a análise da entrevista com uma bailarina revelou diversas relações estéticas mediando a realização da dança: da bailarina com a técnica, com o corpo, com a música, com o público, com o sagrado, com o feminino. Compreendeu-se que nessas relações se engendram diferentes possibilidades de subjetivação, que convergem à constituição do sujeito como devir estético na dança do ventre.This text presents a research that aims to understand in which way the aesthetic activity of belly dance is concretized, and its mediation on the constitution of subjectivity. From a historical-cultural perspective, the analysis of an interview with a belly dancer revealed many aesthetic relations intervening the dance performance: how the belly dancer relates to the technique, to her body, to the music, to the public, to the sacred, to feminine conceptions. The text perceives that different possibilities of subjectivation are engendered through these relations, and converge in the constitution of the dancer as the aesthetic subject of the belly dance.

  10. Implantación transarterial de un electrodo de marcapaso permanente en ventrículo izquierdo, como complicación rara de esta cirugía

    Directory of Open Access Journals (Sweden)

    Yirleydis Desdin Hernández

    2015-11-01

    Full Text Available Se  presenta el caso de una mujer de 48 años de edad, que recibió hace más de cuatro  años un implante de marcapaso permanente (MPP por bloqueo AV de 3er grado, y que desde los inicios de esta  cirugía ha estado muy sintomática, con cuadros de mareos recurrentes y un accidente cerebro vascular tromboembólico. En el EKG de 12 derivaciones se encontró un hallazgo que llamó la atención, se trataba de complejos electro estimulados con morfología de bloqueo de rama derecha (BRD, esto hizo sospechar de que al no tener una gran dilatación del ventrículo derecho se trataba entonces de una implantación inadecuada del electrodo en el ventrículo izquierdo. Una radiografía  de tórax PA a distancia tele y lateral izquierda, así como un estudio de ecocardiografía bidimensional, confirmó la implantación del electrodo en el VI vía arteria subclavia derecha. La paciente se trató con anticoagulación, dada su negativa de retirarlo quirúrgicamente,  y desde entonces ha estado asintomática por alrededor de un año y con una función del MPP normal. Este hecho refleja la necesidad de realizar EKG de 12 derivaciones posoperatorio a todos los casos de implante de MPP, dado lo fácil que resulta resolver esta complicación en esta etapa, convirtiéndose después de los seis meses en un serio problema de solución quirúrgica, generalmente.

  11. Miocárdio não compactado de ventrículo esquerdo: relato de caso com estudo de necropsia Noncompaction of ventricular myocardium: case report with autopsy

    Directory of Open Access Journals (Sweden)

    Henrique Pott Junior

    2009-10-01

    Full Text Available O miocárdio não compactado de ventrículo esquerdo é cardiomiopatia genética em decorrência de uma anormalidade da morfogênese endomiocárdica. Quando presente, geralmente está associado a outras anomalias cardíacas congênitas, sendo raro seu achado isolado sem outras alterações estruturais cardíacas associadas. Desde seu primeiro relato em 1990, a não compactação do miocárdio vem sendo amplamente estudada a fim de se estabelecerem caráter genético, história natural, métodos de diagnóstico, repercussões hemodinâmicas e prognóstico. O objetivo deste estudo foi relatar um caso de miocárdio não compactado isolado de ventrículo esquerdo com estudo de necrópsia.Noncompaction of the ventricular myocardium is a genetic cardiomyopathy due to an alteration in endomyocardial morphogenesis. When present, it is commonly associated with other congenital cardiac diseases, whereas it is rare as an isolated finding without other associated cardiac structural alterations. Since its first report in 1990, the noncompaction of the ventricular myocardium has been widely studied in order to establish its genetic character, natural history, diagnostic methods, hemodynamic repercussions and prognosis. This study aims to report the case of an isolated noncompaction of the left ventricular myocardium with autopsy.

  12. Resultados de la intervención de Norwood en pacientes con síndrome de ventrículo izquierdo hipoplásico Results of Norwood's operation in patients with hypoplastic left heart syndrome

    Directory of Open Access Journals (Sweden)

    Miguel Ruz

    2009-04-01

    Full Text Available Introducción: el síndrome de ventrículo izquierdo hipoplásico, es una cardiopatía congénita compleja que requiere corrección quirúrgica en los primeros días de vida. El tratamiento es paliativo y el procedimiento de Norwood es la primera cirugía que se realiza. En esta intervención el ventrículo derecho es sistémico y la circulación pulmonar ocurre a través de una fístula sistémica-pulmonar o ventrículo-pulmonar. Objetivo: comunicar nuestra experiencia con la cirugía de Norwood en el tratamiento de los pacientes con diagnóstico de síndrome de ventrículo izquierdo hipoplásico. Métodos: estudio retrospectivo, observacional y descriptivo, en el cual se incluyen pacientes que ingresaron con diagnóstico de síndrome de ventrículo izquierdo hipoplásico y se llevaron a cirugía tipo Norwood entre diciembre de 2001 y octubre de 2007. Se clasificaron en dos grupos de acuerdo con el tipo de técnica utilizada; grupo I: fístula Blalock-Taussig, grupo II: conducto entre el ventrículo derecho y la arteria pulmonar. Resultados: se incluyeron 32 pacientes; 12 (37,5% pertenecieron al grupo I y 20 (62,5% al II. La distribución por géneros fue de 19 hombres (59,4% y 13 mujeres (40,6%. El promedio de días de vida al momento de la cirugía, fue de 14,7. Se detectaron 14 (43,7% pacientes con atresia aórtica y mitral. El promedio de tiempo en circulación extracorpórea fue de 192 minutos, con un rango de 95 a 310 minutos y la media de paro circulatorio fue de 60 minutos. El promedio de horas de ventilación mecánica fue de 153 y el cierre esternal se realizó en promedio a las 56 horas. La mortalidad en el grupo I fue de 83% y en el II de 50%, para una mortalidad global de 62% hasta 2006; para 2007 la mortalidad fue de 0%. Conclusiones: los avances actuales en técnicas de diagnóstico prenatal, tratamiento médico, intervención hemodinámica y técnicas quirúrgicas son prometedoras para mejorar la sobrevida de estos pacientes. En

  13. Frequência de disfunção diastólica do ventrículo esquerdo pelo doppler mitral em idosos sadios Frecuencia de disfunción diastólica del ventrículo izquierdo por Doppler mitral en adultos sanos Frequency of left ventricular diastolic dysfunction by mitral doppler in healthy elderly individuals

    Directory of Open Access Journals (Sweden)

    Luiz Sérgio Alves-Silva

    2009-10-01

    Full Text Available FUNDAMENTO: Idosos sadios frequentemente apresentam alterações nas velocidades do Doppler mitral, características de disfunção diastólica do ventrículo esquerdo (VE do tipo alteração do relaxamento. OBJETIVO: Determinar a frequência de disfunção diastólica do VE pelo Doppler mitral em idosos sadios e identificar características clínicas e ecocardiográficas associadas a esse achado. MÉTODOS: O total de 73 indivíduos aparentemente sadios e rigorosamente selecionados (64% de mulheres, com idade entre 60 e 80 anos, foram submetidos à avaliação clínica, laboratorial e Doppler-ecocardiográfica, com especial atenção às características do fluxo mitral. RESULTADOS: Encontramos 33 pacientes (45% com padrão diastólico do VE do tipo alteração do relaxamento (grupo 1, caracterizados pela relação entre as velocidades máximas das ondas do fluxo mitral (relação E/A 240 ms. Outros 40 pacientes (55% apresentaram padrão normal (grupo 2. O grupo/ 1 apresentou maior diâmetro da raiz da aorta (32,1±4,2 vs 30,3±3,3 mm; p=0,044 e intervalo PR mais longo (156±22 vs 139±23 ms; p=0,002. CONCLUSÃO: Uma grande proporção de indivíduos, com idade entre 60 e 80 anos, apresenta função diastólica normal pela análise Doppler-ecocardiográfica do fluxo mitral. Idosos sadios, portadores de disfunção diastólica do VE do tipo alteração do relaxamento, exibem maior diâmetro da raiz da aorta e intervalo PR mais longo.FUNDAMENTO: Los adultos mayores sanos presentan frecuentemente alteraciones en las velocidades del Doppler mitral, características de disfunción diastólica del ventrículo izquierdo (VI del tipo alteración de la relajación. OBJETIVO: Determinar la frecuencia de disfunción diastólica del VI por el Doppler mitral en adultos sanos, e identificar las características clínicas y ecocardiográficas asociadas a este hallazgo. MÉTODOS: El total de 73 individuos aparentemente sanos y rigurosamente seleccionados (el 64

  14. River nomads

    DEFF Research Database (Denmark)

    2016-01-01

    River nomads is a movie about people on the move. The documentary film explores the lifestyle of a group of nomadic fishermen whose mobility has been the recipe of success and troubles. Engaged in trade and travel, twice a year the river nomads form impressive convoys of majestic pirogues and set...... and liberated lifestyle and the breath-taking landscapes and vistas offered by the Niger River. River Nomads is also a personal account of the Kebbawa’s way of life and their current struggles as nomadic folk living in a world divided by borders and ruled by bureaucrats....

  15. Indian Tales of the Northern Rockies. Indian Culture Series.

    Science.gov (United States)

    Old Coyote, Sally; Toineeta, Joy Yellowtail

    Part of the Montana Council for Indian Education's Indian Culture Series, the book contains six folk stories recorded on reservations and by headstart teachers. The stories are: "The Owl", a Gros Ventre tale; "How the Robin Got a Red Breast", from the Flathead Tribe; "Old Man Coyote and the Wild Geese", a Crow Indian…

  16. MACROSCOPIC RIVERS

    NARCIS (Netherlands)

    VANDENBERG, IP

    1991-01-01

    We present a mathematical model for the ''river-phenomenon'': striking concentrations of trajectories of ordinary differential equations. This model of ''macroscopic rivers'' is formulated within nonstandard analysis, and stated in terms of macroscopes and singular perturbations. For a subclass, the

  17. Tratamento cirúrgico do abscesso aórtico com descontinuidade ventrículo esquerdo-aorta em endocardite infecciosa Surgical treatment of aortic abscess in infectious endocarditis

    Directory of Open Access Journals (Sweden)

    Antoninho Sanfins Arnoni

    1987-04-01

    Full Text Available A endocardite infecciosa é uma complicação séria, em pacientes portadores de valvopatias, e, algumas vezes, apresenta dificuldades técnicas para sua correção. Uma dessas situações diz respeito a disfunções de próteses colocadas em posição aórtica, ou de valvas naturais aórticas, em que a endocardite leva à descontinuidade entre o ventrículo esquerdo e a aorta, por comprometimento da continuidade mitroaórtica, ou do septo muscular. No Instituto Dante Pazzanese de Cardiologia, operamos 3 pacientes, nos quais havia abscesso em fundo cego, mas provocando grande separação entre o ventrículo esquerdo e a aorta e nos quais a fixação da prótese não poderia ser feita pelas técnicas habituais, nem pela suspensão do folheto anterior da mitral. Nesses casos, reconstruímos a continuidade entre o ventrículo esquerdo e a aorta, empregando retalho de pericárdio bovino e fixando a prótese, em parte, no anel valvar ainda preservado e, em parte, em um anel criado pelos pontos passados no pericárdio implantado. Um desses pacientes faleceu com 26 dias de pós-operatório, por embolia pulmonar, e com a prótese normal. Os 2 outros receberam alta e estão assintomáticos, com 14 e 4 meses de evolução. O último tem discreto refluxo aórtico, ao ecocardiograma.Infectious endocarditis is a serious complication in patients with valve diseases and sometimes presents technical difficulties for its treatment. One of those situations concerns prosthesis dysfunctions placed in aortic position or of natural aortic valves, in which endocarditis causes partial descontinuity between the left ventricle and the aorta by the lesion of the continuity of the mitral-aortic or of the muscular septum. In the Instituto Dante Pazzanese de Cardiologia we operated three patients with closed abscesses but with a great separation between the left ventricle and the aorta in which the fixation of the prosthesis couldn't be done by the usual technique nor by the

  18. Fourth ventricle computed tomography indexes: standardisation and characteristics in neurocysticercosis Índices do IV ventrículo em tomografia computadorizada de crânio: padronização e características na neurocisticercose

    Directory of Open Access Journals (Sweden)

    Svetlana Agapejev

    2002-06-01

    Full Text Available OBJECTIVES: to propose standardisation of fourth ventricle dimensions and to study its characteristics in neurocysticercosis. METHOD: a control group (CG constituted by 114 individuals with normal CT, and 80 patients with neurocysticercosis composed the group with neurocysticercosis (GN. Measures of the inner cranial diameter (Cr, fronto-polar distance between both lateral ventricles (FP, antero-posterior (AP and latero-lateral (LL fourth ventricle width based the standardisation of six indexes. RESULTS: AP/Cr, AP/LL and AP/FP were the more discriminative indexes, presenting in CG the mean values of 0.063, 0.267 and 0.582, respectively. The indexes in GN had values statistically higher than in CG. From GN, 51patients had increased indexes values above 2 standard deviation of the CG mean. AP/Ll was > or = 1 in 95% of patients with ventricular shunting and in 88% with depression. It also occurred in 73% patients with satisfactory follow-up and in everybody who died. CONCLUSION: AP/Cr, AP/LL and AP/FP may represent fourth ventricle dimensions.OBJETIVOS: propor padrão de normalidade das dimensões do IVventrículo e estudar suas características em neurocisticercose. MÉTODO: em um grupo controle (GC constituído de 114 indivíduos com tomografias normais e em outro grupo composto de 80 doentes com neurocisticercose (GN, mediram-se a distância fronto-polar de ventrículos laterais (FP e os diâmetros craniano interno (Cr, ântero-posterior (AP e látero-lateral (LL do IVº ventrículo para a padronização de seis índices. RESULTADOS: AP/Cr, AP/LL e AP/FP foram os índices mais discriminatórios e apresentaram, em GC, valores médios de 0,063, 0,267 e 0,582, respectivamente. Em GN os valores foram estatisticamente superiores a GC. Selecionaram-se 51 doentes do GN com índices > ou = 2 desvios-padrão da média em GC. Neles, AP/Ll foi > ou = 1 em 95% doentes com derivação liquórica e em 88% com depressão, ocorrendo em 73% com evolu

  19. Infección de la derivación ventrículo-peritoneal en recién nacidos con hidrocefalia Infection of ventriculoperitoneal shunt in newborns with hydrocephaly

    Directory of Open Access Journals (Sweden)

    Manuel Díaz Álvarez

    2008-09-01

    Full Text Available INTRODUCCIÓN. En los pacientes hidrocefálicos, la infección es una de las complicaciones más frecuentes de la derivación, y tiene elevada morbilidad y mortalidad. El objetivo de este trabajo fue identificar las características clínico-epidemiológicas de la infección de la derivación ventrículo-peritoneal en neonatos hidrocefálicos. MÉTODOS. Se determinaron indicadores de morbilidad y mortalidad, y se identificaron otras características de la infección de la derivación ventrículo-peritoneal en 74 neonatos hidrocefálicos, hospitalizados en el Servicio de Neonatología del Hospital Pediátrico Universitario «Juan Manuel Márquez» (1992 a 2005. RESULTADOS. Hubo 27/74 neonatos hidrocefálicos operados, con sistemas derivativos infectados (tasa del 36,5 %. En el 48,1 % de los casos, la infección fue causada por Staphylococcus aureus; no hubo diferencias significativas en cuanto al sexo, pero sí en cuanto a la estadía (p INTRODUCTION. In hydrocephalic patients, infection is one of the most frequent shunt complications and it presents an elevated morbidity and mortality. The purpose of this paper was to identify the clinical and epidemiologic characteristics of the infection of the ventriculoperitoneal shunt in hydrocephalic infants. METHODS. The indicators of morbidity and mortality were determined and others characteristics of the infection of the ventriculoperitoneal shunt were also identified in 74 hydrocephalic newborns admitted in the Neonatology Service of "Juán Manuel Márquez" Children University Hospital (1992-2005. RESULTS. There were 27/74 hydrocephalic newborn infants operated on with infected shunts (rate of 36.5 %. In 48.1 % of the cases, the infection was caused by Staphylococcus aureus; there were no significant differences as to sex, but they were remarkable as regards stay (p < 0,01. There were 4 deaths, 3 of them were infected (mortality was 5.4 x 100 operated on patients, and lethality was 11.1 x 100 infected

  20. Estudo histomorfométrico dos cardiomiócitos do ventrículo esquerdo das ratas albinas durante a prenhez Histomorphometrical study of cardiomyocytes of the left ventricular of albino rats during pregnancy

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    A.W. Liberatori Filho

    1999-07-01

    Full Text Available OBJETIVO. No presente estudo propusemo-nos a avaliar, por meio da microscopia de luz, os aspectos morfológicos e morfométricos dos cardiomiócitos do ventrículo esquerdo de ratas albinas durante a prenhez. MÉTODOS. Acasalamos doze ratas virgens que foram dividas ao acaso em quatro grupos, de acordo com a idade gestacional. Os animais correspondentes a cada grupo foram sacrificados ao 1o(G-A, 7o(G-B, 14o(G-C e 21o(G-D dias de prenhez, sendo coletados fragmentos do terço médio do ventrículo esquerdo, os quais após processamento apropriado, permitiram observação adequada à microscopia de luz. A cariometria foi realizada mensurando-se os diâmetros maiores e menores dos cardiomiócitos com o auxílio de um tambor rotativo modelo K 8 X adaptado a um microscópio de luz. RESULTADOS. O estudo em nível da microscopia de luz praticamente não mostrou alterações com o decorrer da prenhez. No entanto, a morfometria revelou que os volumes dos cardiomiócitos estão aumentados no 14o dia da prenhez, mostrando-se estatisticamente significante quando comparado aos demais grupos estudados. Assim, nossos resultados demonstraram haver hipertrofia ventricular esquerda durante a gestação. CONCLUSÃO. Durante a gestação há um processo dinâmico reversível de remodelação ventricular em conseqüência das alterações adaptativas gravídicas.PURPOSE. In the present study we evaluated, by light microscopy, and throughout morphometry, whether hypertrophy of cardiac striated muscular fibers of left ventricular occur in albino rat, during pregnancy. METHODS. After maiting, 12 nuliparous rats were divided into four groups with three animals for each group. The female rats corresponding to each group were killed at 1st, 7th, 14th and 21st days of pregnancy. RESULTS. Observation, on light microscopy (H.E had at one view, did not display any alterations during pregnancy. However, the morphometry revealed that nuclei of cardiomyocytes are augmented in

  1. Dinamismo econômico e batismos de ingênuos: a libertação do ventre da escrava em Casa Branca e Iguape, província de São Paulo (1871-1885

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    José Flávio Motta

    2008-01-01

    Full Text Available Estudamos os batismos de ingênuos registrados nas localidades paulistas de Iguape e Casa Branca entre 1871 e 1885. Nesse período, houve em Iguape o esmorecimento do dinamismo econômico assentado no cultivo de arroz destinado ao mercado interno. Já Casa Branca achava-se próxima à fronteira da expansão da lavoura cafeeira na província. Com a ênfase posta na comparação entre esses dois municípios, com vistas a explorar o condicionamento exercido por seus díspares panos de fundo econômicos, analisamos as características dos registros aludidos. Observamos a freqüência dos batizados no tempo, bem como computamos a distribuição, de acordo com a condição de legitimidade, das crianças nascidas de mães escravas após a promulgação da Lei do Ventre Livre. Acompanhamos o comportamento da defasagem temporal entre a data do nascimento e a do batismo. Avançamos, com fundamento em dois estudos de caso, um para cada uma das localidades selecionadas, algumas considerações acerca dos intervalos intergenésicos. Por fim, voltamos nossa atenção para a condição social de padrinhos e madrinhas. Mostraram-se muito expressivas, regra geral, as disparidades entre Iguape e Casa Branca.We study the baptisms of ingênuos registered in the localities of Iguape and Casa Branca, both in the province of São Paulo, in the period 1871-1885. Iguape, in those years, saw a slackening of the economic dynamism based on rice cultivation for the internal market. Casa Branca, on the other hand, was near the expansion frontier of coffee culture in the province. We emphasize the comparison between the characteristics of the registers of baptisms of ingênuos preserved for those two cities to explore the impact of their different economic contexts. We observe the frequency in time of the baptisms of children born of slave mothers after de promulgation of the Ventre-Livre Law. In addition, we compute the distribution of baptisms according to legitimacy

  2. Determinación del valor normal del índice de Tei del ventrículo izquierdo en caninos sanos Determination of the normal value of the left ventricular Tei index in healthy dogs

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    C. Lightowler

    2006-12-01

    Full Text Available Estudios recientes han demostrado que en la mayoría de los pacientes con insuficiencia cardiaca congestiva coexisten tanto alteración de la función sistólica como disfunción de la diastólica y, en muchos casos, la función sistólica se encuentra normal y la insuficiencia cardiaca esta sustentada solamente por la disfunción diastólica, hecho que tiene implicancias diagnósticas, terapéuticas y pronósticas. Recientemente, Tei y colaboradores propusieron un nuevo índice Doppler que permite el estudio combinado de algunos de los intervalos sistólicos y diastólicos. En base a estos antecedentes los autores determinaron el valor normal del índice de Tei para el ventrículo izquierdo en caninos sanos con el objeto de utilizar dicho valor como índice de la función sistodiatólica. Se obtuvo un valor medio de 0,372 con un desvío estándar de 0,04. Asimismo pudo verificarse que no existe correlación con la frecuencia cardiaca (P> 0,0975 ni con la tensión arterial sistólica (P> 0,0895 pero si con el acortamiento fraccional del ventrículo izquierdo (PRecent studies have showed that in the majority of the patients with congestive cardiac failure coexist alteration of systolic and diastolic function and in many cases the systolic function is normal and the cardiac failure this supported only by the diastolic dysfunction. This fact has therapeutic, diagnostic and prognostic implications. Recently, Tei and co-workers proposed a new Doppler index that permits the combined evaluation of some of the systolic and diastolic intervals. Supported by these antecedents the authors determined the normal value of the left ventricular Tei index in healthy dogs in order to evaluate the systodiatolic function. A mean value of 0,372 with a standard deviation of 0,04 was obtained. Likewise the authors could verified that not correlation exists with cardiac rate (P> 0,0975 neither with the systolic arterial pressure (P> 0,0895 but a significant correlation

  3. Anestesia para correção cirúrgica de blalock-taussig e implante de marca-passo em adulto portador de ventrículo único: relato de caso Anestesia para corrección quirúrgica de blalock-taussig e implante de marcapaso en adulto portador de ventrículo único: relato de caso Anesthesia for blalock-taussig shunt and pacemaker placement in an adult patient with univentricular heart: case report

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    Michelle Nacur Lorentz

    2008-06-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O ventrículo único é uma cardiopatia complexa rara e grave, sem possibilidade de tratamento cirúrgico curativo, associada à alta mortalidade durante a primeira infância. O objetivo desse artigo foi descrever um caso raro de paciente adulto com ventrículo único não-operado que se internou para realização de valvoplastia pulmonar via hemodinâmica e acabou sendo submetido à cirurgia de Blalock-Taussig modificado e implante de marca-passo epicárdico. Teve como objetivo complementar chamar a atenção para as particularidades anestésicas do paciente adulto portador de cardiopatia congênita não-corrigida. RELATO DO CASO: Paciente de 34 anos, 60 kg, portadora de cardiopatia congênita complexa tipo ventrículo único, estenose infundibulovalvar pulmonar importante e hipertensão pulmonar moderada. Admitida no hospital sem condições de correção cirúrgica e com história pregressa de várias sangrias terapêuticas para tratamento de policitemia. Foi internada devido a piora da hipoxemia, um episódio de síncope e bloqueio atrioventricular total (BAVT de início recente. À internação apresentava estabilidade hemodinâmica, freqüência cardíaca de 42 bpm, SpO2 de 73%, cianose central e de extremidades e pressão arterial de 120 × 70 mmHg. Foi proposta a realização de cateterismo e valvoplastia pulmonar via hemodinâmica. Por causa da impossibilidade de realização dessa técnica com sucesso, foi indicada a realização de cirurgia de Blalock-Taussig com implante de marca-passo. O procedimento foi realizado no dia seguinte sem intercorrências e a paciente teve alta hospitalar sete dias após o procedimento cirúrgico com SpO2 de 85%, hematócrito de 49% e melhora da dispnéia. CONCLUSÕES: O sucesso do procedimento anestésico para correção cirúrgica de cardiopatia congênita complexa demanda conhecimento da fisiopatologia da doença, bem como das particularidades inerentes à técnica anest

  4. Desempenho e características de carcaça do escargot francês (Helix aspersa maxima alimentado com rações contendo diferentes óleos vegetais Performance and carcass characteristics of “gros gris” (Helix aspersa maxima fed with different vegetable oils in diets

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    Carmino Hayashi

    2004-02-01

    Full Text Available Objetivando avaliar a utilização de óleos vegetais de diferentes origens em rações no desempenho e características de carcaça do escargot francês “gros gris” (Helix aspersa maxima, 240 animais com peso inicial médio de 0,11g, foram distribuídos em um delineamento inteiramente casualizado com seis tratamentos e quatro repetições com dez animais cada, em aquários de 12L. As rações foram formuladas de forma a diferirem quanto ao emprego (3 % da ração dos óleos de soja, canola, girassol, linhaça, arroz e milho. Os valores médios de peso final, conversão alimentar, taxa de eficiência protéica, rendimento de carcaça, percentagem de concha e taxa de sobrevivência dos animais alimentados com as rações com os diferentes óleos não diferiram (p>0,01 entre si. Os teores de umidade, cinza, proteína bruta e lipídeos totais e a relação ácidos graxos poliinsaturados/ácidos graxos saturados da porção comestível dos animais submetidos as diferentes rações não foram influenciados (p>0,05. Entretanto, os animais que receberam dieta com óleo de linhaça apresentaram o melhor (p0,05 nos teores de umidade e cinza das conchas dos animais submetidos às diferentes rações. Por outro lado, os animais que receberam óleo de linhaça tiveram concha com menor (pAiming to evaluate the use of different vegetable oil sources on performance and carcass characteristics of “gros gris” (Helix aspersa maxima diets, two hundred forty snails with initial average weight of 0.11g samples were distributed in an entirely randomized design with six treatments and four replications in twelve-liter aquaria. The diets were formulated to have differences on soybean, canola, sunflower, linseed, rice and corn oil inclusion at 3% of the diet. The average final weight, feed conversion, protein efficiency rate, carcass yields, percentage of shell and survival rates were not affected (p>0.01 by the use of different oils. The moisture, ash, crud

  5. Resincronización ventricular: nueva técnica y dispositivo para el implante endocavitario de un catéter en el ventrículo izquierdo

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    Jorge C. Trainini

    2010-01-01

    Full Text Available RESUMENLas dificultades inherentes a la técnica de implante de resincronizadores han generado lanecesidad de buscar nuevas opciones, como el implante endocavitario en el ventrículo izquierdopor vía transeptal auricular desde la aurícula derecha. En tal sentido, en los últimosaños ya se realizaron varias publicaciones. Si bien los resultados son satisfactorios, entodos los casos se utilizan técnicas “especiales”, que tienen sus dificultades propias y requierengran experiencia y una curva de aprendizaje por parte del operador. Es probableque ésta sea la razón por la cual estas técnicas no se “popularizaron”, pese a sus buenosresultados. El procedimiento que se describe en esta presentación pretende establecer unmétodo basado en técnicas de rutina en los laboratorios de electrofisiología de todo el mundoque permita un implante sencillo, efectivo, rápido y pasible de ser utilizado en formasegura con una curva de aprendizaje mínima.Básicamente, el procedimiento consiste en la introducción de un catéter endocavitario en elventrículo izquierdo a través de una punción transeptal convencional por la vena femoral ysu exteriorización por la vena subclavia (derecha o izquierda para completar el implante enforma convencional.REV ARGENT CARDIOL 2010;78:143-146.

  6. Complicação de derivação ventrículo-peritoneal: hérnia inguinal com migração do cateter para o saco escrotal. Relato de caso

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    Henriques José Gilberto de Brito

    2003-01-01

    Full Text Available A derivação ventrículo-peritoneal (DVP com válvula é o método de tratamento mais usado para o controle da hidrocefalia. Suas complicações mais frequentes são o mal funcionamento do sistema e infecções. O desenvolvimento de hérnia inguinal ou hidrocele em pacientes com DVP é condição pouco frequente e a migração do cateter abdominal para o saco escrotal é raramente descrita. A patência do processo vaginal, o aumento da pressão intra-abdominal pelo líquor e a idade do paciente são alguns dos fatores relacionados com a gênese deste tipo de complicação. Neste estudo é relatado caso de criança com hérnia inguino-escrotal desenvolvida após DVP com migração do cateter para o saco escrotal. São discutidas a revisão da literatura sobre o tema e a conduta a ser adotada.

  7. Disfunção do homoenxerto pulmonar utilizado na reconstrução do trato de saída do ventrículo direito Disfunción del homoinjerto pulmonar utilizado en la reconstrucción del tracto de salida del ventrículo derecho Dysfunction of the pulmonary homograft used in the reconstruction of the right ventricle exit tract

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    Andréa Weirich Lenzi

    2011-01-01

    Full Text Available FUNDAMENTO: O homoenxerto pulmonar tem sido utilizado como uma opção na correção de cardiopatia congênita com obstrução da via de saída do ventrículo direito. Os resultados em longo prazo, no entanto, mostram-se pouco satisfatórios. OBJETIVO: Identificar os fatores de risco associados à disfunção e à falência do homoenxerto pulmonar. MÉTODOS: Estudo em crianças submetidas à ampliação da via de saída do ventrículo direito com homoenxerto pulmonar. As variáveis clínicas, cirúrgicas, evolutivas e de aspectos morfológicos da prótese foram analisadas como fatores de risco. RESULTADOS: A amostra final de 75 pacientes com idade mediana na cirurgia de 22 meses, variando de 1-157 meses, apresentou 13 pacientes (17,0% que desenvolveram disfunção do homoenxerto, caracterizado por estenose ou insuficiência pulmonar grave. O tempo de ocorrência entre o implante do homoenxerto e a detecção da disfunção foi de 45 ± 20 meses. Quando o tamanho do homoenxerto foi menor de 21 mm e o escore Z da valva pulmonar foi menor do que zero, ou maior do que três, foram considerados fatores de risco para a ocorrência de disfunção. CONCLUSÃO: O homoenxerto pulmonar de tamanho menor do que 21 mm e a valva pulmonar inadequada para idade e peso do paciente são fatores determinantes para disfunção da prótese.FUNDAMENTO: El homoinjerto pulmonar ha sido utilizado como una opción en la corrección de cardiopatía congénita con obstrucción de la vía de salida del ventrículo derecho. Los resultados a largo plazo, mientras tanto, se muestran poco satisfactorios. OBJETIVO: Identificar los factores de riesgo asociados a la disfunción y a la falla del homoinjerto pulmonar. MÉTODOS: Estudio en niños sometidos a la ampliación de la vía de salida del ventrículo derecho con homoinjerto pulmonar. Las variables clínicas, quirúrgicas, evolutivas y de aspectos morfológicos de la prótesis fueron analizadas como factores de riesgo

  8. Treatment of colloid cysts of the third ventricle through neuroendoscopic Nd: YAG laser stereotaxis Tratamento do cisto colóide do terceiro ventrículo por neuroendoscopia estereotática com laser Nd: YAG

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    Fernando Campos Gomes Pinto

    2009-12-01

    Full Text Available OBJECTIVE: Colloid cysts (IIIVT CC are benign neuroepithelial cysts located in the anterior third ventricle. The authors propose the use of Nd:YAG laser stereotactic neuroendoscopic for guided resection of the third ventricle colloid cysts. METHOD: Eleven patients presented third ventricle colloid cysts and were treated by Nd:YAG laser guided with stereotactic endoscopy (n=7 , stereotactic endoscopy (n=3 or stereotactly guided puncture (n=1. The patients were followed prospectively (average 33 months, range 19-64 months. The clinical data, neuroimaging findings, hospitalization stay, outcomes and complications of the method were evaluated. RESULTS: All patients presented headache; six had papilledema, one had gait disturbance and one had third-nerve palsy. Neuroimaging showed hydrocephalus and a IIIVT CC with 14.4-mm mean diameter. After surgery all patients presented clinical and image improvement. Only two patients presented transient morbidities that were easily treated: One had diabetes insipidus that lasted for two days and was treated with a single dose of DDAVP, and another had chemical aseptic meningitis, probably due to the contact of the cyst content with the CSF. This patient was treated with antibiotics and corticosteroids with complete resolution of the problem without sequels. The other patients were discharged from the hospital 48 h after surgery. CONCLUSION: The stereotactic neuroendoscopy-guided procedure with Nd:YAG laser allowed the complete removal of the third ventricle colloid cysts, without definitive morbidities, sequels or recurrence of the lesion.OBJETIVO: Os cistos colóides (CC IIIVT são lesões neuroepiteliais benignas localizadas anteriormente no terceiro ventrículo. Nós propomos a ressecção neuroendoscópica com o uso do Nd:YAG laser guiada por estereotaxia. MÉTODO: Onze pacientes portadores de cisto colóide do terceiro ventrículo foram tratados por neuroendoscopia estereotática com laser Nd:YAG (n=7

  9. Mortalidade hospitalar na cirurgia de reconstrução da via de saída do ventrículo direito com homeonxerto pulmonar Hospital mortality in surgery for reconstruction outflow right ventricle with pulmonary homograft

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    Andrea Weirich Lenzi

    2010-03-01

    Full Text Available FUNDAMENTO: Mortalidade hospitalar na cirurgia de reconstrução da via de saída do ventrículo direito com homoenxerto pulmonar é variável. OBJETIVOS: Identificar os fatores de risco associados à mortalidade hospitalar e ao perfil clínico dos pacientes. MÉTODOS: Estudo de crianças submetidas à reconstrução da via de saída do ventrículo direito com homoenxerto pulmonar. Analisados como fatores de risco as variáveis clínicas, cirúrgicas e de aspectos morfológicos da prótese. RESULTADOS: Noventa e dois pacientes foram operados entre 1998 e 2005, apresentando principalmente atresia pulmonar com comunicação interventricular e a tetralogia de Fallot. Quarenta pacientes foram atendidos no primeiro mês de vida. Necessitaram de 38 cirurgias de Blalock Taussig devido à gravidade clínica. A idade mediana na cirurgia de correção total foi de 22 meses, variando de 1 mês a 157 meses. O tamanho homoenxerto pulmonar variou de 12 a 26 mm e o tempo de extracorpórea foi 132 ± 37 minutos. Após a cirurgia houve 17 óbitos (18% casos, em média 10,5 ± 7,5 dias após. A causa predominante foi falência de múltiplos órgãos. Na análise univariada entre os tipos de cardiopatia, estas deferiram na idade, momento da cirurgia, tamanho do homoenxerto, valor Z da valva pulmonar, tempo de circulação extracorpórea, manutenção da integridade do homoenxerto e alteração da árvore pulmonar. Não houve diferença estatística com relação à mortalidade hospitalar entre as variáveis e o tipo de cardiopatia. CONCLUSÃO: As cardiopatias obstrutivas do lado direito necessitam de atendimento cirúrgico nos primeiros dias de vida. A cirurgia de correção total apresenta risco de mortalidade de 18%, mas não houve associação com nenhuma variável estudada.BACKGROUND: Hospital mortality for surgical reconstruction of the outflow of the right ventricle with pulmonary homograft is variable. OBJECTIVES: To identify risk factors associated with

  10. Revisão dos critérios de Sokolow-Lyon-Rappaport e cornell para hipertrofia do ventrículo esquerdo Revision of the Sokolow-Lyon-Rappaport and cornell voltage criteria for left ventricular hypertrophy

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    Sérgio Lamêgo Rodrigues

    2008-01-01

    Full Text Available FUNDAMENTO: A hipertrofia do ventrículo esquerdo (HVE detectada pela eletrocardiografia é um forte preditor de morbidade e mortalidade cardiovasculares. OBJETIVO: Analisar o desempenho dos critérios de Sokolow-Lyon-Rappaport (SLR e de Cornell, em amostra populacional, em relação ao diagnóstico de HVE à ecocardiografia. MÉTODOS: Entre os 682 participantes da segunda fase do Projeto MONICA-OMS/Vitória, 641 foram avaliados por meio de eletrocardiografia e ecocardiografia. O subgrupo de indivíduos saudáveis (n = 269 foi usado para gerar valores de referência da massa do ventrículo esquerdo (MVE. As sensibilidades e especificidades dos critérios eletrocardiográficos foram determinadas pela curva ROC (receptor-operator characteristics em relação ao diagnóstico de HVE definido pelo critério ecocardiográfico interno (MVE > 48 g/m2,7 e 46 g/m2,7 para homens e mulheres, respectivamente. RESULTADOS: A prevalência de HVE à ecocardiografia foi de 23,7% na amostra global, em que havia 49% de hipertensos. O critério de Cornell apresentou melhor associação com a MVE estimada pela ecocardiografia (r = 0,37; p BACKGROUND: Electrocardiographically-detected left ventricular hypertrophy (LVH is a strong predictor of cardiovascular morbidity and mortality. OBJECTIVE: To assess the performance of the Sokolow-Lyon-Rappaport (SLR and Cornell voltage criteria in a population sample regarding the diagnosis of LVH on echocardiogram (ECHO. METHODS: A total of 641 out of the 682 participants of the second phase of the MONICA-Vitória project were assessed using electrocardiogram and echocardiogram. A subgroup of healthy individuals (n=269 was used to generate reference values of LV mass (LVM. Sensitivities and specificities of the electrocardiographic criteria were determined by the ROC (receptor-operator characteristics curve in relation to the diagnosis of LVH, as defined by the internal echocardiographic criterion (LVM > 48 and 46 g/m2.7 for males

  11. Fluoxetine effects on mitochondrial ultrastructure of right ventricle in rats exposed to cold stress Efeitos da fluoxetina sobre a ultraestrutura mitocondrial no ventrículo direito de ratos expostos ao estresse pelo frio

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    Fernanda V. Daud

    2009-06-01

    Full Text Available OBJECTIVE: To assess fluoxetine effects on mitochondrial structure of the right ventricle in rats exposed to cold stress. METHODS: The experimental study procedures were performed in 250-300g male EPM-Wistar rats. Rats (n=40 were divided into four groups: 1 Control group (CON; 2 Fluoxetine (FLU; 3 Induced hypothermia (IH and; 4 Induced hypothermia treated with fluoxetine (IHF. Animals of FLU group were treated by the administration of gavages containing 0.75 mg/kg/day fluoxetine during 40 days. The induced hypothermia was obtained by maintaining the groups 3 and 4 in a freezer at -8ºC for 4 hours. The animals were sacrificed and fragments of the right ventricle (RV were removed and processed prior to performing electron microscopic analysis. RESULTS: The ultrastructural changes in cardiomyocytes were quantified through the number of mitochondrial cristae pattern (cristolysis. The CON (3.85%, FLU (4.47% and IHF (8.4% groups showed a normal cellular structure aspect with preserved cardiomyocytes cytoarchitecture and continuous sarcoplasmic membrane integrity. On the other hand, the IH (34.4% group showed mitochondrial edema and lysis in cristae. CONCLUSION: The ultrastructural analysis revealed that fluoxetine strongly prevents mitochondrial cristolysis in rat heart, suggesting a protector effect under cold stress condition.OBJETIVO: Analisar os efeitos da fluoxetina sobre a estrutura mitocondrial do ventrículo direito de ratos expostos ao estresse pelo frio. MÉTODOS: Os procedimentos do estudo foram realizados em ratos Wistar-EPM (250-300g machos. Os ratos (n=40 foram divididos em quatro grupos: 1 Controle (CON; 2 Fluoxetina (FLU; 3 Induzidos à hipotermia (IH e; 4 Induzidos à hipotermia tratados com fluoxetina (IHF. O grupo FLU foi tratado com gavagem contendo 0,75 mg/kg/dia de fluoxetina durante 40 dias. O estresse induzido pelo frio foi realizado mantendo os grupos 3 e 4 em um freezer (-8ºC por quatro horas. Os animais foram sacrificados

  12. O diagnóstico da obstrução da via de saída do ventrículo esquerdo na cardiomiopatia hipertrófica

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    Beatriz Piva e Mattos

    2012-07-01

    Full Text Available A cardiomiopatia hipertrófica é uma doença genética prevalente caracterizada por hipertrofia ventricular esquerda, em que obstrução dinâmica da via de saída com geração de gradiente subaórtico incide em repouso em 30% dos casos. A obstrução é atribuida complexa interação entre o folheto anterior mitral, o septo interventricular e vetores anômalos de fluxo gerados no ventrículo esquerdo aliada a modificações na geometria da via de saída. Regurgitação mitral em grau variável é detectada associada ou não a deformidades estruturais do aparelho valvar. O ecocardiograma de esforço demonstra obstrução latente facilmente induzida por exercício em 60 a 75% das formas não obstrutivas. A determinação do gradiente nessas condições impõe-se na investigação de rotina dos pacientes com obstrução leve ou ausente em repouso. A avaliação da cardiomiopatia hipertrófica incorpora métodos de imagem baseados no ultrassom, os quais, adicionados ressonância magnética, possibilitam o reconhecimento de mecanismos geradores de obstrução ventricular, de modo a favorecer o diagnóstico e o manejo das formas obstrutivas e obstrutivas latentes.

  13. Gradiente ventriculo-lombar de concentração das proteínas totais do líquido cefalorraquiano: 2 - Influência da drenagem do LCR pela derivação ventrículo-atrial

    Directory of Open Access Journals (Sweden)

    Fernando Menezes Braga

    1983-09-01

    Full Text Available Em trabalho anterior, baseado no estudo comparativo do LCR cisternal e lombar de pacientes com neurocisticercose em atividade, com permeabilidade normal ou com bloqueio do espaço subaracnóideo espinhal, foi apresentada evidência de que o gradiente de concentração das proteínas ao longo do neuro-eixo tem sua origem na saída seletiva de água. Em prosseguimento a esse estudo foi feito este segundo trabalho apoiado nas observações de 11 pacientes com neurocisticercose, que apresentaram no decurso de sua doença hipertensão endocraniana grave que exigiu a derivação ventrículo-atrial do LCR para permitir a sobrevivência. Após a intervenção cirúrgica, foi observada uma melhoria surpreendente do quadro clínico. O exame do LCR lombar revelou aumento da taxa das proteínas totais na maioria dos pacientes, verificando-se valores muito elevados, quando comparados estes resultados com aqueles existentes antes da derivação ventrículo-atrial. Entretanto, neste segundo exame foi observada atenuação da reação inflamatória, revelada pela melhoria da modificação citológica. Este acréscimo da concentração das proteínas totais resultou muito provavelmente da menor movimentação do LCR no espaço subaracnóideo, como consequência do desvio para o sangue de grande parte do LCR produzido. A diminuição da intensidade da resposta imunitária e da reação inflamatória do sistema nervoso central, avaliada pelo exame de LCR feito depois da cirurgia, indica que a drenagem ventricular e a conseqüente normalização da pressão endocraniana permitiram uma melhoria evidente das condições encefálicas. Uma pesquisa bibliográfica especializada não revelou ter sido assinalada esta ocorrência de um acentuado aumento da taxa das proteínas totais no LCR subaracnóideo após a derivação ventrículo-atrial ou peritoneal, quer em pacientes com neurocisticercose, quer em pacientes com outros processos não tumorais que evoluem para o

  14. 33 CFR 161.45 - Vessel Traffic Service St. Marys River.

    Science.gov (United States)

    2010-07-01

    ...°57′ N. (De Tour Reef Light) to the south, to 46°38.7′ N. (Ile Parisienne Light) to the north, except... Parisienne Ile Parisienne Light 46°37.3′ N; 84°45.9′ W Downbound Only. 2 Gros Cap Reef Gros Cap Reefs Light 46°30.6′ N; 84°37.1′ W Upbound Only. 3 Round Island Round Island Light 32 46°26.9′ N; 84°31.7′W....

  15. A redução do gradiente na via de saída do ventrículo esquerdo pelo marcapasso DDD em pacientes com miocardiopatia hipertrófica obstrutiva

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    FAES Farid César

    2002-01-01

    Full Text Available OBJETIVO: A estimulação seqüencial atrioventricular (modo DDD tem sido aceita como uma terapêutica eficaz para reduzir o gradiente na via de saída do ventrículo esquerdo (GVSVE em pacientes com miocardiopatia hipertrófica obstrutiva (MHO. O objetivo deste trabalho é avaliar o efeito do marcapasso DDD para redução do GVSVE em pacientes com MHO de má resposta ao tratamento farmacológico e com obstrução na via de saída ventricular esquerda com gradiente crescente ou superior a 50 mmHg. MÉTODO: Um marcapasso de dupla câmara, composto de gerador de pulsos DDD e dos eletrodos atrial e ventricular, foi implantado mediante técnica transvenosa em 42 pacientes no período de fevereiro de 1995 a março de 2001. Foi observada uma redução na sintomatologia e uma melhora na classe funcional na maioria dos pacientes. RESULTADOS: Quanto à classe funcional, na última avaliação, 31 pacientes estavam em classe funcional I, e 10 pacientes na classe funcional II, contrastando com o pré-operatório, quando 30 pacientes estavam na classe funcional III ou IV, e apenas 12 estavam na classe II (p<0,001. A medicação foi ajustada, sendo reduzida ou suspensa em 15 pacientes, substituída em 3 pacientes e aumentada (quanto ao número de fármacos ou sua dose em 14 pacientes. O GVSVE reduziu significativamente de 96,50±30,55 mmHg para 41,80±22,84 mmHg após ajuste do aparelho (p<0,001. CONCLUSÃO: Após o implante do marcapasso DDD existe uma melhora clínica e ecocardiográfica em pacientes com MHO de má resposta ao tratamento clínico. Os resultados obtidos permitem a continuidade do uso da terapêutica em casos selecionados.

  16. Focus on ODA | Gros plan sur l’APD

    Directory of Open Access Journals (Sweden)

    2012-05-01

    Full Text Available Evolution of Selected DAC Members’ ODA, 1990–2010 (in percentage of GNIEvolution de l’APD d’une sélection de pays membres du CAD, 1990-2010 (en pourcentage du RNBSource: OECD, OECD.Stat Extracts, http://stats.oecd.org/Index.aspx.ODA by Donor Country | L’APD par pays donateurDAC Members’ Net ODA, 2010 (in million USDAPD nette des pays membres du CAD, 2010 (en millions USD­DAC Members’ Net ODA, 2010 (in percentage of GNIAPD nette des pays membres du CAD, 2010 (en pourcentage du RNBSource:...

  17. Järgmine on Euroopa eluasemeturg / Daniel Gros

    Index Scriptorium Estoniae

    Gros, Daniel

    2008-01-01

    Ilmunud ka: Den za Dnjom 22. veebr. lk. 26. USA kinnisvarakriis avaldab oma mõju ka Euroopale, kus kinnisvarahinnad on kümnendiga samuti järsult tõusnud. Tõenäoliselt järgneb sellele liialdusele mõningane alahindamine

  18. Zoom on India | Gros plan sur l’Inde

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    2012-05-01

    Full Text Available Indian Energy Production and Consumption (in Million Tonnes of Oil EquivalentProduction et consommation d’énergie en Inde (en millions de tonnes d’équivalent pétroleSource: World Bank, World Bank Development Indicators, 2010.Indian Oil, Gas and Coal Imports (in Million Tonnes of Oil Equivalent, 2008*Importations indiennes de pétrole, de gaz et de charbon (en millions de tonnes d’équivalent pétrole, 2008** 2009 for coal data | 2009 pour les données sur le charbon.Sources: British Petroleum...

  19. Avaliação quantitativa da movimentação parietal regional do ventrículo esquerdo na endomiocardiofibrose Quantitative assessment of left ventricular regional wall motion in endomyocardial fibrosis

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    Charles Mady

    2005-03-01

    Full Text Available OBJETIVO: Analisar a movimentação parietal regional do ventrículo esquerdo (VE em pacientes com endomiocardiofibrose (EMF. MÉTODOS: Estudados 88 pacientes, 59 do sexo feminino, com idade média de 39±13 anos (variação de 9 a 65 com evidência ecocardiográfica e angiográfica de EMF do VE. A intensidade da deposição de tecido fibroso na cineventriculografia contrastada foi classificada como discreta, moderada ou importante. A fração de ejeção global do ventrículo esquerdo (FEVE foi determinada pelo método área-comprimento por meio da ventriculografia. O movimento foi medido em 100 cordas eqüidistantes e perpendiculares à linha média desenhada no meio dos contornos diastólico e sistólico finais e normalizadas para o tamanho cardíaco. Analisaram-se cinco segmentos do VE: A - apical; AL - ântero-lateral; AB - ântero-basal; IA - ínfero-apical; IB - ínfero-basal. A anormalidade foi expressa em unidades de desvio padrão do movimento médio em uma população de referência normal, composta por 103 pacientes com VE normal, conforme dados de clínica, eletrocardiograma e padrões angiográficos. RESULTADOS: A FEVE média foi de 0,47±0,12. O envolvimento de tecido fibroso do VE foi discreto em 12 pacientes, moderado em 40 e importante em 36. As regiões com pior movimentação parietal foram A (-1,4±1,6 desvio-padrão/cordas e IA (-1,6±1,8 desvio-padrão/cordas comparadas com AB (-0,3±1,9 desvio-padrão /cordas, AL (-0,5±1,8 desvio-padrão/cordas e IB (-0,9±1,3 desvio-padrão/cordas. Não se observou relação entre a intensidade de envolvimento do tecido fibroso e a manutenção parietal regional. CONCLUSÃO : Existe alteração da movimentação parietal regional na EMF e é independente da intensidade de deposição de tecido fibroso avaliada qualitativamente. O envolvimento não uniforme do VE deve ser levado em conta no planejamento cirúrgico dessa doença.OBJECTIVE: To analyze left ventricular (LV regional wall

  20. Fração de ejeção e volumes do ventrículo esquerdo medidos com eco 3D e com tomografia ultra-rápida Fracción de eyección y volúmenes del ventrículo izquierdo medidos con eco- 3DTR y con tomografía ultrarrápida Left ventricular ejection fraction and volumes as measured by 3d echocardiography and ultrafast computed tomography

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    Marcelo Luiz Campos Vieira

    2009-04-01

    Full Text Available FUNDAMENTO: O ecocardiograma tridimensional em tempo real (ECO 3D e a tomografia computadorizada ultra-rápida (CT são dois novos métodos de análise da fração de ejeção e dos volumes do VE. OBJETIVO: Comparar as medidas da FEVE e dos volumes do VE aferidos pelo ECO 3D e pela CT ultra-rápida. MÉTODOS: Foram estudados pelo ECO 3D e pela CT ultra-rápida de 64 cortes, 39 pacientes consecutivos (27 homens, média etária de 57±12 anos. Foram analisados: FEVE e volumes do VE. Análise estatística: coeficiente de correlação (r: Pearson, teste de Bland & Altman, teste de regressão linear, 95 % IC, pFUNDAMENTO: La ecocardiografía tridimensional en tiempo real (Eco-3DTR y la tomografía computarizada ultrarrápida (TC ultrarrápida son dos nuevos métodos de análisis de la fracción de eyección (FE y de los volúmenes del ventrículo izquierdo (VI. OBJETIVO: Comparar las mediciones de la fracción de eyección del ventrículo izquierdo (FEVI y de los volúmenes del VI apurados por la Eco-3DTR y por la TC ultrarrápida. MÉTODOS: Se estudiaron, mediante la Eco-3DTR y la TC ultrarrápida de 64 cortes, a 39 pacientes consecutivos (27 varones, promedio de edad de 57±12 años. Se analizaron: FEVI y volúmenes del VI. Análisis estadístico: coeficiente de correlación (r: Pearson, prueba de Bland & Altman, prueba de regresión lineal, 95 % IC, pBACKGROUND: Real-time three-dimensional echocargiography (RT-3D-Echo and ultrafast computed tomography (CT are two novel methods for the analysis of LV ejection fraction and volumes. OBJECTIVE: To compare LVEF and volume measurements as obtained using RT-3D-Echo and ultrafast CT. METHODS: Thirty nine consecutive patients (27 men, mean age of 57±12 years were studied using RT-3D-Echo and 64-slice ultrafast CT. LVEF and LV volumes were analyzed. Statistical analysis: coefficient of correlation (r: Pearson, Bland-Altman analysis, linear regression analysis, 95% CI, p<0.05. RESULTS: RT-3D

  1. Preparo do ventrículo subpulmonar através de dois diferentes modelos ajustáveis de bandagem do tronco pulmonar: estudo experimental Preparation of the pulmonary ventricle for arterial switch operation using two adjustable devices for pulmonary trunk obstruction: an experimental study

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    Luiz Fernando CANÊO

    2001-03-01

    Full Text Available Dois modelos de dispositivos ajustáveis foram implantados em cabritos jovens, com o objetivo de avaliar suas capacidades de bandagem do tronco pulmonar (TP e eficiência no treinamento do ventrículo subpulmonar. Foram utilizados 3 grupos de 7 animais, submetidos ao implante de cateter balão (grupo I, implante de dispositivo de bandagem externa (grupo II e para obtenção dos pesos dos ventrículos direito (VD, esquerdo (VE e septo interventricular em condições normais (grupo controle. Os animais foram submetidos a ajustes progressivos dos dispositivos, a cada 24 horas, durante um período de 96 horas, avaliados através de monitorização hemodinâmica e ecocardiograma seriado. A hipertrofia ventricular foi avaliada através de parâmetros morfológicos e de microscopia óptica. Todos os animais concluíram o período de treinamento proposto. O gradiente VD-TP, a razão VD/VE e a pressão sistólica do VD foram significativamente maiores no grupo II (p0,05. O perímetro e a área dos miócitos mostraram um aumento significativo no final do treinamento, comparados à amostra retirada no momento do implante dos dispositivos. Observamos maior grau de estenose do TP com dispositivo de bandagem externa, porém ambos tiveram a capacidade e a eficiência de preparar o ventrículo subpulmonar.Two adjustable pulmonary artery banding devices were implanted in 14 young goats to evaluate their efficacy for the training of the pulmonary ventricle (right ventricle. An obstructing balloon catheter was placed in the lumen of the pulmonary artery in 7 animals (group I and other 7 animals (group II underwent implantation of an external pulmonary banding device. As a control group for septum, left and right ventricle weights a third group of 7 animals was used. Right ventricle (RV load was increased gradually, at 24 hours intervals, for 96 hours. RV muscle mass evolution was assessed by echocardiography and by optical microscopy. All animals completed the

  2. Miocardiopatia terminal com insuficiência mitral secundária: tratamento com implante de prótese e remodelamento interno do ventrículo esquerdo End stage cardiomyopathy and secondary mitral insufficiency: surgical alternative with prostesis implant and left ventricular remodelling

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    João Roberto Breda

    2006-09-01

    Full Text Available OBJETIVO: Analisar o resultado de uma alternativa operatória que envolve a correção da regurgitação mitral pelo implante de uma prótese de diâmetro menor do que o anel mitral e redução da esfericidade do ventrículo esquerdo com tração dos músculos papilares em direção ao anel, em portadores de miocardiopatia terminal e regurgitação mitral secundária. MÉTODO: Entre dezembro de 1995 e setembro de 2005, 116 pacientes foram operados com a técnica proposta. Os pacientes foram analisados de acordo com critérios clínicos, dados ecocardiográficos e aspectos morfológicos do ventrículo esquerdo. RESULTADOS: A mortalidade hospitalar foi 16,3% (19/116. O tempo médio de acompanhamento foi 38±16 meses. Após a alta hospitalar, a curva atuarial de sobrevida permaneceu estável com aceitável taxa de mortalidade tardia. Observou-se importante melhora clínica dos pacientes e de alguns parâmetros ecocardiográficos, especialmente redução da esfericidade do ventrículo esquerdo. CONCLUSÃO: Apesar da alta mortalidade operatória, a técnica apresentada representa uma alternativa aceitável no tratamento de portadores de miocardiopatia terminal com insuficiência cardíaca refratária associada à regurgitação mitral secundária.OBJECTIVE: To present a new surgical approach that consists of the implantation of a mitral prosthesis smaller than the annulus with traction of the papillary muscles to reduce the sphericalness of the left ventricle. METHODS: Between December 1995 and September 2005, 116 heart disease patients were operated, all of whom were at end-stage despite of full medication. The patients were analysed according to clinical criteria, echocardiographic findings and morphology of the left ventricle. RESULTS: Hospital mortality was 16.3% (19/116 and mid-term follow-up (38 ± 16 months showed evidence of improvement in the clinical status and some echocardiographic parameters, in particular reduction of the sphericalness

  3. Estudo experimental da aplicação do ventrículo artificial eletromecânico pulsátil implantável Experimental study of pulsatile implantable electromechanical artificial ventricle

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    Jarbas Jakson Dinkhuysen

    2011-03-01

    Full Text Available OBJETIVO: Apresentar os resultados da aplicação deste dispositivo em animais de experimentação, promovendo auxílio hemodinâmico apenas ao ventrículo esquerdo (VE. MÉTODOS: Entre junho 2002 e outubro 2009, foram implantados em 27 bezerros com idade 2½ a 4 meses e peso 80/100 kg e, por meio de anestesia geral e ventilação controlada e de toracotomia lateral esquerda, era introduzida cânula no ápice do VE e anastomose término/lateral de tubo vascular de politetrafluoretileno (PTFE com a porção descendente da aorta torácica, ambos interligados ao dispositivo implantado no subcutâneo abaixo do diafragma (24 e intratorácico (três. Em cinco bezerros, o dispositivo foi aplicado com auxílio de circulação extracorpórea (CEC e, em 22, sem CEC. RESULTADOS: Ocorreram dois óbitos durante o implante e três por causas diversas nas primeiras horas de pós-operatório (PO, sendo um relacionado ao dispositivo. A sobrevivência entre o 1º e 6º dia de PO ocorreu em 17 animais e entre o 8º e 31º dia de PO em cinco, com causas determinantes diversas, não só por problemas clínico/cirúrgicos, mas também relacionados ao dispositivo. O impacto hemodinâmico avaliado pela análise da pressão sistêmica mostrou incremento que variou de 20 a 40 mmHg e os dados laboratoriais analisados demonstraram baixos impactos traumáticos à crase sanguínea e boa biocompatibilidade. CONCLUSÃO: Trata-se de pesquisa árdua e complexa onde a cada experimento são identificados problemas não só de implantabilidade, mas também relacionados ao dispositivo, que vão sendo sistematicamente corrigidos, tornando-o cada vez mais seguro e eficaz.OBJECTIVE: The objective is to present the results of the application this device in experimental animals unloading only the left ventricle. METHODS: Between June 2002 and October 2009, were implanted in 27 calfs with age between 2½ to 4 months and 80 to 100 kg of weight, with general anaesthesia and controled

  4. Comportamento da função do ventrículo esquerdo a longo prazo no transplante cardíaco ortotópico Long-term behaviour of left ventricular function in ortothopic heart transplantation

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    Alfredo Inácio Fiorelli

    1993-06-01

    Full Text Available No InCór-FMUSP, no período de março de 1985 a fevereiro de 1993 (75 meses, 110 pacientes portadores de miocardiopatia terminal foram submetidos a transplante cardíaco ortotópico (TCO. Desta série, foram selecionados 24 pacientes, com sobrevida superior a 36 meses, para análise da função do ventrículo esquerdo (VE a longo prazo. O período de seguimento clínico esteve compreendido entre 36 meses e 78 meses (56 meses. A idade variou de 27 a 60 anos (44,3 anos, sendo 21 (87,5% do sexo masculino. As etiologias da doença cardíaca que motivaram a indicação dos transplantes foram: miocardiopatia dilatada em 13 (54,2% pacientes, isquémica em 8 (33,3% e chagásica em 3 (12,5%. Todos encontravamse, inicialmente, em classe funcional IV (NYHA. A cinecoronariografia e as variáveis hemodinâmicas e ecocardiográficas foram aferidas, no pós-operatório, anualmente até o quinto ano de evolução. Os resultados obtidos permitem concluir que: 1 o VE, em todos os casos, apresenta hipertrofia como mecanismo de adaptação; 2 a hipertensão arterial esteve presente desde o primeiro ano de evolução; 3 as rejeições agudas e a etiologia da miocardiopatia não interferiram na função do VE; 4 a aterosclerose acelerada exerce efeito negativo na função do VE; 5 do ponto de vista ecocardiográfico e hemodinâmico, a função do VE manteve-se estável até o quinto ano de evolução pós-operatória; o aparecimento de redução significativa do índice cardíaco (IC associado à incidência crescente de resultados anormais nas variáveis analisadas, sugere tendência à depressão tardia do seu desempenho.Ortothopic heart transplantation (OHT was performed in 110 patients at the Heart Institute, between march 1985 and february 1993 for treatment of terminal cardiomyopathy. From these patients, 24 had a survival period of more than 36 months and were selected for a long term analysis of the left ventricular function. They were observed in a 56

  5. Avaliação não invasiva das pressões de enchimento e remodelação do ventrículo esquerdo após infarto do miocárdio

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    Silvio Henrique Barberato

    2013-06-01

    Full Text Available FUNDAMENTO: A dilatação do ventrículo esquerdo (VE após infarto agudo do miocárdio (IAM é um importante determinante do prognóstico. A razão entre a velocidade diastólica E do fluxo mitral e a velocidade diastólica e' do anel mitral (relação E/e' é o melhor índice não invasivo para detectar elevação aguda da pressão de enchimento do VE. A hipótese deste estudo é que a E/e' possa predizer remodelação do VE após IAM tratado. OBJETIVO: Avaliar se a E/e' prediz remodelação ventricular após IAM, em comparação aos dados clínicos, laboratoriais e ecocardiográficos tradicionais. MÉTODO: Ecocardiogramas foram realizados em pacientes consecutivos com primeiro IAM, após angioplastia transluminal coronariana (ATC seguida de recanalização efetiva, 48 horas e 60 dias após o evento. A E/e' foi calculada pela média de quatro sítios do anel mitral. Remodelação do VE foi definida como aumento ≥ 15% do volume sistólico final ao método de Simpson. Análises estatísticas incluíram teste t de Student, curvas receptor-operador (ROC e regressão logística multivariada, com p significante < 0,05. RESULTADOS: Estudados 55 pacientes, com idade 58 ± 11 anos, 43 homens, observou-se E/e' maior (13 ± 4 versus 8,5 ± 2; p < 0,001 no grupo com remodelação (n = 13 em relação ao grupo sem remodelação (n = 42. A curva ROC indicou E/e' como preditor de remodelação (área sob a curva = 0,81, p = 0,001. Análises de regressão contendo variáveis clínicas, laboratoriais e Doppler-ecocardiográficas confirmaram E/e' como preditor independente da remodelação (odds ratio 1,42; p = 0,01. CONCLUSÃO: A relação E/e' é um preditor útil de remodelação do VE após IAM, indicando pacientes com maior risco cardiovascular.

  6. Correção cirúrgica do aneurisma de ventrículo esquerdo: comparação entre as técnicas de sutura linear e reconstrução geométrica

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    SGARBI Cássio José

    2000-01-01

    Full Text Available OBJETIVOS: Avaliar a evolução até 15 anos de acompanhamento dos pacientes submetidos a correção cirúrgica do aneurisma de ventrículo esquerdo, comparando as técnicas de sutura linear (RL e reconstrução geométrica(RG. CASUÍSTICA E MÉTODOS: Foram estudados 213 pacientes; destes, 166 (77,9% eram do sexo masculino. A idade média foi de 53,1 anos (DP= 9,9 anos, variando de 24 a 73 anos. Do total dos pacientes, 145 (68% foram operados pela técnica de SL e 68 (32% submetidos a RG de VE. A sobrevivência tardia foi medida com o auxílio do método de Kaplan - Meier. Também foram avaliadas a presença de trombo mural, a incidência de óbitos intra-hospitalares e a possibilidade de revascularização concomitante do miocárdio. As diferenças estatísticas (p valor foram medidas pelos métodos de "Log Rank" nas curvas atuariais de sobrevivência e pelo método de "Nonparametric Test" (teste de duas simples proporções nas demais comparações. RESULTADOS: O estudo atuarial após 10 anos de acompanhamento dos pacientes submetidos a SL e RG do VE revelou uma sobrevivência de 47,19% (EP=0,056 e de 63,55% (EP=0,068, respectivamente, não apresentando diferença significativa (p= 0,56. Nos dois grupos associados, a sobrevivência foi de 51,34% (EP=0,0473 com 10 anos e de 35,77% (EP=0,0648 com 15 anos de acompanhamento. A incidência de óbitos intra-hospitalares foi de 9,5% no primeiro grupo e de 16,6% no segundo, com p=0,17 e a retirada de trombos da cavidade ventricular esquerda foi de 31,72% e 44,12%, respectivamente, com p=0,07. Foram revascularizados 69% dos pacientes submetidos a SL e 85,3% dos submetidos a RG de VE. Demonstrou-se uma sobrevivência superior, em 10 anos de acompanhamento, para os pacientes revascularizados (p=0,008. CONCLUSÕES: Não houve diferença significativa na curva de sobrevivência dos pacientes comparando as técnicas de sutura linear e reconstrução geométrica de VE. Também foi demonstrado a superioridade

  7. Função diastólica do ventrículo esquerdo em obesos graves em pré-operatório para cirurgia bariátrica Left ventricular diastolic function in morbidly obese patients in the preoperative for bariatric surgery

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    Irlaneide da Silva Tavares

    2012-04-01

    Full Text Available FUNDAMENTO: Obesidade é uma doença crônica, multifatorial, associada a aumento do risco cardiovascular, especialmente a insuficiência cardíaca diastólica. OBJETIVO: Avaliar a função diastólica do ventrículo esquerdo em obesos graves em pré-operatório para cirurgia bariátrica, relacionando com os fatores de risco cardiovascular e a estrutura cardíaca. MÉTODOS: Trata-se de um estudo transversal, com 132 pacientes candidatos a cirurgia bariátrica, submetidos a avaliação ecocardiográfica transtorácica e dos fatores de risco cardiovascular, sendo: 97 mulheres (73,5%, idade média de 38,5 ± 10,5 anos e IMC de 43,7 ± 7,2 Kg/m². Foram divididos em três grupos: 61 com função diastólica normal, 24 com disfunção diastólica leve e 47 com disfunção diastólica moderada/grave, dos quais 41 com disfunção diastólica moderada (padrão pseudonormal e seis com disfunção diastólica grave (padrão restritivo. RESULTADOS: Hipertensão arterial sistêmica, idade e gênero foram diferentes nos grupos com disfunção diastólica. Os grupos com disfunção tiveram maior diâmetro do átrio esquerdo, do ventrículo esquerdo, volume do átrio esquerdo em quatro e duas câmaras, índice de volume atrial esquerdo e índice de massa do ventrículo esquerdo corrigido para a superfície corpórea e para altura. CONCLUSÃO: A elevada frequência de disfunção diastólica do ventrículo esquerdo na fase pré-clínica em obesos graves justifica a necessidade de uma avaliação ecocardiográfica criteriosa, com o objetivo de identificar indivíduos de maior risco, para que medidas de intervenção precoce sejam adotadas.BACKGROUND: Obesity is a chronic and multifactorial disease, associated with increased cardiovascular risk, especially diastolic heart failure. OBJECTIVE: To evaluate left ventricular diastolic function in morbidly obese patients in the pre-operative for bariatric surgery, correlating it with cardiovascular risk factors and

  8. Ressonância nuclear magnética no diagnóstico de pseudoaneurisma de ventrículo esquerdo. Antigo problema, nova opção Nuclear magnetic resonance imaging in the diagnosis of left ventricular pseudoaneurysm. An old problem, a new option

    Directory of Open Access Journals (Sweden)

    Glaura S. Alvarenga

    1997-10-01

    Full Text Available Paciente feminina, 67 anos, internada por infarto agudo do miocárdio de parede lateral, com edema agudo de pulmão e evolução para choque cardiogênico nas primeiras horas. Ecocardiograma transesofágico e ressonância nuclear magnética confirmaram o diagnóstico de pseudoaneurisma de ventrículo esquerdo. A paciente foi submetida a tratamento cirúrgico com sucesso.We describe the case of a 61 year-old female patient admitted to the hospital with acute lateral myocardial infarction, in pulmonary edema, who evolved to cardiogenic shock in the first hours. Transesophageal echodopplercardiogram and nuclear magnetic resonance imaging showed the diagnosis of a left ventricular pseudoaneurysm. Surgical repair was successfully undertaken.

  9. La cuantificación no invasiva del estrés parietal sistólico del ventrículo izquierdo en pacientes con insuficiencia cardíaca y su aplicación clínica

    OpenAIRE

    Guadalajara Boo,José Fernando; González Zárate,Jaime; Bucio Reta,Eduardo; Pérez, Patricia; Cué Carpio,Ramón José

    2007-01-01

    El objetivo de este trabajo es la cuantificación no invasiva del estrés parietal sistólico del ventrículo izquierdo por medio de ecocardiografía en pacientes con insuficiencia cardíaca por daño miocárdico intrínseco y establecer su semiología clínica al compararla con la insuficiencia cardíaca causada por sobrecarga hemodinámica, con pacientes en los que el corazón es funcionalmente normal, así como con otros pacientes en los que existe hipertrofia inapropiada con disfunción diastólica. Se es...

  10. La cuantificación no invasiva del estrés parietal sistólico del ventrículo izquierdo en pacientes con insuficiencia cardíaca y su aplicación clínica

    OpenAIRE

    Guadalajara Boo,José Fernando; González Zárate,Jaime; Bucio Reta,Eduardo; Pérez, Patricia; Cué Carpio,Ramón José

    2007-01-01

    El objetivo de este trabajo es la cuantificación no invasiva del estrés parietal sistólico del ventrículo izquierdo por medio de ecocardiografía en pacientes con insuficiencia cardíaca por daño miocárdico intrínseco y establecer su semiología clínica al compararla con la insuficiencia cardíaca causada por sobrecarga hemodinámica, con pacientes en los que el corazón es funcionalmente normal, así como con otros pacientes en los que existe hipertrofia inapropiada con disfunción diastólica. Se es...

  11. Divertículo congênito do ventrículo esquerdo associado a defeitos da parede tóraco-abdominal: relato de paciente operada em idade adulta Muscular diverticulum of the left ventricle associated with anomalies of the abdominal wall: report of an adult patient operated on

    Directory of Open Access Journals (Sweden)

    Roney Ronald Peixoto da Silva

    1992-03-01

    Full Text Available O divertículo congênito do ventrículo esquerdo é anomalia rara. Pode estar associado a defeitos da parede tóraco-abdominal e a lesões intracardíacas. Quando isto ocorre, recebe o nome de síndrome de Cantrell. É relatado o caso de paciente de 25 anos de idade submetida a tratamento cirúrgico.Muscular diverticulum of the left ventricle is a rare anomaly. It is frequently associated with other congenital anomalies of the abdominal wall, sternum, diaphragm, pericardium and the heart itself. These have been described as Cantrell syndrome. This paper reports a case of a 25-year-old female patient submitted to surgical repair of this syndrome.

  12. Avaliação da ação concomitante do balão intra-aórtico e da bomba centrífuga na assistência ao ventrículo esquerdo: estudo experimental em cães

    OpenAIRE

    PÊGO-FENANDES,Paulo M; FABRI Hélio A.; Moreira, Luiz Felipe P.; MAIZATO Marina Junko; LEIRNER,Adolfo A.; Sérgio Almeida de OLIVEIRA; Jatene,Adib D

    1998-01-01

    O tratamento da síndrome de baixo débito cardíaco tem evoluído muito, em especial em relação aos dispositivos mecânicos de assistência ventricular. Esses dispositivos podem genericamente ser agrupados em pulsáteis e não pulsáteis. Existe grande polêmica sobre as vantagens e desvantagens de cada um desses grupos de dispositivos. O objetivo deste trabalho é avaliar a ação da bomba centrífuga sobre o fluxo coronário e carotídeo na assistência circulatória do ventrículo esquerdo em cães com coraç...

  13. Complicação de derivação ventrículo-peritoneal: hérnia inguinal com migração do cateter para o saco escrotal. Relato de caso Complication of ventriculoperitoneal shunting: inguinal hernia with scrotal migration of catheter. Case report

    OpenAIRE

    José Gilberto de Brito Henriques; Andréa Silva Pinho; Geraldo Pianetti

    2003-01-01

    A derivação ventrículo-peritoneal (DVP) com válvula é o método de tratamento mais usado para o controle da hidrocefalia. Suas complicações mais frequentes são o mal funcionamento do sistema e infecções. O desenvolvimento de hérnia inguinal ou hidrocele em pacientes com DVP é condição pouco frequente e a migração do cateter abdominal para o saco escrotal é raramente descrita. A patência do processo vaginal, o aumento da pressão intra-abdominal pelo líquor e a idade do paciente são alguns dos f...

  14. Quantificação da massa infartada do ventrículo esquerdo pela ressonância magnética cardíaca: comparação entre a planimetria e o método de escore visual semi-quantitativo

    OpenAIRE

    Azevedo Filho,Clerio Francisco de; Hadlich,Marcelo; Petriz,João Luiz Fernandes; Mendonça,Luís Antonio; Moll Filho,Jorge Neval; Rochitte, Carlos Eduardo

    2004-01-01

    OBJETIVO: Validar um novo método de escore visual semi-quantitativo contra a planimetria digital quantitativa para a determinação da massa infartada do ventrículo esquerdo pela ressonância magnética cardíaca com técnica de realce tardio. MÉTODO: Estudados 77 pacientes com infarto miocárdico prévio em aparelho de ressonância magnética de 1,5T utilizando técnica de realce tardio para avaliação da viabilidade miocárdica e cálculo da massa infartada. Para avaliação da função ventricular esquerda ...

  15. River Morphology and River Channel Changes

    Institute of Scientific and Technical Information of China (English)

    CHANG Howard H

    2008-01-01

    River morphology has been a subject of great challenge to scientists and engineers who recognize that any effort with regard to river engineering must be based on a proper understanding of the morphological features involved and the responses to the imposed changes. In this paper,an overview of river morphology is presented from the geomorphic viewpoint. Included in the scope are the regime concept, river channel classification, thresholds in river morphology, and geomor-phic analysis of river responses. Analytical approach to river morphology based on the physical principles for the hydraulics of flow and sediment transport processes is also presented. The appli-cation of analytical river morphology is demonstrated by an example. Modeling is the modern tech-nique to determine both short-term and long-term river channel responses to any change in the en-vironment. The physical foundation of fluvial process-response must be applied in formatting a mathematical model. A brief introduction of the mathematical model FLUVIAL-12 is described.

  16. Late outcome of right ventricular outflow tract repair using bicuspid pulmonary prosthesis in tetralogy of Fallot surgery repair: case report Resultado tardio da reconstrução da via de saída do ventrículo direito com prótese pulmonar bicúspide na correção da tetralogia de Fallot: relato de caso

    Directory of Open Access Journals (Sweden)

    Miguel Angel Maluf

    2009-12-01

    Full Text Available We present a case of a 19 year-old female patient, with tetralogy of Fallot and hypoplastic pulmonary ring. Diagnosis was performed by echocardiography and cardiac catheterization. The surgical repair was performed at the age of 2 years old. A right ventricular outflow tract remodeling was performed using a porcine pulmonary bicuspid prosthesis. The patient presented a uneventful follow-up during 17 years. Postoperative assessment has shown: mild pulmonary insufficiency and mild pulmonary ventricle gradient, satisfactory right ventricular performance and prosthesis not presenting calcification. This is an option to correct the tetralogy of Fallot adopted by our Institution in the last two decades.É apresentado o caso de uma paciente de 19 anos de idade, sexo feminino, portadora de tetralogia de Fallot com anel pulmonar hipoplásico. O diagnóstico foi feito com ecoDopplercardiograma e cateterismo cardíaco. A correção cirúrgica foi realizada com 2 anos de idade. Para a reconstrução da valva pulmonar e via de saída do ventrículo foi utilizada prótese bivalvular pulmonar porcina. A paciente teve boa evolução clínica durante 17 anos. A avaliação pós-operatória demonstrou: discreta insuficiência pulmonar, discreto gradiente transvalvar pulmonar, desempenho do ventrículo direito preservado e prótese pulmonar sem calcificação. Esse é o procedimento adotado pela nossa Instituição para a correção da tetralogia de Fallot, nos últimos 20 anos.

  17. Qingjiang River Developer

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    THE 400-kilometer Qingjiang River, second tributary of the Yangtze River in Hubei Province, has a drainage area of 17,000 square kilometers. Its advantageous natural conditions have made it a key water power development project.

  18. Illinois River NWFR HMP

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Illinois River National Wildlife and Fish Refuges Complex stretches along 124 miles of the Illinois River in west central Illinois. The Complex includes three...

  19. Allegheny County Major Rivers

    Data.gov (United States)

    Allegheny County / City of Pittsburgh / Western PA Regional Data Center — This dataset contains locations of major rivers that flow through Allegheny County. These shapes have been taken from the Hydrology dataset. The Ohio River,...

  20. Iowa's Sovereign Meandered Rivers

    Data.gov (United States)

    Iowa State University GIS Support and Research Facility — This data set depicts Iowa's Meandered Rivers. These rivers are deemed sovereign land & therefore require any person wishing to conduct construction activities...

  1. Remodelamento do ventrículo esquerdo pela técnica da endoventriculoplastia com exclusão septal: experiência inicial Endoventricular circular patch plasty with septal exclusion: initial experience

    Directory of Open Access Journals (Sweden)

    Rui Manuel Sequeira de ALMEIDA

    2000-12-01

    Full Text Available OBJETIVO: Neste trabalho apresentam-se os resultados iniciais do tratamento cirúrgico de aneurismas anteriores do ventrículo esquerdo (Aneu VE, pela técnica de Dor, endoventriculoplastia circular, com exclusão septal, baseada nos conceitos de Hutchins & Bulkley, da geometria do VE e da sua reconstrução geométrica, e nos da operação da redução circular de Jatene. CASUÍSTICA E MÉTODO: No período de abril a outubro de 1999, foram realizados 6 procedimentos para a correção de Aneu VE, com a técnica de Dor. O tempo entre o infarto de parede anterior e a operação variou de 8 dias a 10 meses, sendo que 3 pacientes se encontravam na classe III, 2 na classe IV e 1 na classe I da NYHA. Quatro pacientes eram do sexo masculino e a idade média do grupo era de 58,3 anos. No estudo hemodinâmico pré-operatório, a fração de ejeção global variou de 27 a 46% (média de 37,2%, o volume sistólico final de VE de 64,4 a 135,3 ml (média de 107,9 ml e o volume diastólico final de VE de 132,9 a 236,4 ml (média de 183,8 ml. A operação foi associada à retirada de trombos do VE em 3 casos, a revascularização coronária concomitante em 5 casos, com o uso de 10 enxertos venosos e 3 arteriais (2,2 enxertos/paciente e uma endarterectomia. A parede anterior foi revascularizada em 9 casos e as paredes, lateral e inferior, em 2 cada. Os tempos médios de pinçamento aórtico e circulação extracorpórea foram, respectivamente, 44 e 110 minutos. RESULTADOS: O tempo médio de permanência hospitalar pós-operatória foi de 7,7 dias. Os pacientes foram seguidos de 5 a 31 semanas, sendo que todos se encontram na classe funcional I; em 3 casos o cateterismo cardíaco foi realizado e nos outros 3, um ecocardiograma bidimensional, para avaliação da fração de ejeção global, que variou de 42,5 a 60% (média de 49,4%, com melhora de 32,8% em relação à inicial. CONCLUSÃO: Diante destes resultados, pode-se considerar que esta seja mais uma t

  2. Emprego de condutos de pericárdio bovino na conexão ventrículo-arterial pulmonar: resultados tardios Late results with the use of a valved conduit ot bovine pericardium for ventricle to pulmonary artery connection

    Directory of Open Access Journals (Sweden)

    Fernando Antônio Fantini

    1996-09-01

    Full Text Available A reconstrução biventricuiar de uma série de cardiopatias congênitas requer a interposição de condutos valvados ventrículo-arteriais. Com o objetivo de analisar a evolução a longo prazo de um conduto de pericárdio bovino valvulado com bíoprótese porcina sem suporte tratado com glutaraldeído, foram revistos os prontuários de 33 pacientes operados de novembro de 1985 a outubro de 1995. A idade variou de 15 dias a 18 anos (média 5,7 ± 4,3 anos. A atresia pulmonar com comunicação interventricular (CIV foi a lesão mais freqüente (16 casos, seguida da síndrome da valva pulmonar ausente (5, truncus arteriosus (4, transposição das grandes artérias com CIV e estenose pulmonar (3 e outras (5. A mortalidade imediata foi de 18,2%, diretamente relacionada à condição pré-operatória. Vinte e três (70% pacientes foram acompanhados por períodos que variaram de 3 meses a 10 anos (média 4,8 ± 3,0 anos. A complicação mais freqüentemente observada no seguimento tardio foi a estenose da anastomose distai do conduto, presente em 17,4% (4/23 dos pacientes. Foram reoperados 3 (13% pacientes, sendo que 2 deles por estenose distal (p=0,02 e 1 por endocardite tardia do conduto. A mortalidade tardia foi de 17,4% (4/23, em 1 caso devido a estenose distai. A causa da estenose distal parece ser devida a retração tecidual na área de transição entre o pericárdio bovino e o tronco pulmonar. Em até 10 anos de seguimento não ocorreu calcificação significativa que prejudicasse a função tanto da valva quanto do conduto. Em conclusão, os condutos de pericárdio bovino apresentaram uma performance satisfatória como substitutos vasculares, não tendo ocorrido calcificação significativa da valva porcina ou das paredes do conduto no seguimento tardio. A incidência de estenose na anastomose distal parece estar mais relacionada a um fenômeno de retração tecidual do que a problemas técnicos.The biventricular repair of congenital heart

  3. Wild and scenic river reports: Alagnak River

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Alagnak and its major tributary the Novianuk River and their immediate surroundings possess the qualities necessary for inclusion in the National Wild and Scenic...

  4. A contribuição da dança do ventre para a educação corporal, saúde física e mental de mulheres que freqüentam uma academia de ginástica e dança La contribución de la danza del vientre para la educación corporal, salud física y mental de mujeres que van a la academia de gimnasia y danza The contribution of belly dance to body education, physical and mental health of women who go to the gym or dance

    OpenAIRE

    Ana Carla Peto Abrão; Luiz Jorge Pedrão

    2005-01-01

    O estudo teve por objetivo investigar os benefícios da dança do ventre para a saúde de mulheres que freqüentam uma academia de dança do interior do Estado de São Paulo. Trata-se de um estudo qualitativo. Os referenciais foram a experiência dos pesquisadores e outras literaturas da área de dança. A amostra foi constituída por 12 mulheres com faixa etária de 16 a 40 anos, que praticavam dança do ventre há mais de três meses, às quais foi aplicado um questionário com perguntas abertas. A análise...

  5. Yellow River, Cradle of China

    Institute of Scientific and Technical Information of China (English)

    1995-01-01

    THE Yellow River is the Mother River of China. In the hearts of the Chinese people, it is not just an ancient river measuring 4,845 kilometers long that passes through nine provinces and regions, but also a symbol. The poets say that the waterway is the image of ancient China. Thephilosophers say the river is the shadow of a dragon. The river

  6. 27 CFR 12.21 - List of examples of names by country.

    Science.gov (United States)

    2010-04-01

    ..., Granite Belt, Great Western, Hunter Valley, McLaren Vale, Mudgee, Murray River Valley, New South Wales..., Fixin, Gaillac, Gigondas, Givry, Gros Plant, Irouleguy, Jasnieres, Jurancon, Ladoix, L'Etoile, Limoux...

  7. Ruptura subaguda da parede livre do ventrículo esquerdo pós-infarto agudo do miocárdio: relato de caso e revisão de literatura Post-infarct sub-acute left ventricular free wall rupture: case report and review of the literature

    Directory of Open Access Journals (Sweden)

    Alexandre Siciliano Colafranceschi

    2006-03-01

    Full Text Available A ruptura da parede livre do ventrículo esquerdo é uma complicação potencialmente fatal e de tratamento essencialmente cirúrgico. A correção cirúrgica é o tratamento de escolha, mas o manejo pré-operatório e as técnicas de correção ainda não estão claramente definidos, sendo determinados conforme as condições clínicas do paciente. Há carência na literatura de grandes séries envolvendo este tipo de afecção e os relatos são baseados nas experiências individuais, com pequeno número de pacientes. São apresentados dois casos de ruptura subaguda da parede livre do ventrículo esquerdo como complicação da evolução do infarto agudo do miocárdio. Discute-se a abordagem cirúrgica completa, com revascularização miocárdica concomitante e a utilização de circulação extracorpórea. A opção de correção do defeito por meio da sutura epicárdica com retalho de pericárdio bovino e a revascularização completa do miocárdio, sobretudo sem circulação extracorpórea, parece ser a melhor estratégia para um grupo de pacientes que apresentam ruptura subaguda da parede livre do ventrículo esquerdo pós-infarto agudo do miocárdio.Post-infarction left ventricular free wall rupture is life threatening and not uncommon. Surgical experience is largely anecdotal with different techniques being used since the first successful surgical treatment was described. Here we present two patients with subacute left ventricular rupture that were managed using different perioperative strategies. Although the aim of surgical intervention is first and foremost to remove the threat to life by relieving of tamponade and closure of the ventricular defect, longer-term goals were those of conventional coronary operations, i.e., to prevent or limit the development of angina postoperatively and to improve the prognosis. These latter goals are controversial, and are discussed. The small number of patients involved prevent us to determine which

  8. "Ghost river": The Columbia

    OpenAIRE

    Gayton, D.

    2001-01-01

    Metadata only record This perspective piece examines the history and geography of the Columbia River and some current ecosystem management issues related to hydroelectric development on the river. Once the greatest salmon producer in the word, the Columbia has, according to the author, become a "ghost river," with its salmon runs reduced to remnants, and its ecological integrity hanging in the balance. The author suggests that British Columbians have much to lose, both biologically and cul...

  9. Down to the River

    DEFF Research Database (Denmark)

    Wessels, Josepha Ivanka

    2015-01-01

    Currently there is no coherent or sustainable water cooperation among the five states—Israel, Jordan, Lebanon, Palestinian territories and Syria—that share the Jordan River. Why do people not cooperate on sustainable river basin management, even if it seems the most rational course from...... to illustrate hydropolitics in praxis, because the political future of this particular area in many respects affects the sustainable future of the Jordan River Basin and the entire Levant....

  10. Investing in river health.

    Science.gov (United States)

    Bennett, J

    2002-01-01

    Rivers provide society with numerous returns. These relate to both the passive and extractive uses of the resources embodied in river environments. Some returns are manifest in the form of financial gains whilst others are non-monetary. For instance, rivers are a source of monetary income for those who harvest their fish. The water flowing in rivers is extracted for drinking and to water crops and livestock that in turn yield monetary profits. However, rivers are also the source of non-monetary values arising from biological diversity. People who use them for recreation (picnicking, swimming, boating) also receive non-monetary returns. The use of rivers to yield these returns has had negative consequences. With extraction for financial return has come diminished water quantity and quality. The result has been a diminished capacity of rivers to yield (non-extractive) environmental returns and to continue to provide extractive values. A river is like any other asset. With use, the value of an asset depreciates because its productivity declines. In order to maintain the productive capacity of their assets, managers put aside from their profits depreciation reserves that can be invested in the repair or replacement of those assets. Society now faces a situation in which its river assets have depreciated in terms of their capacity to provide monetary and non-monetary returns. An investment in river "repair" is required. But, investment means that society gives up something now in order to achieve some benefit in the future. Society thus has to grapple wih the choice between investing in river health and other investments--such as in hospitals, schools, defence etc. - as well as between investing in river health and current consumption--such as on clothes, food, cars etc. A commonly used aid for investment decision making in the public sector is benefit cost analysis. However, its usefulness in tackling the river investment problem is restricted because it requires all

  11. High-resolution electrocardiography in the diagnosis of arrhythmogenic right ventricular cardiomyopathy in Boxer dogs Eletrocardiografia de alta resolução no diagnóstico da cardiomiopatia arritmogênica do ventrículo direito em cães da raça Boxer

    Directory of Open Access Journals (Sweden)

    Evandro Zacché Pereira

    2013-06-01

    Full Text Available To evaluate the reliability of high-resolution electrocardiography in the diagnosis of arrhythmogenic right ventricular cardiomyopathy in Boxers, 20 dogs with no structural cardiac alterations at echocardiographic examination were grouped on the basis of frequency of ventricular arrhythmias, evaluated by 24-hour ambulatory ECG, and undergoing a high-resolution electrocardiography. High frequency QRS duration, duration of terminal QRS complex less than 40µV (LAS40 and root mean square voltage of the terminal 40 milliseconds of the QRS complex (RMS40 were measured. Differences in high-resolution ECG variables were not observed between groups. Therefore, the results of this investigation suggest that high-resolution electrocardiography is not a useful method for the diagnosis of arrhythmogenic right ventricular cardiomyopathy in Boxers without detectable myocardial alterations or systolic dysfunction.Com o objetivo de avaliar a importância da eletrocardiografia de alta resolução no diagnóstico da cardiomiopatia arritmogênica do ventrículo direito do Boxer, 20 cães sem evidências de doença cardíaca estrutural à avaliação ecodopplercardiográfica foram agrupados de acordo com a frequência de arritmias ventriculares, avaliadas pela eletrocardiografia ambulatorial de 24 horas, e submetidos ao exame eletrocardiográfico de alta resolução. Duração do complexo QRS filtrado, duração dos sinais de baixa amplitude (menor que 40µV dos últimos 40 milissegundos do complexo QRS e raiz quadrada média da voltagem ao quadrado dos últimos 40 milissegundos do complexo QRS (RMS40 foram as variáveis avaliadas. Não foram observadas diferenças significativas entre os grupos em relação às variáveis estudadas. Sendo assim, os resultados do presente estudo sugerem que a eletrocardiografia de alta resolução não é uma ferramenta útil no auxílio diagnóstico da cardiomiopatia arritmogênica do ventrículo direito dos cães da raça Boxer

  12. Obstrução da via de saída de ventrículo esquerdo por prótese mitral: apresentação de seis casos Obstruction of the left ventricle outlet by mitral valve prosthesis: report of six cases

    Directory of Open Access Journals (Sweden)

    Pablo M. A Pomerantzeff

    1990-08-01

    Full Text Available De janeiro de 1982 a março de 1984, foram implantadas 170 biopróteses de pericárdio bovino e alto perfil, no Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, com mortalidade hospitalar de 7,1%. Através do estudo anatomopatológico, foram identificados cinco casos em que ocorreu obstrução da via de saída do ventrículo esquerdo após substituição da valva mitral. Com base nessa experiência, a indicação de estudo hemodinâmico no 1º dia de pós-operatório em paciente em baixo débito, sem explicação, possibilitou identificar obstrução da via de saída do ventrículo esquerdo, com retroca valvar e boa evolução. Neste trabalho, são relatados detalhadamente os seis casos e discutidas as causas da obstrução da via de saída na substituição mitral.From January/1982 to March/1984, 170 high profile bovine pericardium bioprostheses were implanted in the INCOR (Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo (FMUSP. Hospital mortality amongst these patients was 7.1%. Anatomopathological studies identified five cases in which obstruction of the left ventricle outlet occurred after substitution of the mitral valve. Based on this experience, the indication of a hemodynamic study on the first postoperative day of a patient with an unexplained low cardiac output made it possible to identify obstruction of the left ventricle valve outlet in such patients, with resubstitution of the valve and a satisfactory evolution of the case. In this report we relate the six cases in detail and discuss the causes of the obstruction of the outlet in mitral valve substitutions.

  13. River Corridors (Jan 2, 2015)

    Data.gov (United States)

    Vermont Center for Geographic Information — River corridors are delineated to provide for the least erosive meandering and floodplain geometry toward which a river will evolve over time. River corridor maps...

  14. Modelling river dune development

    NARCIS (Netherlands)

    Paarlberg, Andries; Weerts, H.J.T.; Dohmen-Janssen, Catarine M.; Ritsema, I.L; Hulscher, Suzanne J.M.H.; van Os, A.G.; Termes, A.P.P.

    2005-01-01

    Since river dunes influence flow resistance, predictions of dune dimensions are required to make accurate water level predictions. A model approach to simulate developing river dunes is presented. The model is set-up to be appropriate, i.e. as simple as possible, but with sufficient accuracy for

  15. Tidal river dynamics

    NARCIS (Netherlands)

    Hoitink, A.J.F.; Jay, D.A.

    2016-01-01

    Tidal rivers are a vital and little studied nexus between physical oceanography and hydrology. It is only in the last few decades that substantial research efforts have been focused on the interactions of river discharge with tidal waves and storm surges into regions beyond the limit of salinity

  16. Reining the River

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Concerned about the effects of increasing water scarcity on economic development, China hopes a new law will save the Yellow River The first day of August marked what could be a new page in the history of China's long-suffering "mother river." That day, a regulation took effect that for the first time in histo-

  17. Reparo de rotura de ventrículo esquerdo após uso de tenecteplase no tratamento do infarto agudo do miocárdio Surgical repair of left ventricular rupture after the use of tenecteplase in the treatment of acute myocardium infarction

    Directory of Open Access Journals (Sweden)

    Marco Antonio Vieira Guedes

    2005-06-01

    Full Text Available A utilização do trombolítico no tratamento do infarto agudo do miocárdio apresentou um impacto importante na diminuição da mortalidade geral, porém não alterou a incidência da rotura cardíaca. Esta complicação deve ser reconhecida e tratada rapidamente, necessitando um alto nível de suspeição clínica. Os autores relatam um caso de reparo cirúrgico de rotura precoce de ventrículo esquerdo, após utilização de tenecteplase associado à heparina não fracionada, no tratamento do infarto agudo do miocárdio.The use of thrombolytic agents in the treatment of acute myocardium infaction represented an important impact in the reduction of overall mortality. But this did not alter the cardiac rupture rate. This complication must be recognized and treated quickly.The authors report on a case of surgical repair of an early left ventricle rupture, after the use of tenecteplase in association with non-fractioned heparin for the treatment of acute myocardium infarction

  18. Avaliação da ação concomitante do balão intra-aórtico e da bomba centrífuga na assistência ao ventrículo esquerdo: estudo experimental em cães

    Directory of Open Access Journals (Sweden)

    PÊGO-FENANDES Paulo M

    1998-01-01

    Full Text Available O tratamento da síndrome de baixo débito cardíaco tem evoluído muito, em especial em relação aos dispositivos mecânicos de assistência ventricular. Esses dispositivos podem genericamente ser agrupados em pulsáteis e não pulsáteis. Existe grande polêmica sobre as vantagens e desvantagens de cada um desses grupos de dispositivos. O objetivo deste trabalho é avaliar a ação da bomba centrífuga sobre o fluxo coronário e carotídeo na assistência circulatória do ventrículo esquerdo em cães com coração normal. Além disso, verificamos se o uso concomitante do balão intra-aórtico é suficiente para contrabalançar os possíveis efeitos deletérios da assistência circulatória com fluxo contínuo. Foram estudados 15 cães, com peso corpóreo médio de 16,3 kg. Realizamos a avaliação hemodinâmica dos animais, através da medida seriada das pressões do átrio direito, do capilar pulmonar, das artérias pulmonares, da circulação arterial sistêmica e a freqüência cardíaca. Foi realizada a aferição do débito cardíaco e calculados os seguintes parâmetros hemodinâmicos derivados: índice cardíaco, índice sistólico, resistência vascular sistêmica e resistência vascular pulmonar. O fluxo sangüíneo carotídeo e coronariano foram obtidos com o uso de transdutores eletromagnéticos. Os parâmetros foram analisados em quatro situações: S1. situação controle; S2. situação de teste da bomba centrífuga em que esse dispositivo realiza a assistência circulatória do ventrículo esquerdo; S3. situação de teste da bomba centrífuga e do balão intra-aórtico; S4. situação final em que é feita a contraprova desligando-se o balão intra-aórtico. A avaliação hemodinâmica através dos diversos parâmetros não mostrou alteração estatisticamente significante nas quatro situações. Já em relação ao fluxo coronário a utilização da assistência circulatória isolada com bomba centrífuga (S2 e S4 diminuiu

  19. Dupla via de saída do ventrículo direito com comunicação interventricular não relacionada: resultados da correção cirúrgica com técnica de múltiplos retalhos

    Directory of Open Access Journals (Sweden)

    Miguel BARBERO-MARCIAL

    1997-04-01

    Full Text Available Objetivo: Apresentar uma modificação técnica para a correção cirúrgica biventricular da dupla via de saída de ventrículo direito com comunicação interventricular não relacionada. Métodos: No período de abril de 1987 a fevereiro de 1996, 15 pacientes portadores desta anomalia foram submetidos à técnica de reconstrução biventricular com "tunelização" do ventrículo esquerdo para a aorta utilizando-se 2 ou mais retalhos de pericárdio bovino. A idade variou entre 2 a 13 anos (média = 4,8 anos; média = 5 anos. Treze pacientes apresentavam situs solitus e levocardia, 1 paciente situs inversus e dextrocardia e 1 paciente situs solitus e dextrocardia. A construção do túnel inicia-se no átrio direito. Sendo a CIV pequena ou restritiva, é feita a ampliação em sentido anterior e o primeiro retalho é suturado na borda póstero-inferior do defeito direcionando-o para o septo, em posição anterior e superior. A seguir, através de ventriculotomia direita o segundo, terceiro e, por vezes, o quarto retalhos são suturados direcionando o túnel para o anel aórtico. Resultados: Houve 3 óbitos (mortalidade de 20%, 2 hospitalares, 1 tardio e os 12 pacientes restantes foram seguidos por um período variável de 10 meses a 9 anos (média 33 meses encontrando-se todos em classe funcional I (NYHA. Comunicação interventricular residual, mínima, foi observada em 1 paciente, estenose pulmonar residual em 2 pacientes e insuficiência pulmonar em 1 paciente. Em nenhum dos pacientes demonstrou-se obstrução do túnel ventrículo esquerdo - aorta. Conclusão: Baseados nestes resultados, concluímos que esta técnica para reparo biventricular permite a construção de um túnel com diâmetro interno adequado, respeitando as mudanças de direção existentes entre a comunicação interventricular e a aorta. O túnel de pericárdio bovino ocupa menor espaço intraventricular causando, portanto, menor risco de obstrução da via de saída de

  20. Mackenzie River Delta, Canada

    Science.gov (United States)

    2007-01-01

    The Mackenzie River in the Northwest Territories, Canada, with its headstreams the Peace and Finley, is the longest river in North America at 4241 km, and drains an area of 1,805,000 square km. The large marshy delta provides habitat for migrating Snow Geese, Tundra Swans, Brant, and other waterfowl. The estuary is a calving area for Beluga whales. The Mackenzie (previously the Disappointment River) was named after Alexander Mackenzie who travelled the river while trying to reach the Pacific in 1789. The image was acquired on August 4, 2005, covers an area of 55.8 x 55.8 km, and is located at 68.6 degrees north latitude, 134.7 degrees west longitude. The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.

  1. Wild and Scenic Rivers

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — This map layer portrays the linear federally-owned land features (i.e., national parkways, wild and scenic rivers, etc.) of the United States, Puerto Rico, and the...

  2. Laminar laboratory rivers

    Science.gov (United States)

    Seizilles, Grégoire; Devauchelle, Olivier; Lajeunesse, Éric; Métivier, François

    2014-05-01

    A viscous fluid flowing over fine plastic grains spontaneously channelizes into a few centimeters-wide river. After reaching its equilibrium shape, this stable laboratory flume is able to carry a steady load of sediments, like many alluvial rivers. When the sediment discharge vanishes, the river size, shape and slope fit the threshold theory proposed by Glover and Florey (1951), which assumes that the Shields parameter is critical on the channel bed. As the sediment discharge is increased, the river widens and flattens. Surprisingly, the aspect ratio of its cross section depends on the sediment discharge only, regardless of the water discharge. We propose a theoretical interpretation of these findings based on the balance between gravity, which pulls particles towards the center of the channel, and the diffusion of bedload particles, which pushes them away from areas of intense bedload.

  3. Dulbi River goose survey

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — A survey of white-fronted goose (Anser albifrons) and Canada goose (Branta canadensis) broods was conducted on 58 3/8 miles of the Dulbi River in Alaska. Four...

  4. Skjern River Restoration Counterfactual

    DEFF Research Database (Denmark)

    Clemmensen, Thomas Juel

    2014-01-01

    In 2003 the Skjern River Restoration Project in Denmark was awarded the prestigious Europa Nostra Prize for ‘conserving the European cultural heritage’ (Danish Nature Agency 2005). In this case, however, it seems that the conservation of one cultural heritage came at the expense of another cultural...... of Dissonance in Nature Restoration’, Journal of Landscape Architecture 2/2014: 58-67. Danish Nature Agency (2005), Skjern Å: Ådalens historie. De store projekter. Det nye landskab og naturen. På tur i ådalen [The Skjern River: The History of the River Delta. The Big Projects. The New Landscape and Nature...... heritage. While the meanders of the Skjern River were reconstructed according to its assumed course in 1870s, the embanked canal, which was the main feature and symbol of a comprehensive cultivation project from the 1960s, was deconstructed and reduced to incomprehensible traces of the past. Not only did...

  5. The Carmans River Story

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — In this study, undertaken as an independent project at Bellport High School, the authors have attempted to provide a historical description of the Carmans River area...

  6. Russian River Analysis

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This document is an analysis and summary of progress toward achieving the interim management objectives for the Russian River during the 1979 season. Additionally,...

  7. Synthetic River Valleys

    Science.gov (United States)

    Brown, R.; Pasternack, G. B.

    2011-12-01

    The description of fluvial form has evolved from anecdotal descriptions to artistic renderings to 2D plots of cross section or longitudinal profiles and more recently 3D digital models. Synthetic river valleys, artificial 3D topographic models of river topography, have a plethora of potential applications in fluvial geomorphology, and the earth sciences in general, as well as in computer science and ecology. Synthetic river channels have existed implicitly since approximately the 1970s and can be simulated from a variety of approaches spanning the artistic and numerical. An objective method of synthesizing 3D stream topography based on reach scale attributes would be valuable for sizing 3D flumes in the physical and numerical realms, as initial input topography for morphodynamic models, stream restoration design, historical reconstruction, and mechanistic testing of interactions of channel geometric elements. Quite simply - simulation of synthetic channel geometry of prescribed conditions can allow systematic evaluation of the dominant relationships between river flow and geometry. A new model, the control curve method, is presented that uses hierarchically scaled parametric curves in over-lapping 2D planes to create synthetic river valleys. The approach is able to simulate 3D stream geometry from paired 2D descriptions and can allow experimental insight into form-process relationships in addition to visualizing past measurements of channel form that are limited to two dimension descriptions. Results are presented that illustrate the models ability to simulate fluvial topography representative of real world rivers as well as how channel geometric elements can be adjusted. The testing of synthetic river valleys would open up a wealth of knowledge as to why some 3D attributes of river channels are more prevalent than others as well as bridging the gap between the 2D descriptions that have dominated fluvial geomorphology the past century and modern, more complete, 3D

  8. Reconstituição da valva pulmonar e via de saída do ventrículo direito, com prótese bivalvular e prótese tubular valvada de tronco pulmonar de porco: estudo experimental e aplicação clínica Pulmonary valve and right ventricular oulet tract reconstruction with biovalvular prostheses and valved tubular prostheses of the pig pulmonary artery: experimental study and clinical application

    OpenAIRE

    Maluf,Miguel A; Verde,José L; João Carlos Leal; Roberto Catani; Herminio Vega Garcia Jr; Rubens Thevenard; Antonio C. Carvalho; Andrade, José L. [UNIFESP; Andrade, José Carlos S.; Braile,Domingo M.; Luiz Eduardo V Leão; Ênio Buffolo

    1993-01-01

    A obstrução da via de saída do ventrículo direito (VSVD) tem gerado muita polêmica em torno da técnica da sua correção cirúrgica, sendo a reconstituição ainda motivo de controvérsias. Com essa finalidade, foram desenvolvidas duas próteses a partir do tronco pulmonar (TP) de porco: 1) a prótese bivalvular: poderia ser usada na correção da tétrade de Faliot associada a hipoplasía do anel pulmonar: 2) a prótese tubular valvada, possuindo a própria valva pulmonar: poderia ser empregada na correçã...

  9. Circulação coronária dependente do ventrículo direito na atresia pulmonar com septo interventricular íntegro. Ausência da origem das artérias coronárias da aorta Right ventricle-dependent coronary circulation in pulmonary atresia with intact ventricular septum. Absence of origin of the coronary arteries from the aorta

    Directory of Open Access Journals (Sweden)

    Ivan Romero Rivera

    1998-08-01

    Full Text Available São descritos os aspectos clínicos, ecocardiográficos e angiográficos de um neonato de sexo masculino, com cinco dias de vida e diagnóstico de atresia pulmonar com septo interventricular íntegro. Tanto o ecocardiograma como a aortografia mostraram ausência da origem das artérias coronárias da aorta. O ecocardiograma bidimensional e, posteriormente, a ventriculografia direita identificaram as artérias coronárias, originando-se no ventrículo direito. Não houve contrastação retrógrada da aorta ou do tronco pulmonar quando contrastadas as artérias coronárias. Este é o primeiro caso relatado com diagnóstico ecocardiográfico pré angiografia, e é um exemplo da necessidade de se avaliar as artérias coronárias em pacientes com atresia pulmonar e septo ventricular íntegro.This report describes the clinical, echocardiographic and angiographic aspects of a five-day old boy with pulmonary atresia and intact ventricular septum. Both the echocardiogram and the aortography did not show any coronary arteries arising from the aorta. Two-dimensional echocardiography was able to identify the coronary arteries originating from the right ventricle and so did the right ventricular angiogram. No retrograde flow into the aorta or pulmonary trunk was identified after opacification of the coronary arteries. As far as we know this is the first case diagnosed by echocardiography, and is a vivid example of the necessity of identifying the coronary arteries in patients with pulmonary atresia and intact ventricular septum.

  10. Wind River: A Wild and Scenic River Analysis: Preliminary draft

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Wind River meets the criteria for inclusion in the National Wild and Scenic Rivers System. Subject to valid existing rights, the minerals in Federal lands which...

  11. Kisaralik River: A wild and scenic river analysis

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Kisaralik River from and including Kisaralik Lake to the west boundary of TSN, R65W meets the criteria established by the Wild and Scenic Rivers Act for...

  12. Study on the Reutilization of River Sediment

    Institute of Scientific and Technical Information of China (English)

    LIU Gui-yun; JIANG Pei-hua; XI Dan-li

    2002-01-01

    Main components and properties of river sediment are introduced. Secondary pollution of river sediments to the water quality of the river is clarified. The methods of the reutilization of river sediment are elucidated.

  13. Peso dos ventrículos cardíacos determinado em necropsia de indivíduos saudáveis mortos por causas externas Cardiac ventricular weights recorded at the autopsy of healthy subjects who died of external causes

    Directory of Open Access Journals (Sweden)

    Sérgio Lamêgo Rodrigues

    2007-11-01

    Full Text Available OBJETIVO: Determinar o peso dos ventrículos cardíacos em necropsia de indivíduos sadios vítimas de morte acidental, visando determinar padrões de normalidade em nossa população. MÉTODOS: Foram examinados 94 corações no Instituto Médico Legal de Vitória. Após remoção do coração e ressecção dos átrios e gordura epicárdica, os ventrículos direito (VD e esquerdo (VE, incluindo o septo, foram separados e pesados e a massa indexada pela altura. O teste de Kolmogorov-Smirnov foi usado para testar normalidade da distribuição. Os dados são apresentados como média ± desvio padrão. RESULTADOS: Após 12 exclusões (doença cardiovascular possível detectada após a morte foram analisados 82 corações (52 homens e 30 mulheres, 16-68 anos, média 31±12 anos. O peso do VE foi de 181±25 g e 125±15 g, do VD foi de 54±7 g e 38±6 g e a massa de VE indexada pela altura foi de 105±14 g/m e 78±8 g/m para homens e mulheres, respectivamente. O P95 do peso do VE foi de 218 g e 128 g/m em homens e 148 g e 88 g/m em mulheres. Não detectamos correlação significante entre a massa ventricular e idade. CONCLUSÃO: O peso do ventrículo esquerdo do coração dos homens da nossa amostra foi superior aos relatados na literatura contemporânea. Nossos resultados sugerem que a presença de hipertrofia de VE pode ser inferida em presença de massa de VE superior a 218 g ou 128 g/m nos homens e 148 g ou 88 g/m nas mulheres.OBJECTIVE:To establish cardiac ventricular weights recorded during the autopsy of healthy individuals who died of external causes, aiming at determining normality patterns in our population. METHODS:A total of 94 hearts were evaluated at the Forensics Department of the city of Vitória, Espírito Santo. After the heart removal and resection of the atria and epicardial fat, the right ventricle (RV and the left ventricle (LV, including the septum, were separated and weighed and the mass was indexed by the height. The Kolmogorov

  14. 50 CFR 226.205 - Critical habitat for Snake River sockeye salmon, Snake River fall chinook salmon, and Snake River...

    Science.gov (United States)

    2010-10-01

    ... 50 Wildlife and Fisheries 7 2010-10-01 2010-10-01 false Critical habitat for Snake River sockeye salmon, Snake River fall chinook salmon, and Snake River spring/summer chinook salmon. 226.205 Section... Snake River sockeye salmon, Snake River fall chinook salmon, and Snake River spring/summer...

  15. 33 CFR 207.380 - Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls. 207.380 Section 207.380 Navigation and Navigable... Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls. (a)...

  16. 33 CFR 117.734 - Navesink River (Swimming River).

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Navesink River (Swimming River). 117.734 Section 117.734 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY... (Swimming River). The Oceanic Bridge, mile 4.5, shall open on signal; except that, from December 1 through...

  17. The Nile River

    Science.gov (United States)

    2002-01-01

    This image of the northern portion of the Nile River was captured by MISR's nadir camera on January 30, 2001 (Terra orbit 5956). The Nile is the longest river in the world, extending for about 6700 kilometers from its headwaters in the highlands of eastern Africa. At the apex of the fertile Nile River Delta is the Egyptian capital city of Cairo. To the west are the Great Pyramids of Giza. North of here the Nile branches into two distributaries, the Rosetta to the west and the Damietta to the east. Also visible in this image is the Suez Canal, a shipping waterway connecting Port Said on the Mediterranean Sea with the Gulf of Suez. The Gulf is an arm of the Red Sea, and is located on the righthand side of the picture. Image credit: NASA/GSFC/LaRC/JPL, MISR Team.

  18. Haw River PFCs Data Set

    Data.gov (United States)

    U.S. Environmental Protection Agency — PFAS concentrations in river and drinking water in and around the Haw River in North Carolina. This dataset is associated with the following publication: Sun, M., E....

  19. Sprague River Oregon Bars 1968

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  20. Sprague River Oregon Floodplain Boundary

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  1. Missouri River 1943 Compact Line

    Data.gov (United States)

    Iowa State University GIS Support and Research Facility — Flood Control, Bank Stabilization and development of a navigational channel on the Missouri River had a great impact on the river and adjacent lands. The new...

  2. Sprague River Oregon Floodplain 2000

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the...

  3. The River Lune fact file

    OpenAIRE

    1994-01-01

    This document provides a brief introduction to the River Lune catchment and the role that the National Rivers Authority plays in catchment management. Included are a map of the catchment and short introductions to fisheries and characteristics of the catchment.

  4. Sprague River Oregon Centerline 2000

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  5. Sprague River Oregon Centerline 1940

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  6. Sprague River Oregon Water 1940

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  7. Sprague River Oregon Water 1968

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  8. Sprague River Oregon Floodplain 1968

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  9. Sprague River Oregon Bars 2000

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the...

  10. Sprague River Oregon Bars 1940

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  11. Sprague River Oregon Centerline 1975

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  12. Sprague River Oregon Centerline 2005

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  13. Sprague River Oregon Floodplain Centerline

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  14. Two Pontic rivers

    DEFF Research Database (Denmark)

    Bekker-Nielsen, Tønnes; Jensen, Marit

    2015-01-01

    The accounts of the landscape around the Iris (Yeşilirmak) and the Thermodon (Terme) given by ancient authors are diverse and often contradictory. The Periegesis of the World by Dionysius of Alexandria, a didactic poem written in the early IInd c. A.D., established an image of the two rivers...... that does not correspond to their actual characteristics. A closer study reveals that Dionysius, or possibly his source, has confused the two: the river which he describes as the Thermodon is in fact the Iris, and vice versa. This mistake was not realized by later translators (Avienus, late IVth c. A...

  15. Nowitna River goose survey, 1986

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — An aerial goose survey of the upper Nowitna River and a river-floating goose brood survey of the upper Nowitna River were conducted May 27th through July 5th of...

  16. The Gediz River fluvial archive

    NARCIS (Netherlands)

    Maddy, D.; Veldkamp, A.; Demir, T.; Gorp, van W.; Wijbrans, J.R.; Hinsbergen, van D.J.J.; Dekkers, M.J.; Schreve, D.; Schoorl, J.M.; Scaife, R.

    2016-01-01

    The Gediz River, one of the principal rivers of Western Anatolia, has an extensive Pleistocene fluvial archive that potentially offers a unique window into fluvial system behaviour on the western margins of Asia during the Quaternary. In this paper we review our work on the Quaternary Gediz River

  17. Ecological River Basin Management.

    Science.gov (United States)

    Smith, Anthony Wayne

    Addressing the Seventh American Water Resources Conference, Washington, D. C., October, 1971, Anthony Wayne Smith, President, National Parks and Conservation Association, presents an expose on how rivers should be managed by methods which restores and preserve the natural life balances of the localities and regions through which they flow. The…

  18. Stepping in the river

    Directory of Open Access Journals (Sweden)

    Julie Kearney

    2016-11-01

    Full Text Available 'Stepping in the River' is about the cultural misunderstandings and small betrayals that arise when First World tourists visit Third World countries. It is also about the enduring love that people in these countries can inspire, imperfect though that love may be.

  19. Hood River Production Master Plan.

    Energy Technology Data Exchange (ETDEWEB)

    O' Toole, Patty

    1991-07-01

    The Northwest Power Planning Council's 1987 Columbia River Fish and Wildlife Program authorizes the development of artificial production facilities to raise chinook salmon and steelhead for enhancement in the Hood, Umatilla, Walla Walla, Grande Ronde and Imnaha rivers and elsewhere. On February 26, 1991 the Council agreed to disaggregate Hood River from the Northeast Oregon Hatchery Project, and instead, link the Hood River Master Plan (now the Hood River Production Plan) to the Pelton Ladder Project (Pelton Ladder Master Plan 1991).

  20. Ultrastructural alterations of choroid plexuses of lateral ventricles of rats (Rattus norvegicus submitted to experimental chronic alcoholism Alterações ultraestruturais dos plexos coróides dos ventrículos laterais de ratos (Rattus norvegicus submetidos a alcoolismo crônico experimental

    Directory of Open Access Journals (Sweden)

    LUÍS FERNANDO TIRAPELLI

    2000-03-01

    Full Text Available Adult male rats (Wistar lineage were alcoholized with sugar cane liquor diluted at 30(0 GL during 300 days and sacrificed every 60 days in 5 stages. Samples of choroid plexuses of lateral ventricles were collected and examined at transmission electronic microscope to detect possible ultrastructural alterations and to raise possible pathological correlations. Gradual changes were observed in these animals during all the experiment: dilatation and enlargement of cisternae of Golgi complex, dilatation of RER, presence of digestive vacuoles and a large amount of pinocytic vesicles as well as vesicles with electronlucent content throughout cytoplasm, as well as an enlargement of intercellular space between basolateral interdigitation of the cells and of the connective tissue. The changes observed in the epithelium and connective tissue of choroid plexuses specially in 240 and 300 days of treatment are presumably due to a disturbance in hydroelectrolitic homeostasis, contributing to several morpho-functional disturbs of central nervous system. No changes were observed in the control group animals.Ratos machos adultos (linhagem Wistar foram alcoolizados com aguardente de cana diluída a 30(0 GL durante 300 dias e sacrificados a cada 60 dias em 5 etapas. Amostras dos plexos coróides dos ventrículos laterais foram coletadas e examinadas ao microscópio eletrônico de transmissão para detectar possíveis alterações ultraestruturais e suas correlações patológicas. Alterações graduais foram observadas nestes animais durante todo o experimento: dilatação e aumento das cisternas de complexo de Golgi, dilatação do retículo endoplasmático rugoso, presença de vacúolos digestivos e grande quantidade de vesículas pinocíticas assim como de vesículas de conteúdo elétron-lúcido por todo o citoplasma, além de aumento do espaço intercelular, entre as interdigitações das células assim como no tecido conjuntivo. As alterações observadas no

  1. Bandagem reversível do tronco pulmonar IV: análise da hipertrofia aguda do ventrículo direito em modelo experimental de sobrecarga intermitente IV Pulmonary trunk reversible banding: analysis of right ventricle acute hypertrophy in an intermittent loading experimental model

    Directory of Open Access Journals (Sweden)

    Acrisio Sales Valente

    2008-03-01

    Full Text Available OBJETIVO: A bandagem ajustável do tronco pulmonar (TP pode proporcionar treinamento ventricular mais fisiológico para cirurgia de Jatene em dois estágios. Este estudo experimental analisa a hipertrofia aguda (96 horas do ventrículo direito (VD submetido à sobrecarga sistólica intermitente. MÉTODOS: Cinco grupos de sete cabritos jovens foram dispostos conforme o tempo de sobrecarga sistólica do VD (0, 24, 48, 72 e 96 horas. O grupo zero hora funcionou como grupo controle. Avaliações ecocardiográficas e hemodinâmicas foram feitas diariamente. Os animais foram sacrificados para avaliação do conteúdo de água e pesagem das massas cardíacas. RESULTADOS: Houve aumento da espessura do VD a partir de 48 horas de treinamento (pOBJECTIVES: Adjustable pulmonary trunk (PT banding device may induce a more physiologic ventricle retraining for the two-stage Jatene operation. This experimental study evaluates the acute hypertrophy (96 hours of the right ventricle (RV submitted to an intermittent pressure overload. METHODS: Five groups of seven young goats were distributed according to RV intermittent systolic overload duration (0, 24, 48, 72 and 96 hours. The zero-hour group served as a control group. Echocardiographic and hemodynamic evaluations were performed daily. After completing the training program for each group, the animals were sacrificed for water content and cardiac masses evaluation. RESULTS: There was a significant increase in RV free wall thickness starting with the 48-hour group (p<0.05. However, a decreased RV ejection fraction, associated with an important RV dilation and a significant increase in the RV volume to mass ratio was observed at 24-hour training period, when compared to 96-hour period (p=0.003, with subsequent recovery throughout the protocol. A 104.7% increase in RV mass was observed in the 96-hour group, as compared to the control group, with no differences in water content between these two groups. The daily mean

  2. Bandagem ajustável do tronco pulmonar: comparação de dois métodos de hipertrofia aguda do ventrículo subpulmonar Adjustable pulmonary trunk banding: comparison of two methods of acute subpulmonary ventricle hypertrophy

    Directory of Open Access Journals (Sweden)

    Renato Samy Assad

    2006-12-01

    Full Text Available OBJETIVO: Este estudo compara a sobrecarga contínua versus intermitente do ventrículo direito (VD de cabritos, para induzir a hipertrofia ventricular. MÉTODO: Foram utilizados três grupos de sete cabritos jovens (controle, contínuo, intermitente. A sobrecarga sistólica foi imposta por 96 horas, no contínuo e por quatro períodos de 12 horas, alternados com 12 horas de descanso, no intermitente. Avaliações ecocardiográficas e hemodinâmicas foram feitas diariamente. Os animais foram, então, mortos para avaliar o conteúdo de água e peso das massas cardíacas. RESULTADOS: O Intermitente mostrou aumento dos pesos de VD e de septo, em relação ao controle (pOBJECTIVE: This study compares ventricular hypertrophy induced by continuous versus intermittent systolic overload of the pulmonary ventricle (RV of young goats. METHODS: Three groups of seven goats were used (control, continuous, and intermittent. Systolic overload was maintained for 96 hours in the continuous group, while the intermittent group suffered four 12-hour periods of systolic overload, alternating with 12-hour resting periods. Echocardiographic and hemodynamic evaluations were performed every day. The animals were then killed for myocardial water content and weight evaluation. RESULTS: Both study groups achieved significant increases in RV mass (p<0.05. However, significant increases of the septum mass were observed only in the Intermittent Group (p<0.05. A greater increase in the RV wall thickness was observed in the Intermittent Group (p<0.05. There was a significant difference in RV diastolic volume between the two groups (p= 0.01, with a greater RV dilation in the Continuous Group after 24 hours of continuous overload (p< 0.03. In both groups, the RV ejection fraction was maintained within the normal range throughout the protocol. A smaller RV perimeter was observed in the Intermittent Group after 96 hours of systolic overload (p<0.05. There was no significant

  3. Comparative Study of Flood Risk Management and Land Use in the Deltas of Rhine River, Yellow River and Mississippi River

    NARCIS (Netherlands)

    Huang B; Guangzhou, M.

    2007-01-01

    The Rhine River in the Netherlands, the Yellow River in China and the Mississippi River in the U.S. are three great rivers in the world. Each of them is performing a significant role in the country. The delta area for each river, in particular, is served as the centre in importance and commonly the

  4. Comparative Study of Flood Risk Management and Land Use in the Deltas of Rhine River, Yellow River and Mississippi River

    NARCIS (Netherlands)

    Huang B; Guangzhou, M.

    2007-01-01

    The Rhine River in the Netherlands, the Yellow River in China and the Mississippi River in the U.S. are three great rivers in the world. Each of them is performing a significant role in the country. The delta area for each river, in particular, is served as the centre in importance and commonly the

  5. Hood River Passive House

    Energy Technology Data Exchange (ETDEWEB)

    Hales, D.

    2013-03-01

    The Hood River Passive Project was developed by Root Design Build of Hood River Oregon using the Passive House Planning Package (PHPP) to meet all of the requirements for certification under the European Passive House standards. The Passive House design approach has been gaining momentum among residential designers for custom homes and BEopt modeling indicates that these designs may actually exceed the goal of the U.S. Department of Energy's (DOE) Building America program to reduce home energy use by 30%-50% (compared to 2009 energy codes for new homes). This report documents the short term test results of the Shift House and compares the results of PHPP and BEopt modeling of the project.

  6. Geomorphology and River Management

    Directory of Open Access Journals (Sweden)

    GARY BRIERLEY

    2008-01-01

    Full Text Available Engineering-dominated practices, visible in a "command and control" outlook on natural systems, have induced enormous damage to the environment. Biodiversity losses and declining provision of ecosystem services are testimony to the non-sustainable outcomes brought about by such practices. More environmentally friendly approaches that promote a harmonious relationship between human activities and nature are required. Moves towards an "ecosystem approach" to environmental management require coherent (integrative scientific guidance. Geomorphology, the study of the form of the earth, provides a landscape template with which to ground this process. This way of thinking respects the inherent diversity and complexity of natural systems. Examples of the transition toward such views in environmental practice are demonstrated by the use of science to guide river management, emphasising applications of the River Styles framework.

  7. River Mileages and Drainage Areas for Illinois Streams. Volume 2. Illinois River Basin.

    Science.gov (United States)

    1979-12-01

    FOREST 50.2 MADISON STREET RIVER FOREST 50.5 IL PT 56 RIVER FOREST 51.0 C & NW RR RIVER FOREST 51.1 LAKE STREET RIVER FOREST 51.6 CHICAGO AVENUE RIVER ... FOREST 51.9 SILVER CREEK R RIVER FOREST 53.9 DAM S35v40NoRI2E RIVER FOREST 54.2 NORTH PUEBLO AVENUE RIVER FOREST 55.1 GRAND AVENUE RIVER FOREST 55.1...USGS GAGE 05530600 AT RIVER GROVE 451 415546 O75040 RIVER

  8. River and Human Rights

    Institute of Scientific and Technical Information of China (English)

    NIE WUGANG; MENG JIA

    2011-01-01

    @@ Nothing is like a river.It seems coming from nowhere, far back into antiquity.It is originated from drops of water and converged into a long stream that flows ceaselessly.It benefits the vast expanse of land and nourishes all the living on it.It stretches and undulates,forming ponds and lakes of different depths.It is moving or motionless,overflowing with vigor and vitality.

  9. Flooding on Elbe River

    Science.gov (United States)

    2002-01-01

    Heavy rains in Central Europe over the past few weeks have led to some of the worst flooding the region has witnessed in more than a century. The floods have killed more than 100 people in Germany, Russia, Austria, Hungary, and the Czech Republic and have led to as much as $20 billion in damage. This false-color image of the Elbe River and its tributaries was taken on August 20, 2002, by the Moderate Resolution Imaging Spectroradiometer (MODIS), flying aboard NASA's Terra satellite. The floodwaters that inundated Dresden, Germany, earlier this week have moved north. As can be seen, the river resembles a fairly large lake in the center of the image just south of the town of Wittenberg. Flooding was also bad further downriver in the towns of Maqgdeburge and Hitzacker. Roughly 20,000 people were evacuated from their homes in northern Germany. Fifty thousand troops, border police, and technical assistance workers were called in to combat the floods along with 100,000 volunteers. The floodwaters are not expected to badly affect Hamburg, which sits on the mouth of the river on the North Sea. Credit:Image courtesy Jacques Descloitres, MODIS Land Rapid Response Team at NASA GSFC

  10. Investigation on Water Pollution of Four Rivers in Coastal Wetland of Yellow River Estuary

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    [Objective] The study aimed at analysing water pollution of four rivers in coastal wetland of Yellow River estuary. [Method] Taking four seriously polluted rivers (Guangli River, Shenxian Ditch, Tiao River and Chao River) in coastal wetland of Yellow River estuary as study objects, water samples were collected from the four rivers in May (dry period), August (wet period) and November (normal period) in 2009 and 2010 respectively, then pollution indices like nutritive salts, COD, chlorophyll-a, petroleum, et...

  11. Tsunami Impacts in River Environments

    Science.gov (United States)

    Tolkova, E.; Tanaka, H.; Roh, M.

    2014-12-01

    The 2010 Chilean and the 2011 Tohoku tsunami events demonstrated the tsunami's ability to penetrate much farther along rivers than the ground inundation. At the same time, while tsunami impacts to the coastal areas have been subject to countless studies, little is known about tsunami propagation in rivers. Here we examine the field data and conduct numerical simulations to gain better understanding of the tsunami impacts in rivers.The evidence which motivated our study is comprised of water level measurements of the aforementioned tsunamis in multiple rivers in Japan, and the 2011 Tohoku and some other tsunamis in the Columbia River in the US. When the available tsunami observations in these very different rivers are brought together, they display remarkably similar patterns not observed on the open coast. Two phenomena were discovered in the field data. First, the phase of the river tide determines the tsunami penetration distance in a very specific way common to all rivers. Tsunami wave progressively disappears on receding tide, whereas high tide greatly facilitates the tsunami intrusion, as seen in the Figure. Second, a strong near-field tsunami causes substantial and prolonged water accumulation in lower river reaches. As the 2011 tsunami intruded rivers in Japan, the water level along rivers rose 1-2 m and stayed high for many hours, with the maximum rise occurring several km from the river mouth. The rise in the water level at some upstream gaging stations even exceeded the tsunami amplitude there.Using the numerical experiments, we attempt to identify the physics behind these effects. We will demonstrate that the nonlinear interactions among the flow components (tsunami, tide, and riverine flow) are an essential condition governing wave dynamics in tidal rivers. Understanding these interactions might explain some previous surprising observations of waves in river environments. Figure: Measurements of the 2010/02/27 tsunami along Naruse and Yoshida rivers

  12. Wild, scenic, and transcendental rivers

    Science.gov (United States)

    Showstack, Randy

    “A more lovely stream than this has never flowed on Earth,” 19th century American author Nathaniel Hawthorne wrote about the confluence of the Assabet and Concord Rivers, streams that meander about 40 km west of Boston, Massachusetts.Segments of these streams as well as the Assabet River became the newest additions to the U.S. National Wild and Scenic Rivers System, when President Bill Clinton signed into law the “Sudbury, Assabet, and Concord Wild and Scenic River Act” on April 9.

  13. Red River of the North Reconnaissance Report: Park River Subbasin.

    Science.gov (United States)

    1980-12-01

    experienced a natural increase, and their inmigration rates were less than one percent. Cavalier County’s increase in population was the result of a...natural increase j and an inmigration rate of 5.4 percent. The two largest towns are Grafton and Park River, and they are both located on the Park River

  14. A memória ventre da alma

    Directory of Open Access Journals (Sweden)

    Marina Massimi

    2010-12-01

    Full Text Available O artigo aborda o tema da memória como proposto num sermão de Vieira (1654, buscando reconstruir as matrizes conceituais (a concepção de memória de Agostinho e de Bernardo e práticas (a tradição da ortopraxis desenvolvida nas comunidades monásticas na Idade Média. Para ambos, a memória é concebida como processo ativo e abrangente, intimamente associada à emoção e à imaginação: não apenas rememora, mas organiza experiências e conceitos segundo um esquema norteado por lugares e percursos, tornando-os disponíveis para a invenção e a construção cognitiva.

  15. Taizhou Yangtze River Bridge

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    Taizhou Bridge lies between Taizhou, Zhenjiang and Changzhou City in Jiangsu Province. The total length of Taizhou Bridge is 62.088 kin. The whole line is designed by freeway codes with six lanes in two directions. The wholeinvestment is 9.37 billion RMB and the planned construction duration is 5.5 years. The main bridge crossing the Yangtze River is a continuous three-pylon two-span suspension bridge with the main span of 1 080 m. The bridge system is realized for the first time and ranks first in the world until now.

  16. Stochastic Modelling of River Geometry

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard; Schaarup-Jensen, K.

    1996-01-01

    Numerical hydrodynamic river models are used in a large number of applications to estimate critical events for rivers. These estimates are subject to a number of uncertainties. In this paper, the problem to evaluate these estimates using probabilistic methods is considered. Stochastic models...

  17. Treasure Along the Parker River.

    Science.gov (United States)

    Fitzpatrick, Ann-Marie; And Others

    Designed so that 100 to 125 heterogeneously grouped 7th and 8th grade students and a team of 5 core teachers might experience and discover the natural and historical "treasure" in the Parker River area of Massachusetts, this interdisciplinary unit centers on a hike to Parker River (6.7 miles) and visits to a cemetery, a monument, and Old Town…

  18. Geomorphology and River Dynamics of the Lower Copper River, Alaska

    Science.gov (United States)

    Brabets, Timothy P.; Conaway, Jeffrey S.

    2009-01-01

    Located in south-central Alaska, the Copper River drains an area of more than 24,000 square miles. The average annual flow of the river near its mouth is 63,600 cubic feet per second, but is highly variable between winter and summer. In the winter, flow averages approximately 11,700 cubic feet per second, and in the summer, due to snowmelt, rainfall, and glacial melt, flow averages approximately 113,000 cubic feet per second, an order of magnitude higher. About 15 miles upstream of its mouth, the Copper River flows past the face of Childs Glacier and enters a large, broad, delta. The Copper River Highway traverses this flood plain, and in 2008, 11 bridges were located along this section of the highway. The bridges cross several parts of the Copper River and in recent years, the changing course of the river has seriously damaged some of the bridges. Analysis of aerial photography from 1991, 1996, 2002, 2006, and 2007 indicates the eastward migration of a channel of the Copper River that has resulted in damage to the Copper River Highway near Mile 43.5. Migration of another channel in the flood plain has resulted in damage to the approach of Bridge 339. As a verification of channel change, flow measurements were made at bridges along the Copper River Highway in 2005-07. Analysis of the flow measurements indicate that the total flow of the Copper River has shifted from approximately 50 percent passing through the bridges at Mile 27, near the western edge of the flood plain, and 50 percent passing through the bridges at Mile 36-37 to approximately 5 percent passing through the bridges at Mile 27 and 95 percent through the bridges at Mile 36-37 during average flow periods. The U.S. Geological Survey's Multi-Dimensional Surface-Water Modeling System was used to simulate water-surface elevation and velocity, and to compute bed shear stress at two areas where the Copper River is affecting the Copper River Highway. After calibration, the model was used to examine the

  19. Hood River Passive House

    Energy Technology Data Exchange (ETDEWEB)

    Hales, D.

    2014-01-01

    The Hood River Passive Project was developed by Root Design Build of Hood River Oregon using the Passive House Planning Package (PHPP) to meet all of the requirements for certification under the European Passive House standards. The Passive House design approach has been gaining momentum among residential designers for custom homes and BEopt modeling indicates that these designs may actually exceed the goal of the U.S. Department of Energy's (DOE) Building America program to reduce home energy use by 30%-50% (compared to 2009 energy codes for new homes). This report documents the short term test results of the Shift House and compares the results of PHPP and BEopt modeling of the project. The design includes high R-Value assemblies, extremely tight construction, high performance doors and windows, solar thermal DHW, heat recovery ventilation, moveable external shutters and a high performance ductless mini-split heat pump. Cost analysis indicates that many of the measures implemented in this project did not meet the BA standard for cost neutrality. The ductless mini-split heat pump, lighting and advanced air leakage control were the most cost effective measures. The future challenge will be to value engineer the performance levels indicated here in modeling using production based practices at a significantly lower cost.

  20. Hood River Passive House

    Energy Technology Data Exchange (ETDEWEB)

    Hales, David [BA-PIRC, Spokane, WA (United States)

    2014-01-01

    The Hood River Passive Project was developed by Root Design Build of Hood River Oregon using the Passive House Planning Package (PHPP) to meet all of the requirements for certification under the European Passive House standards. The Passive House design approach has been gaining momentum among residential designers for custom homes and BEopt modeling indicates that these designs may actually exceed the goal of the U.S. Department of Energy's (DOE) Building America program to "reduce home energy use by 30%-50% (compared to 2009 energy codes for new homes). This report documents the short term test results of the Shift House and compares the results of PHPP and BEopt modeling of the project. The design includes high R-Value assemblies, extremely tight construction, high performance doors and windows, solar thermal DHW, heat recovery ventilation, moveable external shutters and a high performance ductless mini-split heat pump. Cost analysis indicates that many of the measures implemented in this project did not meet the BA standard for cost neutrality. The ductless mini-split heat pump, lighting and advanced air leakage control were the most cost effective measures. The future challenge will be to value engineer the performance levels indicated here in modeling using production based practices at a significantly lower cost.

  1. Hood River Passive House

    Energy Technology Data Exchange (ETDEWEB)

    Hales, David [BA-PIRC, Spokane, WA (United States)

    2014-01-01

    The Hood River Passive Project was developed by Root Design Build of Hood River Oregon using the Passive House Planning Package (PHPP) to meet all of the requirements for certification under the European Passive House standards. The Passive House design approach has been gaining momentum among residential designers for custom homes and BEopt modeling indicates that these designs may actually exceed the goal of the U.S. Department of Energy's (DOE) Building America program to "reduce home energy use by 30%-50% (compared to 2009 energy codes for new homes). This report documents the short term test results of the Shift House and compares the results of PHPP and BEopt modeling of the project. The design includes high R-Value assemblies, extremely tight construction, high performance doors and windows, solar thermal DHW, heat recovery ventilation, moveable external shutters and a high performance ductless mini-split heat pump. Cost analysis indicates that many of the measures implemented in this project did not meet the BA standard for cost neutrality. The ductless mini-split heat pump, lighting and advanced air leakage control were the most cost effective measures. The future challenge will be to value engineer the performance levels indicated here in modeling using production based practices at a significantly lower cost.

  2. American River Hydrologic Observatory

    Science.gov (United States)

    Glaser, S. D.; Bales, R. C.; Conklin, M. H.

    2016-12-01

    We have set up fourteen large wireless sensor networks to measure hydrologic parameters over physiographical representative regions of the snow-dominated portion of the river basin. This is perhaps the largest wireless sensor network in the world. Each network covers about a 1 km2 area and consists of about 45 elements. We measure snow depth, temperature humidity soil moisture and temperature, and solar radiation in real time at ten locations per site, as opposed to the traditional once-a-month snow course. As part of the multi-PI SSCZO, we have installed a 62-node wireless sensor network to measure snow depth, temperature humidity soil moisture and temperature, and solar radiation in real time. This network has been operating for approximately six years. We are now installing four large wireless sensor networks to measure snow depth, temperature humidity soil moisture and temperature, and solar radiation in East Branch of the North Fork of the Feather River, CA. The presentation will discuss the planning and operation of the networks as well as some unique results. It will also present information about the networking hardware designed for these installations, which has resulted in a start-up, Metronome Systems.

  3. Latent resonance in tidal rivers, with applications to River Elbe

    Science.gov (United States)

    Backhaus, Jan O.

    2015-11-01

    We describe a systematic investigation of resonance in tidal rivers, and of river oscillations influenced by resonance. That is, we explore the grey-zone between absent and fully developed resonance. Data from this study are the results of a one-dimensional numerical channel model applied to a four-dimensional parameter space comprising geometry, i.e. length and depths of rivers, and varying dissipation and forcing. Similarity of real rivers and channels from parameter space is obtained with the help of a 'run-time depth'. We present a model-channel, which reproduces tidal oscillations of River Elbe in Hamburg, Germany with accuracy of a few centimetres. The parameter space contains resonant regions and regions with 'latent resonance'. The latter defines tidal oscillations that are elevated yet not in full but juvenile resonance. Dissipation reduces amplitudes of resonance while creating latent resonance. That is, energy of resonance radiates into areas in parameter space where periods of Eigen-oscillations are well separated from the period of the forcing tide. Increased forcing enhances the re-distribution of resonance in parameter space. The River Elbe is diagnosed as being in a state of anthropogenic latent resonance as a consequence of ongoing deepening by dredging. Deepening the river, in conjunction with the expected sea level rise, will inevitably cause increasing tidal ranges. As a rule of thumb, we found that 1 m deepening would cause 0.5 m increase in tidal range.

  4. River-Based Experiential Learning: the Bear River Fellows Program

    Science.gov (United States)

    Rosenberg, D. E.; Shirley, B.; Roark, M. F.

    2012-12-01

    The Department of Civil and Environmental Engineering, Outdoor Recreation, and Parks and Recreation programs at Utah State University (USU) have partnered to offer a new, unique river-based experiential learning opportunity for undergraduates called the Bear River Fellows Program. The program allows incoming freshmen Fellows to experience a river first hand during a 5-day/4-night river trip on the nearby Bear River two weeks before the start of their first Fall semester. As part of the program, Fellows will navigate the Bear River in canoes, camp along the banks, interact with local water and environmental managers, collect channel cross section, stream flow, vegetation cover, and topological complexity data, meet other incoming freshmen, interact with faculty and graduate students, develop boating and leadership skills, problem solve, and participate as full members of the trip team. Subsequently, Fellows will get paid as undergraduate researchers during their Fall and Spring Freshman semesters to analyze, synthesize, and present the field data they collect. The program is a collaborative effort between two USU academic units and the (non-academic) division of Student Services and supports a larger National Science Foundation funded environmental modelling and management project for the lower Bear River, Utah watershed. We have advertised the program via Facebook and emails to incoming USU freshmen, received 35 applications (60% women), and accepted 5 Fellows into the program (3 female and 2 male). The river trip departs August 14, 2012. The poster will overview the Bear River Fellows Program and present qualitative and preliminary outcomes emerging from the trip and Fellows' work through the Fall semester with the field data they collect. We will also undertake more rigorous and longer longitudinal quantitative evaluation of Program outcomes (for example, in problem-solving and leadership) both in Spring 2013 and in subsequent 2013 and 2014 offerings of the

  5. Avaliação não invasiva das pressões de enchimento e remodelação do ventrículo esquerdo após infarto do miocárdio Non invasive assessment of left ventricular filling pressure and remodeling after acute myocardial infarction

    Directory of Open Access Journals (Sweden)

    Silvio Henrique Barberato

    2013-01-01

    Full Text Available FUNDAMENTO: A dilatação do ventrículo esquerdo (VE após infarto agudo do miocárdio (IAM é um importante determinante do prognóstico. A razão entre a velocidade diastólica E do fluxo mitral e a velocidade diastólica e' do anel mitral (relação E/e' é o melhor índice não invasivo para detectar elevação aguda da pressão de enchimento do VE. A hipótese deste estudo é que a E/e' possa predizer remodelação do VE após IAM tratado. OBJETIVO: Avaliar se a E/e' prediz remodelação ventricular após IAM, em comparação aos dados clínicos, laboratoriais e ecocardiográficos tradicionais. MÉTODO: Ecocardiogramas foram realizados em pacientes consecutivos com primeiro IAM, após angioplastia transluminal coronariana (ATC seguida de recanalização efetiva, 48 horas e 60 dias após o evento. A E/e' foi calculada pela média de quatro sítios do anel mitral. Remodelação do VE foi definida como aumento ≥ 15% do volume sistólico final ao método de Simpson. Análises estatísticas incluíram teste t de Student, curvas receptor-operador (ROC e regressão logística multivariada, com p significante BACKGROUND: Left ventricular (LV dilation after acute myocardial infarction (AMI is an important determinant of prognosis. The ratio of early mitral inflow velocity (E and peak early diastolic annular velocity (e' provides the best single index for noninvasive detection of acute elevation of LV filling pressure. OBJECTIVE: To assess whether E/e' ratio predicts LV remodeling after properly treated AMI compared with traditional clinical, laboratory and echocardiographic data. METHODS: Comprehensive echocardiograms were performed in a series of consecutive patients with first AMI successfully treated with primary percutaneous transluminal angioplasty (PTCA, both 48 hours after intervention and 60 days later. Mean E/e' was determined from four sites of the mitral annulus. LV remodeling was defined as more than 15% increase in end

  6. Variações de parâmetros da função diastólica do ventrículo esquerdo de acordo com a idade através da ecocardiografia com Doppler tissular Changes in the parameters of left ventricular diastolic function according to age on tissue Doppler imaging

    Directory of Open Access Journals (Sweden)

    Márcia Duarte Pedone

    2004-12-01

    Full Text Available OBJETIVO: Determinar a correlação entre as velocidades diastólicas do Doppler tissular com a idade em amostra de adultos saudáveis, e correlacionar a idade com as velocidades do fluxo transmitral e de veias pulmonares. MÉTODOS: Estudados, através da ecocardiografia, 51 indivíduos saudáveis, com idades entre 21 e 69 anos e registradas as velocidades miocárdicas diastólicas ao Doppler tissular e determinadas as velocidades dos fluxos transmitral e venoso pulmonar. RESULTADOS: As velocidades miocárdicas diastólicas iniciais septal basal e lateral basal apresentaram correlação inversa com a idade, com r = - 0,40 (p = 0,004 e r = - 0,60 (p = 0,0001 respectivamente. As velocidades atriogênicas do Doppler tissular foram diretamente correlacionadas com a idade, sendo no segmento septal basal r = 0,56 (p = 0,0001 e no segmento lateral basal r = 0,50 (p = 0,0001. As velocidades do fluxo transmitral e do fluxo venoso pulmonar também mostraram correlação com a idade. CONCLUSÃO: Existe correlação entre a idade e as velocidades miocárdicas diastólicas do Doppler tissular e com as velocidades do fluxo transmitral e fluxo venoso pulmonar, demonstrando em indivíduos saudáveis uma variação de parâmetros da função diastólica do ventrículo esquerdo com a evolução natural da idade.OBJECTIVE: To determine the correlation between diastolic velocities on tissue Doppler imaging and age in a sample of healthy adults and to correlate age with the velocities of transmitral and pulmonary vein flows. METHODS: Echocardiographic assessment of 51 healthy individuals, whose ages ranged from 21 to 69 years. The diastolic myocardial velocities were recorded on tissue Doppler imaging. The velocities of the transmitral and pulmonary vein flows were also determined. RESULTS: The initial basal septal and basal lateral diastolic myocardial velocities showed an inverse correlation with age [r = - 0.40 (P = 0.004, and r = - 0.60 (P = 0.0001, respectively

  7. Estudo da função ventricular na técnica de plicatura da parede livre do ventrículo esquerdo em cães Left ventricular function after plication of the left ventricular free wall in dogs

    Directory of Open Access Journals (Sweden)

    James Newton Bizetto Meira de Andrade

    2004-06-01

    Full Text Available OBJETIVO: Avaliar os efeitos da técnica na função ventricular esquerda em cães hígidos e com cardiomiopatia dilatada induzida pela doxorrubicina. MÉTODO: De 13 cães, oito receberam doxorrubicina até que a fração de encurtamento (FE fosse menor que 20%. Destes, quatro animais e os cinco não induzidos foram submetidos à plicatura da parede livre do ventrículo esquerdo (PPLVE. Os demais cães não foram operados. Foram avaliados débito cardíaco (DC, pressão arterial, exame físico, eletrocardiografia, sistema "Holter" e ecocardiografia, por 180 dias. RESULTADOS: Houve redução do volume ventricular esquerdo. Os cães induzidos melhoraram após a operação e a fração de ejeção (FEj retornou aos valores normais para a espécie. O DC e a FE aumentaram após a operação. Um cão foi a óbito. Nos cães não operados, a FE diminuiu e foram a óbito em torno de 40 dias após a indução; nos cães não induzidos, esta não se alterou. Houve extra-sístoles ventriculares, que se resolveram espontaneamente. CONCLUSÕES: A PPLVE sem circulação extracorpórea reduz o volume ventricular esquerdo e melhora a função cardíaca dos cães com cardiomiopatia dilatada induzida pela doxorrubicina, demonstrando baixa morbidade e mortalidade tardia.OBJECTIVE: We tested a new surgical technique, the plication of the left ventricular free wall, to reduce left ventricular area and volume and improve left ventricular systolic function, without using a cardiopulmonary bypass. METHODS: Dilated cardiomyopathy was induced in eight dogs by the injection of doxorubicin. Plication of the left ventricular free wall was performed in four dogs with induced cardiomyopathy and in five control dogs. Two dogs not submitted to surgery. The other two dogs died during the induction phase. Cardiac output, 2-dimensional and M-mode echocardiography, arterial blood pressure and electrocardiography were recorded over a 180 days period. Ambulatory electrocardiography

  8. Ablação com radiofreqüência de extra-sístoles da via de saída do ventrículo direito Radiofrequency catheter ablation of premature ventricular contractions originating in the right ventricular outflow tract

    Directory of Open Access Journals (Sweden)

    Francisco C. C. Darrieux

    2007-03-01

    Full Text Available OBJETIVOS: Avaliar se a ablação com radiofreqüência é um procedimento eficiente para o tratamento das extra-sístoles da via de saída do ventrículo direito (EVSVD, e se resulta em melhora dos sintomas. MÉTODOS: Estudo prospectivo, com 30 pacientes consecutivos (idade média de 40±13 anos, 25 do sexo feminino, sem cardiopatia estrutural aparente, com EVSVD, muito freqüentes (densidade média de 1.263±593/h, sintomáticos por mais de 1 ano (média =74 meses e refratários aos fármacos antiarrítmicos (3±1,7, incluindo os beta-bloqueadores, que foram submetidos à ablação com radiofreqüência. RESULTADOS: Após o primeiro procedimento, houve 23 sucessos iniciais (76,6% e 7 iniciais insucessos (23,4%. Quatro pacientes tiveram recorrências, sendo que dois desses não se submeteram ao segundo procedimento. O segundo procedimento foi realizado em 9 pacientes (7 insucessos iniciais e 2 recorrências, e o sucesso ocorreu em 5 pacientes adicionais, sendo 1 caso por acesso epicárdico. A taxa de sucesso final foi de 80% (24/30, e nenhuma complicação maior ocorreu. Após um seguimento médio de 14±6 meses, no grupo de sucesso final houve uma redução de mais de 90% na densidade das extra-sístoles(24/24; pOBJECTIVES: To evaluate if radiofrequency catheter ablation is an effective procedure for the treatment of right ventricular outflow tract premature ventricular contractions (RVOT-PVC and ascertain if it results in an improvement of symptoms. METHODS: A prospective study with 30 consecutive patients (mean age 40 ± 13 years, 25 females, with no apparent structural cardiopathy, with very frequent (mean density of 1,263 ± 593/h RVOT-PVC, symptomatic for more than one year (mean = 74 months and resistant to antiarrhythmic drugs (3 ± 1.7, including beta-blockers, who underwent radiofrequency catheter ablation. RESULTS: After the first procedure, there were 23 initial successful cases (76.6% and 7 initial failures (23.4%. Four patients

  9. Estudo experimental do implante transcateter de prótese valvada autoexpansível na via de saída do ventrículo direito em porcos Transcatheter implantation of self-expandable valved prosthesis in outlet right ventricle an experimental study in pigs

    Directory of Open Access Journals (Sweden)

    José Cícero Stocco Guilhen

    2011-09-01

    Full Text Available INTRODUÇÃO: Nos pacientes portadores de cardiopatias congênitas que foram submetidos à valvotomia pulmonar ou cirurgias de ampliação com o uso do anel da válvula pulmonar, a insuficiência ou estenose pulmonar residual pode acarretar falência cardíaca direita com deterioração clínica. Essas crianças necessitam de múltiplas intervenções ao longo de suas vidas, que impõem uma elevada taxa de morbidade e mortalidade. OBJETIVO: Desenvolvimento de uma técnica menos invasiva para implante de uma prótese valvada através do ventrículo direito. MÉTODOS: A prótese valvada consiste em um anel metálico construído com nitinol autoexpansível, revestida de poliéster, onde três cúspides de pericárdio bovino foram montadas. Doze porcos foram utilizados para a realização dos implantes. Foi realizado controle ecocardiográfico imediatamente após o implante e com uma, quatro, oito e 12 semanas. RESULTADOS: Um animal apresentou refluxo de grau moderado a importante e outros três refluxo de grau leve. Os gradientes transvalvares medidos antes do implante variavam entre 3 a 6 mmHg, sendo que, logo após o implante, houve aumento dos gradientes que variaram de 7 a 45 mmHg. Houve queda desses gradientes, sendo que em apenas quatro dos 12 animais os gradientes estavam acima de 20 mmHg. Em seis animais, ocorreu a formação de trombo na prótese, sendo esta a complicação mais frequente. CONCLUSÃO: Esses achados evidenciam a necessidade da realização de estudos com a utilização de anticoagulantes e ou antiagregantes plaquetários na tentativa de diminuir esse evento. O estudo pretende apresentar subsídios para o início do emprego de próteses valvares que poderiam ser implantadas através de técnicas menos invasivasINTRODUCTION: Patients with congenital heart disease who underwent pulmonary valvotomy or surgery to open the pulmonary valve ring are prone to develop residual pulmonary insufficiency or stenosis that may lead to

  10. Obesidade abdominal, resistência à insulina e hipertensão: impacto sobre a massa e a função do ventrículo esquerdo em mulheres Abdominal obesity, insulin resistance and hypertension: impact on left ventricular mass and function in women

    Directory of Open Access Journals (Sweden)

    Eliana A. Silva

    2007-08-01

    Full Text Available OBJETIVO: Avaliar a relação da obesidade central, hiperinsulinemia e hipertensão arterial (HA com a massa e a geometria do ventrículo esquerdo em mulheres. MÉTODOS: Foram avaliadas 70 mulheres (35 a 68 anos, divididas em quatro grupos de acordo com a presença de obesidade central e hipertensão arterial. Determinou-se a área de gordura visceral. A glicose e insulina plasmáticas foram determinadas antes e 2 h após uma sobrecarga oral de 75 g de glicose. Realizada avaliação cardiológica. RESULTADOS: Comparado ao grupo NT-OB, o grupo HT-OB apresentou insulinemia mais elevada no TOTG de 2 h (127,5 ± 73,0 vs 86,8 ± 42,7 µU/ml; p = 0,05 e menor relação onda E/A (0,8 ± 0,1 vs 1.2 ± 0,3; p OBJECTIVE: To evaluate the relationship between central obesity, hyperinsulinemia and arterial hypertension with left ventricular mass and geometry in women. METHODS: This study included 70 women (35-68 years, divided into four groups according to the presence of central obesity and hypertension. Visceral fat area was determined. Blood glucose and plasma insulin were determined before and two hours after an oral 75g glucose load and the patients were submitted to cardilogical evaluation. RESULTS: Compared to NT-OB, HT-OB presented higher levels of plasma insulin at 2h-OGTT (127.5 ± 73.0 vs 86.8 ± 42.7 µU/ml; p = 0.05, and reduced E wave/A wave ratio (E/A (0.8 ± 0.1 vs 1.2 ± 0.3; p < 0.05. Compared to NT-NO, HT-NO showed higher insulin levels before glucose load (7.46 ± 3.1 vs 4.32 ± 2.1 muU/ml; p < 0.05, higher HOMAr (1.59 ± 0.72 vs 0.93 ± 0.48 mmol.mU/l²; p = 0.006, higher leptin level (19.1 ± 9.6 vs 7.4 ± 3.5 ng/ml; p = 0.028, greater VF area (84.40 ± 55.7 vs 37.50 ± 23.0 cm²; p = 0.036, increased IVSTd (9.6 ± 1.2 vs 8.2 ± 1.7 mm; p <0.05 and (LVM/height (95.8 ± 22.3 vs 78.4 ± 15.5 g/m; p < 0.05. Multiple linear regression analysis showed age, BMI and fasting glucose as determinants on LVM/height (R² = 0.59; p < 0

  11. Fatores biológicos e superestimação da fração de ejeção do ventrículo esquerdo no gated SPECT Biological factors and overestimation of left ventricular ejection fraction by gated SPECT

    Directory of Open Access Journals (Sweden)

    Marco Antônio Condé de Oliveira

    2008-05-01

    Full Text Available FUNDAMENTO: Alguns pacientes apresentam fração de ejeção do ventrículo esquerdo (FEVE superestimada na cintilografia miocárdica com sincronização eletrocardiográfica (gated SPECT. OBJETIVO: Estabelecer a relação entre fatores biológicos e FEVE superestimada. MÉTODOS: Selecionamos 3.838 pacientes que realizaram gated SPECT entre 20/5/2000 e 16/9/2005, com imagens normais de perfusão e FEVE >50%. Analisamos as variáveis: sexo (29,4% feminino e 70,6% masculino, idade (de 20 a 94 anos - média: 56 anos, peso (de 33,5 a 150 kg - média: 79,6 kg, altura (de 138 a 220 cm - média: 171 cm e IMC (de 13,9 a 54 - média: 27,2. Em um subgrupo de 1.002 pacientes que realizaram ecocardiograma, incluímos as variáveis diâmetros diastólico (de 36 a 68 mm - média 47,5 mm e sistólico (de 22 a 41 mm - média 29,8 mm. Dividimos os pacientes em dois grupos: FEVE normal (80%. A Razão de Chances (RC para apresentar FEVE superestimada foi calculada para cada variável por regressão logística. RESULTADOS: Encontramos as seguintes Razões de Chances (p 0,2. No subgrupo de 1.002 pacientes, encontramos influência estatisticamente significativa na obtenção da FEVE superestimada para as variáveis diâmetro sistólico, sexo e altura. CONCLUSÃO: Apesar de o diâmetro sistólico influenciar na obtenção da FEVE superestimada, as variáveis sexo e altura apresentam influência independente na superestimação da FEVE pelo gated SPECT.BACKGROUND: Some patients present an overestimated left ventricular ejection fraction (LVEF on electrocardiogram-gated myocardial scintigraphy (gated SPECT. OBJECTIVE: To establish the relationship between biological factors and overestimated LVEF. METHODS: We selected 3838 patients who underwent gated SPECT between May 20, 2000 and September 16, 2005 with normal perfusion images and LVEF >50%. The following variables were analyzed: gender (29.4% females and 70.6% males, age (from 20 to 94 years - mean: 56 years, weight

  12. Quantification of left ventricular myocardial collagen system in children, young adults, and the elderly Cuantificación del sistema de colágeno del ventrículo izquierdo del miocardio en niños, adultos jóvenes y ancianos

    Directory of Open Access Journals (Sweden)

    Andrea Bogoslavsky Levy Mendes

    2012-06-01

    Full Text Available Studies on the collagen system of the human myocardium are still limited compared to those on small laboratory animals. The aim of this work was to observe the collagen tissue of the myocardium of the human heart as a function of age. The types of collagen, as well as the density of collagen tissue and the diameter of collagen fibrils, were examined. Fragments of the left ventricular wall from 15 hearts, 5 from children, 5 from young adults, and 5 from elderly individuals, were analyzed by using the Picrosirius-polarization method and by transmission electron microscopy (TEM. The results showed the presence of collagen type III and collagen type I, both in the endomysium and perimysium of the 3 groups studied. Measurements of collagen content in myocardial tissue displayed that both endomysial and perimysial collagen increase in number and thickness in the adult and elderly. These histochemical results coincided with the observations obtained with the electron microscope in showing an increase in the number of collagen fibrils with a large diameter in the adult and elderly hearts. The present results on cardiac collagen may be important for assessing the pathogenesis of several cardiopathies in the hearts of children, young adults, and the elderly.Los estudios sobre el colágeno del miocardio humano son aún escasos en comparación con los hechos en pequeños animales de laboratorio. El objetivo de este trabajo fue cuantificar el tejido colágeno del miocardio del corazón humano en función de la edad. Se estudiaron los tipos de colágeno, su densidad y el diámetro de las fibrillas de colágeno. Para esto se utilizaron fragmentos de la pared del ventrículo izquierdo de 15 corazones, cinco de niños, cinco de adultos jóvenes y 5 de personas de edad avanzada. Las muestras se analizaron mediante el método de Picrosirius-polarización y por microscopía electrónica de transmisión (MET. Los resultados mostraron la presencia de colágeno tipo

  13. 75 FR 51938 - Drawbridge Operation Regulation; Taunton River, Fall River and Somerset, MA

    Science.gov (United States)

    2010-08-24

    ... River and Somerset, MA AGENCY: Coast Guard, DHS. ACTION: Final rule. SUMMARY: The Coast Guard has...) Bridge at mile 1.8, across the Taunton River between Fall River and Somerset, Massachusetts. This final..., across the Taunton River between Fall River and Somerset, Massachusetts, has a vertical clearance in...

  14. 78 FR 49918 - Drawbridge Operation Regulation; Taunton River, Fall River and Somerset, MA

    Science.gov (United States)

    2013-08-16

    ... River and Somerset, MA AGENCY: Coast Guard, DHS. ACTION: Final rule. SUMMARY: The Coast Guard has... across the Taunton River, mile 2.1, between Fall River and Somerset, Massachusetts. The bridge owner...) entitled, ``Drawbridge Operation Regulation: Taunton River, Fall River and Somerset, MA'' in the...

  15. 76 FR 22033 - Safety Zone; Red River Safety Zone, Red River, MN

    Science.gov (United States)

    2011-04-20

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AAOO Safety Zone; Red River Safety Zone, Red River, MN AGENCY... Safety Unit Duluth, MN is establishing a temporary safety zone on the Red River, MN. This safety zone is...-0263 to read as follows: Sec. 165.T09-0263 Safety zone; Red River Safety Zone, Red River, MN. (a...

  16. 78 FR 62345 - Sabine River Authority of Texas; Sabine River Authority, State of Louisiana; Notice of...

    Science.gov (United States)

    2013-10-18

    ... Energy Regulatory Commission Sabine River Authority of Texas; Sabine River Authority, State of Louisiana; Notice of Authorization for Continued Project Operation On September 30 2011, the Sabine River Authority of Texas and Sabine River Authority, State of Louisiana (Sabine River Authorities), licensee(s)...

  17. 29 CFR 1917.126 - River banks.

    Science.gov (United States)

    2010-07-01

    ... 29 Labor 7 2010-07-01 2010-07-01 false River banks. 1917.126 Section 1917.126 Labor Regulations...) MARINE TERMINALS Terminal Facilities § 1917.126 River banks. (a) This section applies to temporary installations or temporary operations near a river bank. (b) Where working surfaces at river banks slope...

  18. Theory and application of nonlinear river dynamics

    Institute of Scientific and Technical Information of China (English)

    Yu-chuan BAI; Zhao-yin WANG

    2014-01-01

    A theoretical model for river evolution including riverbed formation and meandering pattern formation is presented in this paper. Based on nonlinear mathematic theory, the nonlinear river dynamic theory is set up for river dynamic process. Its core content includes the stability and tropism characteristics of flow motion in river and river selves’ evolution. The stability of river dynamic process depends on the response of river selves to the external disturbance, if the disturbance and the resulting response will eventually attenuate, and the river dynamics process can be restored to new equilibrium state, the river dynamic process is known as stable;otherwise, the river dynamic process is unstable. The river dynamic process tropism refers to that the evolution tendency of river morphology after the disturbance. As an application of this theory, the dynamical stability of the constant curvature river bend is calculated for its coherent vortex disturbance and response. In addition, this paper discusses the nonlinear evolution of the river peristaltic process under a large-scale disturbance, showing the nonlinear tendency of river dynamic processes, such as river filtering and butterfly effect.

  19. Ice Jams the Ob River

    Science.gov (United States)

    2007-01-01

    Russia's Ob River flows from south to north, and each summer, it thaws in the same direction. The result is that an ice jam sits downstream from thawed portions of the river, which is laden with heavy runoff from melted snow. On June 29, 2007, the Moderate Resolution Imaging Spectroradiometer (MODIS) flying on NASA's Terra satellite captured this image of the almost completely thawed Ob River. The scene is typical for early summer. South of the ice jam, the Gulf of Ob is swollen with pent-up run-off, and upstream from that, the river is widened as well. Unable to carve through frozen land, the river has little choice but to overflow its banks. For a comparison of early summer and autumn conditions, see Flooding on the Ob River in the Earth Observatory's Natural Hazards section. Besides the annual overflow, this image captures other circumstances of early summer. Sea ice is retreating from the Kara Sea. A lingering line of snow cover snakes its way along the Ob River, to the west. And while the land is lush and green in the south, it appears barren and brown in the north. Near the mouth of the river and the Kara Sea, the land is cold-adapted tundra, with diminutive plants and a short growing season. Just as the ice plugging the river had yet to thaw in the Far North's short summer, the tundra had not yet to greened up either. In this image it still appears lifeless beige. NASA image courtesy Jeff Schmaltz, MODIS Rapid Response Team, Goddard Space Flight Center

  20. River history and tectonics.

    Science.gov (United States)

    Vita-Finzi, C

    2012-05-13

    The analysis of crustal deformation by tectonic processes has gained much from the clues offered by drainage geometry and river behaviour, while the interpretation of channel patterns and sequences benefits from information on Earth movements before or during their development. The interplay between the two strands operates at many scales: themes which have already benefited from it include the possible role of mantle plumes in the breakup of Gondwana, the Cenozoic development of drainage systems in Africa and Australia, Himalayan uplift in response to erosion, alternating episodes of uplift and subsidence in the Mississippi delta, buckling of the Indian lithospheric plate, and changes in stream pattern and sinuosity along individual alluvial channels subject to localized deformation. Developments in remote sensing, isotopic dating and numerical modelling are starting to yield quantitative analyses of such effects, to the benefit of geodymamics as well as fluvial hydrology.

  1. A River in the Desert

    Institute of Scientific and Technical Information of China (English)

    杨仲言

    1994-01-01

    The Arabian Peninsula today is a barren desert. But 6,000 yearsago, says Farouk El-Baz,a river ran through the heart of the peninsula.From the Hijaz Mountains in western Saudi Arabia, it flowed 530 milesnortheast, emptying into the Persian Gulf through a delta that coveredmost of present day Kuwait. The Kuwait River, as El-Baz has dubbedit, averaged 5 miles wide and 50 feet deep along its entire length, and itcarried gravel from the Hijaz all the way to Kuwait. "It must have been amighty river, "says El-Baz.

  2. Arctic River organic matter transport

    Science.gov (United States)

    Raymond, Peter; Gustafsson, Orjan; Vonk, Jorien; Spencer, Robert; McClelland, Jim

    2016-04-01

    Arctic Rivers have unique hydrology and biogeochemistry. They also have a large impact on the Arctic Ocean due to the large amount of riverine inflow and small ocean volume. With respect to organic matter, their influence is magnified by the large stores of soil carbon and distinct soil hydrology. Here we present a recap of what is known of Arctic River organic matter transport. We will present a summary of what is known of the ages and sources of Arctic River dissolved and particulate organic matter. We will also discuss the current status of what is known about changes in riverine organic matter export due to global change.

  3. 1989 Aquatic Areas - Upper Mississippi River System - Open River 1

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The U.S. Geological Survey's Upper Midwest Environmental Sciences Center (UMESC) has created high-resolution land cover/use data sets for the Upper Mississippi River...

  4. Clinch River project: Sediment contaminants in the Lower Clinch River

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Sediment samples from three mainstem and seven tributary sites in the Clinch River Basin were analyzed for 21 organochlorine compounds, 19 metals, total volatile...

  5. Zoom on Electricity | Gros plan sur l’électricité

    Directory of Open Access Journals (Sweden)

    2012-05-01

    Full Text Available Share of Renewables in Electricity Generation in the World (in GWhPart de la production d’électricité à partir d’énergies renouvelables dans le monde (en GWh­Electricity Generation (in TWh, 2008Production d’électricité (en TWh, 2008* Fossils: oil, gas, coal | Energies fossiles : pétrole, gaz, charbon. ** Renewables: hydro power, biomass, wind, solar, geothermal, sea power | Energies renouvelables : hydraulique, biomasse, éolien, solaire, géothermie, énergies marines.Source: Observatoire d...

  6. Examples from the Greenland-Project - Gentle Remediation Optiones (GROs) on Pb/zn Contaminated Sites

    Science.gov (United States)

    Friesl-Hanl, Wolfgang; Kidd, Petra; Siebielec, Grzegorz

    2017-04-01

    The GREENLAND-project brought together "best practice" examples of several field applied gentle remediation techniques (EUFP7-project "Gentle remediation of trace element-contaminated land - GREENLAND; www.greenland-project.eu) with 17 partners from 11 countries. Gentle remediation options (GRO) comprise environmentally friendly technologies that have little or no negative impact on the soil. The main technologies are • phytoextraction • in situ immobilization and • assisted phytostabilization. Mining and processing activities affecting many sites worldwide negatively. The huge amounts of moved and treated materials have led to considerable flows of wastes and emissions. Alongside the many advantages of processed ores to our society, adverse effects in nature and risks for the environment and human health are observed. Three stages of impact of Pb/Zn-ore-treatment on the environment are discussed here: (1) On sites where the ores are mined impacts are the result of crushing, grinding, concentrating activities, and where additionally parts of the installations remain after abandoning the mine, as well as by the massive amounts of remaining deposits or wastes (mine tailings). (2) On sites where smelting and processing takes place, depending on the process (Welz, Doerschel) different waste materials are deposited. The Welz process waste generally contains less Cd and Pb than the Doerschel process waste which additionally shows higher water- extractable metals. (3) On sites close to the emitting source metal contamination can be found in areas for housing, gardening, and agricultural use. Emissions consist mainly from oxides and sulfides (Zn, Cd), sulfates (Zn, Pb, and Cd), chlorides (Pb) and carbonates (Cd). All these wastes and emissions pose potential risks of dispersion of pollutants into the food chain due to erosion (wind, water), leaching and the transfer into feeding stuff and food crops. In-situ treatments have the potential for improving the situation on site and will be shown by means of field experiments in Spain, Poland and Austria. Keywords: Mining and smelting, in-situ remediation, phytomanagement, gentle remediation options

  7. Pineapple juice and its fractions in enzymatic browning inhibition of banana [Musa (AAA group) Gros Michel].

    Science.gov (United States)

    Chaisakdanugull, Chitsuda; Theerakulkait, Chockchai; Wrolstad, Ronald E

    2007-05-16

    The effectiveness of pineapple juice in enzymatic browning inhibition was evaluated on the cut surface of banana slices. After storage of banana slices at 15 degrees C for 3 days, pineapple juice showed browning inhibition to a similar extent as 8 mM ascorbic acid but less than 4 mM sodium metabisulfite. Fractionation of pineapple juice by a solid-phase C18 cartridge revealed that the directly eluted fraction (DE fraction) inhibited banana polyphenol oxidase (PPO) about 100% when compared to the control. The DE fraction also showed more inhibitory effect than 8 mM ascorbic acid in enzymatic browning inhibition of banana puree during storage at 5 degrees C for 24 h. Further identification of the DE fraction by fractionation with ion exchange chromatography and confirmation using model systems indicated that malic acid and citric acid play an important role in the enzymatic browning inhibition of banana PPO.

  8. Zoom on Electricity | Gros plan sur l’électricité

    OpenAIRE

    2012-01-01

    Share of Renewables in Electricity Generation in the World (in GWh) Part de la production d’électricité à partir d’énergies renouvelables dans le monde (en GWh) ­ Electricity Generation (in TWh, 2008) Production d’électricité (en TWh, 2008) * Fossils: oil, gas, coal | Energies fossiles : pétrole, gaz, charbon. ** Renewables: hydro power, biomass, wind, solar, geothermal, sea power | Energies renouvelables : hydraulique, biomasse, éolien, solaire, géothermie, énergies marines. Source: Observ...

  9. Reactivación socio-productiva : margen Torrent Gros (Mallorca)

    OpenAIRE

    Ezeiza Karrera, Irati

    2012-01-01

    Centro autogestionado de iniciativa social y utilidad pública para la integración socio-laboral basada en la formación teorico-práctica en agricultura ecológica, permacultura, gestión medioambiental, hostelería y autoconstrucción.

  10. Reactivación socio-productiva : margen Torrent Gros (Mallorca)

    OpenAIRE

    Ezeiza Karrera, Irati

    2012-01-01

    Centro autogestionado de iniciativa social y utilidad pública para la integración socio-laboral basada en la formación teorico-práctica en agricultura ecológica, permacultura, gestión medioambiental, hostelería y autoconstrucción.

  11. Elwha River dam removal-Rebirth of a river

    Science.gov (United States)

    Duda, Jeffrey J.; Warrick, Jonathan A.; Magirl, Christopher S.

    2011-01-01

    After years of planning for the largest project of its kind, the Department of the Interior will begin removal of two dams on the Elwha River, Washington, in September 2011. For nearly 100 years, the Elwha and Glines Canyon Dams have disrupted natural processes, trapping sediment in the reservoirs and blocking fish migrations, which changed the ecology of the river downstream of the dams. All five Pacific salmon species and steelhead-historically present in large numbers-are locally extirpated or persist in critically low numbers. Upstream of the dams, more than 145 kilometers of pristine habitat, protected inside Olympic National Park, awaits the return of salmon populations. As the dams are removed during a 2-3 year project, some of the 19 million cubic meters of entrapped sediment will be carried downstream by the river in the largest controlled release of sediment into a river and marine waters in history. Understanding the changes to the river and coastal habitats, the fate of sediments, and the salmon recolonization of the Elwha River wilderness will provide useful information for society as future dam removals are considered.

  12. The Scientific Challenges of Yellow River Study

    Institute of Scientific and Technical Information of China (English)

    Liu Xiaoyan; Sun Yangbo

    2005-01-01

    @@ The Yellow River is famous for its complex and unique physical conditions which give great challenges to the river management. Based on the study and analysis of the existing problems and research progress, this paper indicated that the most significant challenges of Yellow River studies are: long term hydrological and morphological changes; the optimized hydrology and sediment conditions to maintain the healthy life of the River; and simulation of Yellow River through mathematical model and physical models.

  13. Quaternary Morphodynamics for two large rivers: the Fly River, PNG, and the Mekong River, Cambodia.

    Science.gov (United States)

    Aalto, R. E.; Lauer, J. W.; Darby, S. E.; Goni, M. A.; Dietrich, W. E.

    2014-12-01

    During glacial marine transgressions, sediment & carbon are deposited due to the infilling of lowland fluvial systems, material that is then largely removed during ensuing regressions. Measuring & modelling these processes would help quantify the amount, timing, & preservation of these materials, providing insight into the morphodynamics of lowland fluvial systems in response to sea level change. We investigated the infilling dynamics of the Fly and Strickland Rivers, Papua New Guinea. Field data include: 14C dated deep cores recording base level evolution over the Holocene, sonar imaging of floodbasin stratigraphy, and the observations of blocked valley lakes and weathered erosional remnants from LGM conditions. Similar research was conducted on the Mekong River, Cambodia, where we have imaged basin fill stratigraphy and recorded the extent of blocked valley lakes. Such field data provide tantalizing empirical glimpses into the landscapes & flux buffering exhibited by large tropical rivers during glacial-interglacial transitions. We upscale our observations by modelling river system evolution, employing a GpU Lowland Landscape Evolution Model (GULLEM) to predict the evolution of the entire basin. A novel & powerful (>10 Tflops on an inexpensive computer) simulator, GULLEM models morphodynamics and estimates the accommodation space subsequently infilled during marine transgressions by representing a range of geomorphic processes, including: river & tributary incision, non-linear diffusion, sea level and isostatic change, hydraulic geometry, tectonic deformation, sediment production, transport & deposition, & tracking of the resulting stratigraphy. GULLEM's vectorized approach allows for massively parallel operation on GPUs (Graphics Processing Unit), making it practical to model coupled fluvial-landscape evolution for complex lowland river systems over large temporal and spatial scales. Our combined approach affords estimates for the timing and budgets of sediment

  14. Upper Kenai River Cooperative Plan

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Upper Kenai River Cooperative Plan is the product of a joint effort of the Chugach National Forest, Kenai National Wildlife Refuge, Alaska Division of Parks and...

  15. Haw River sediment quality assessment

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report documents an evaluation of chemical contaminants in, and toxicity of, sediments collected from impoundments created by dams on the Haw River in Alamance...

  16. Arkansas River Water Needs Assessment

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report is on the legal elements, hydrologic analysis, objectives, and water levels related to the Arkansas River and the management of it.

  17. Mississippi River Valley alluvial aquifer

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set represents the extent of the Mississippi River Valley alluvial aquifer in the states of Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and...

  18. Riparian Habitat - San Joaquin River

    Data.gov (United States)

    California Department of Resources — The immediate focus of this study is to identify, describe and map the extent and diversity of riparian habitats found along the main stem of the San Joaquin River,...

  19. Togiak River sportfishing studies, 1984

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Nearly three thousand angler days of effort was estimated to have been spent on the Togiak River in 1984. Effort was clearly dominated by the professional guiding...

  20. Umpqua River Oregon Geologic Floodplain

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Umpqua River drains 12,103 square kilometers (4,673 square miles) in southwest Oregon before flowing into the Pacific Ocean at Winchester Bay near the city of...

  1. Bremner River, Alaska, a wild and scenic river analysis: Preliminary draft

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Bremner River possesses the values which qualify it for inclusion in the National Wild and Scenic Rivers System. The Bremner River fulfills the requirements of...

  2. 77 FR 45653 - Yakima River Basin Conservation Advisory Group; Yakima River Basin Water Enhancement Project...

    Science.gov (United States)

    2012-08-01

    ... Bureau of Reclamation Yakima River Basin Conservation Advisory Group; Yakima River Basin Water... on the structure, implementation, and oversight of the Yakima River Basin Water Conservation Program... of the Water Conservation Program, including the applicable water conservation guidelines of...

  3. Missouri River, Natural Resources Bibliography.

    Science.gov (United States)

    1997-07-01

    1941. Red River of the north research Academy of Science 52:127-39. investigations, a report. North Dakota State Department, Health Division, Sanitary ...abandoned municipal-industrial waste landfill on the 1546. ROGERS DJ. 1965. A terminal study of the Missouri River floodplain. Ground Water Missouri...Biogeography 502, 543, 2066 Boundary Conditions 1796 Barges 26 Biography 1430 Boundary Disputes 241 Barriers 1050 Bioindicators 1773, 2124, 2125 Bow

  4. Dose efetiva de sedação em ecocardiograma transesofágico: relação com idade, área de superfície e função do ventrículo esquerdo Dosis efectiva de sedación en ecografía transesofágica: relación con edad, área de superficie y función del VI Effective dose of sedation in transesophageal echocardiography: relation to age, body surface area and left ventricle function

    Directory of Open Access Journals (Sweden)

    Guilherme Moreira José

    2009-12-01

    Full Text Available FUNDAMENTO: A sedação com midazolam e meperidina é amplamente utilizada em ecocardiografia transesofágica, entretanto, não existe dose média estabelecida para cada caso. OBJETIVO: Correlacionar as doses médias de midazolam e meperidina para sedação adequada em ecocardiografia transesofágica com faixa etária, área de superfície corpórea e fração de ejeção do ventrículo esquerdo. MÉTODOS: Estudo retrospectivo envolvendo 1.841 pacientes submetidos à sedação baseada na escala de Ramsay, com solução contendo midazolam 1,5 mg (1,5 ml, meperidina 1 mg (1 ml e água destilada (7,5 ml. Analisamos quatro grupos etários: G1: 65 anos. Obtivemos a área de superfície corpórea pela fórmula: {[(altura x 1000,725] x (peso0,425 x 0,0071}. Com relação à fração de ejeção do ventrículo esquerdo, estudamos dois grupos: GA: 55%. Na análise estatística utilizamos o teste de Kruskal-Wallis para correlação com idade e fração de ejeção do ventrículo esquerdo, e correlação linear simples para área de superfície corpórea. RESULTADOS: No estudo da idade, as doses médias de sedação necessárias foram significativamente menores no G3 e G4 (p FUNDAMENTO: La sedación con midazolam y meperidina es ampliamente utilizada en ecografía transesofágica, no obstante, no existe dosis media establecida para cada caso. OBJETIVO: Correlacionar la dosis media de midazolam y meperidina para sedación adecuada en ecografía transesofágica con intervalo de edades, área de superficie corporal y fracción de eyección del ventrículo izquierdo. MÉTODOS: Estudio retrospectivo involucrando 1.841 pacientes sometidos a sedación basada en la escala de Ramsay, con solución conteniendo midazolam 1,5 mg (1,5 ml, meperidina 1 mg (1 ml y agua destilada (7,5 ml. Analizamos cuatro grupos etarios: G1: 65 años. Obtuvimos el área de superficie corporal mediante la fórmula: {[(altura x 1000,725] x (peso0,425 x 0,0071}. Con relación a la fracci

  5. Muerte súbita cardíaca en un paciente esquizofrénico: ruptura de la pared libre del ventrículo izquierdo por infarto agudo de miocardio: Exposición de un caso y revisión de la literatura Sudden cardiac death in a schizophrenic patient: left ventricular free wall rupture due to acute myocardial infarction: Case report and literature review

    Directory of Open Access Journals (Sweden)

    A. Rico García

    2002-10-01

    Full Text Available Los enfermos psiquiátricos, y concretamente los esquizofrénicos, manifiestan en ocasiones síntomas somáticos cuya interpretación es difícil lo que puede dar lugar a errores de diagnóstico diferencial con una patología orgánica. En el caso del infarto agudo de miocardio el error diagnóstico puede llegar a ser fatal con las lógicas repercusiones médico-forenses que se derivan de esta situación. En este artículo presentamos el caso de un paciente con un trastorno psiquiátrico perfectamente diagnosticado y tratado (esquizofrenia paranoide asociado a una cardiopatía isquémica que debuta clínicamente con un infarto agudo de miocardio. No obstante, la sintomatología somática manifestada por el paciente fue atribuida a su proceso psicopatológico de base por lo que no se le prestó atención médica y se produjo el fallecimiento de forma súbita. En la autopsia médico-forense se encontró un taponamiento cardiaco secundario a la ruptura de la pared libre del ventrículo izquierdo por infarto agudo de miocardio. Se revisa la literatura sobre la ruptura de la pared libre del ventrículo izquierdo como complicación de un infarto agudo de miocardio atendiendo a sus características clínicas, frecuencia, factores de riesgo y anatomía patológica. Los estudios médico-forenses ponen de manifiesto que la frecuencia de esta complicación es muy superior cuando la muerte se produce en el medio extrahospitalario que cuando ocurre en el medio hospitalario.Psychiatric patients, mainly schizophrenics, have occasionally somatic symptoms that are difficult to interpret leading to errors in the differential diagnosis with an organic illness. In the case of the acute myocardial infarction, the diagnostic's mistake may be fatal with the logical medico-legal repercussions derived from this situation. In this paper we present the case of a patient with a mental disorder perfectly diagnosed and treated, (Paranoid Schizophrenia, associated with an

  6. Ecosystem Services of Rivers: The Don River (Russian Federation) and the Roanoke River (USA)

    Science.gov (United States)

    The concept of ecosystem services recognizes the services, and benefits, provided to people by ecosystems. River systems provide many services to people, including freshwater provisioning, carbon storage, fisheries, recreation, transportation, and biodiversity. Here, we review th...

  7. Analysis on River Sediment Changes of the Upper Reaches of Yangtze River

    Institute of Scientific and Technical Information of China (English)

    ZHONG Xiang-hao; SHI Guo-yu; XU Quan-xi; CHEN Ze-fang; LIU Shu-zhen

    2005-01-01

    The sediment load and river sedimentation of the upper reaches of Yangtze River has been undergoing constant changes as complex landform, large mountain area and plentiful precipitation make the drainage area of Yangtze River very vulnerable to water erosion and gravity erosion. Through analyzing the hydrological and sediment load statistics recorded by major hydrological stations along Yangtze River since 1950s, and editing the accumulation graph of annual runoff volume and annual sediment load, we find out that the suspended-sediment of Yangtze river has been decreasing year by year in Wulong Hydrological Station on Wujiang River, Beibei Hydrological Station on Jialingjiang River, Lijiawan Hydrological Station on Tuojiang River and Gaochang Hydrological Station on Minjiang River, Yichang Hydrological Station, Cuntan Hydrological Station along Yangtze River mainstream share the same experience too. But the statistics obtained at Pingshan Hydrological Station on Jinshajiang River shows the sediment load there has increased. Taking ecological construction, hydraulic engineering construction and precipitation changes into consideration, the thesis analyses the causes for the sediment load decrease of Jialingjiang River, Tuojiang River, Minjiang River and Wujiang River and provides us both scientific foundation for further study of river sediment changes of the upper reaches of Yangtze River, and measures to control river sedimentation.

  8. Valley evolution by meandering rivers

    Science.gov (United States)

    Limaye, Ajay Brian Sanjay

    Fluvial systems form landscapes and sedimentary deposits with a rich hierarchy of structures that extend from grain- to valley scale. Large-scale pattern formation in fluvial systems is commonly attributed to forcing by external factors, including climate change, tectonic uplift, and sea-level change. Yet over geologic timescales, rivers may also develop large-scale erosional and depositional patterns that do not bear on environmental history. This dissertation uses a combination of numerical modeling and topographic analysis to identify and quantify patterns in river valleys that form as a consequence of river meandering alone, under constant external forcing. Chapter 2 identifies a numerical artifact in existing, grid-based models that represent the co-evolution of river channel migration and bank strength over geologic timescales. A new, vector-based technique for bank-material tracking is shown to improve predictions for the evolution of meander belts, floodplains, sedimentary deposits formed by aggrading channels, and bedrock river valleys, particularly when spatial contrasts in bank strength are strong. Chapters 3 and 4 apply this numerical technique to establishing valley topography formed by a vertically incising, meandering river subject to constant external forcing---which should serve as the null hypothesis for valley evolution. In Chapter 3, this scenario is shown to explain a variety of common bedrock river valley types and smaller-scale features within them---including entrenched channels, long-wavelength, arcuate scars in valley walls, and bedrock-cored river terraces. Chapter 4 describes the age and geometric statistics of river terraces formed by meandering with constant external forcing, and compares them to terraces in natural river valleys. The frequency of intrinsic terrace formation by meandering is shown to reflect a characteristic relief-generation timescale, and terrace length is identified as a key criterion for distinguishing these

  9. PRINCIPLES OF RIVER TRAINING AND MANAGEMENT

    Institute of Scientific and Technical Information of China (English)

    Zhaoyin WANG; Shimin TIAN; Yujun YI; Guoan YU

    2007-01-01

    River regulation and river training have been performed for various purposes and negative effects have been shown in numerous cases. In some cases the negative effects are so serious that humans have to consider to "renaturalize" the regulated rivers. Only by using the strategy of integrated river management the diverse river uses and natural fluvial processes and ecological systems may be harmonized. Based on analysis of case studies and data collected from literatures this paper presents the concept of integrated river management and four principles of river training. The integrated river management comprises: 1) taking the watershed, upper stream basin including the tributaries, middle and lower reaches and the estuary as an integrated entity in the planning, design and management; and 2) mitigating or controlling the negative impacts on hydrology, erosion and sedimentation, fluvial processes, land use and river use, environment and ecology while in achieving economic benefit from water resources development, flood safety management and hydropower exploitation. River training and management should be in accordance with the four principles: 1) extending the duration of river water flowing on the continent, which may be achieved by extending the river course or reducing the flow velocity; 2) controlling various patterns of erosions and reducing the sediment transportation in the rivers; 3) increasing the diversity of habitat and enhancing the connectivity between the river and riparian waters; and 4) restoring natural landscapes.

  10. The Kipawa River versus the Tabaret River diversion projects

    Energy Technology Data Exchange (ETDEWEB)

    Karwacki, P. [Ottawa, ON (Canada)

    2003-08-01

    Hydro-Quebec wants to divert the Kipawa River in northwest Quebec from its natural streambed. While the first time visitor is likely to emphatically proclaim the Kipawa River as the most beautiful, most serene place they have ever encountered, hydro consultants and engineers, disconnected from the attractiveness of that place, are making cost/benefit recommendations that marginalize the inherent value of a free-flowing Kipawa. This paper will discuss the following points: (1) The Kipawa River has its own inherent value, which is related to the cost of simulating threatened white-water habitats in general. (2) The costs of recreating white-water habitats are more understandable through the study of man-made white-water venues. (3) The cost to recreate or simulate a threatened white-water habitat should be factored into the cost of the hydro-project feasibility. The Kipawa River's own inherent value should be factored into the cost of the Tabaret Diversion Project. (4) Methods of gaining community acceptance should be public and open: independent third-party arbitration is recommended. Use of monetary incentives to encourage public acceptance is unethical, immoral and unjustly biased against the survival of white-water habitats. (5) Recreational use of white-water habitats, like the Kipawa River are increasingly important engines of economic growth in Canada and around the world. (author)

  11. The river model of black holes

    OpenAIRE

    Hamilton, Andrew J. S.; Lisle, Jason P.

    2004-01-01

    This paper presents an under-appreciated way to conceptualize stationary black holes, which we call the river model. The river model is mathematically sound, yet simple enough that the basic picture can be understood by non-experts. %that can by understood by non-experts. In the river model, space itself flows like a river through a flat background, while objects move through the river according to the rules of special relativity. In a spherical black hole, the river of space falls into the b...

  12. Atividade autonômica em uma adolescente com ventrículo único submetida à intervenção fisioterapêutica: relato de caso Autonomic activity in an adolescent with a single ventricle who underwent physical therapy intervention: case report

    Directory of Open Access Journals (Sweden)

    V Castello

    2008-04-01

    Full Text Available OBJETIVO: Avaliar a atividade autonômica de uma adolescente com ventrículo único (VU, sem correção cirúrgica, participante de um programa de fisioterapia. MATERIAIS E MÉTODOS: Paciente do sexo feminino, 14 anos, com diagnóstico de VU tipo esquerdo, sem correção cirúrgica. A atividade autonômica foi avaliada pela variabilidade da freqüência cardíaca (VFC nas posições supina e sentada, e pela manobra para acentuar a arritmia sinusal respiratória (M-ASR no início do primeiro (A1, segundo (A2 e terceiro anos (A3 de tratamento fisioterapêutico cardiovascular (TFC ambulatorial. Os intervalos RR e a freqüência cardíaca batimento a batimento foram calculados e armazenados para posterior análise. A VFC foi avaliada pelos índices RMSSD e RMSM e no domínio da freqüência pelas bandas de alta e baixa freqüência em unidades normalizadas (AFun e BFun, respectivamente e pela razão BF/AF. O TFC constou de exercícios respiratórios associados a exercícios ativos e resistidos gerais, durante dois anos. RESULTADOS: De A1 para A3, o RMSM reduziu (14,5%, a banda de BFun (42,2% e a razão BF/AF aumentou (117,0%, e a banda AFun diminuiu (35,2%. Em todas as situações, a banda BFun foi maior e a AFun foi menor na posição sentada. Além disso, a resposta parassimpática à M-ASR aumentou da situação A1 para A3 em 7,4 e 47,3%, respectivamente. CONCLUSÕES: Concluímos que, na paciente estudada, a redução da VFC parece estar associada com o avanço da doença, porém, não houve prejuízos frente à mudança postural. Adicionalmente, o TFC proposto incrementou a resposta parassimpática durante a M-ASR.OBJECTIVE: To evaluate the autonomic activity of an adolescent with a single ventricle without surgical correction who participated in a physical therapy program. METHODS: This was a 14-year-old female patient with a left-type single ventricle who had not undergone any surgical intervention. The autonomic activity was evaluated

  13. Análise ecocardiográfica da função diastólica do ventrículo esquerdo após infarto do miocárdio em ratos Echocardiographyc analysis of the ventricular diastolic function after myocardial infarction in rats

    Directory of Open Access Journals (Sweden)

    Cláudio Léo Gelape

    2005-03-01

    Full Text Available OBJETIVO: Avaliar a função ventricular diastólica do ventrículo esquerdo (VE pelo ecocardiograma (ECO uma e três semanas pós-infarto agudo do miocárdio (IAM. MÉTODO: Utilizaram-se 19 ratas Wistar com peso médio de 209 gramas. Os animais foram distribuídos em: grupo A, controle (n=7 submetido a ECO e não infartado; grupo B, infartado (n=9, submetido a ECO após uma semana (grupo B1, n=9 e 3 semanas (grupo B3, n=8 do IAM. Três animais morreram no transoperatório e um após o primeiro ECO. Realizou-se anestesia com cetamina (50mg/kg/peso e xilazina (10mg/kg/peso intraperitoneal, intubação e ventilação. O IAM foi induzido por ligadura da artéria descendente anterior após toracotomia esquerda. Avaliou-se a função cardíaca por ECO modelo 21275A HP Sonos 1500 com transdutor de 7,5/5,5 MHz e a função diastólica pelo Doppler transmitral com avaliação das ondas A e E, e volume atrial esquerdo (VAE. O IAM foi confirmado por análise histopatológica na terceira semana. RESULTADOS: Não houve diferença significativa na velocidade das ondas E (A=62cm/s, B1=65cm/s, B3=69cm/s e onda A (A=43cm/s, B1=40cm/s, B3=41cm/s entre os grupos. Observou-se aumento significativo no VAE grupo A vs B1 e grupo A vs B3 (A=0,05mL vs B1=0,15mL, p=0,04 e A vs B3=0,14mL, p=0,01. Todos os animais apresentaram IAM na terceira semana. CONCLUSÕES: VAE parece ser útil para definição da disfunção diastólica do VE pós-IAM. O VAE pode refletir aumento da pressão diastólica final do VE, secundário à disfunção sistólica e/ou diastólicaOBJECTIVE: To evaluate the diastolic left ventricular function by echocardiography one and three weeks after acute myocardial infarction (AMI. METHOD: Nineteen Wistar rats (mean 209 g were utilized. After anesthesia with ketamine (50mg/kg and xylazine (10mg/kg, the left coronary artery was ligated after left thoracotomy to cause myocardial infarction. The animals were divided in two groups: group A (control, n=7 and

  14. Síncope em pacientes com extra-sístoles de via de saída de ventrículo direito e sem cardiopatia estrutural aparente Syncope in patients with right ventricle outflow tract premature beats and no apparent structural cardiopathy

    Directory of Open Access Journals (Sweden)

    Ana Cristina Ludovice

    2006-11-01

    Full Text Available OBJETIVO: Estudar a prevalência de síncope neurocardiogênica em pacientes com síncope inexplicada e extra-sístoles ventriculares (EV, com morfologia de via de saída de ventrículo direito (VSVD sem cardiopatia estrutural aparente. MÉTODOS: Noventa pacientes (66 mulheres, idade média de 40,2 ± 16,95 anos com EV monomórficas com origem na VSVD foram avaliados prospectivamente. Cinqüenta e quatro pacientes apresentavam síncopes ou pré-síncopes associadas ou não a palpitações; 27 apresentavam palpitações sem pré-síncope ou síncope, e 9 eram assintomáticos. Todos foram submetidos a ecocardiograma, ECG de alta resolução, ressonância magnética cardíaca e teste de esforço para afastar cardiopatia estrutural e taquicardia ventricular adrenérgico-dependente, e a monitorização com Holter e monitor de eventos sintomáticos para correlacionar os sintomas com a arritmia. A investigação de suscetibilidade a síncope neurocardiogênica foi avaliada pelo teste de inclinação (TI. Os grupos foram comparados quanto a sexo, idade, freqüência e complexidade das extra-sístoles, com e sem esforço físico, resultado do TI e evolução clínica. RESULTADOS: No grupo com síncope e pré-síncope, o TI foi positivo em 38% dos casos e nos grupos com palpitações e assintomáticos, em 11% (p = 0,0257. Após orientação e tratamento da síncope neurocardiogênica, 85% dos pacientes com síncope e pré-sincope e TI positivo permaneceram assintomáticos durante seguimento médio de 40 meses. Dois pacientes com síncope e TI negativos apresentaram taquicardia ventricular sustentada espontânea durante a evolução clínica. CONCLUSÃO: A prevalência de síncope neurocardiogênica em pacientes com EV idiopáticas de VSVD é alta. Pacientes com síncope recorrente inexplicada e EV idiopáticas devem ser mantidos sob investigação.OBJECTIVE: Study the prevalence of neurocardiogenic etiology in patients with unexplained syncope and

  15. Intermittent ephemeral river-breaching

    Science.gov (United States)

    Reniers, A. J.; MacMahan, J. H.; Gallagher, E. L.; Shanks, A.; Morgan, S.; Jarvis, M.; Thornton, E. B.; Brown, J.; Fujimura, A.

    2012-12-01

    In the summer of 2011 we performed a field experiment in Carmel River State Beach, CA, at a time when the intermittent natural breaching of the ephemeral Carmel River occurred due to an unusually rainy period prior to the experiment associated with El Nino. At this time the river would fill the lagoon over the period of a number of days after which a breach would occur. This allowed us to document a number of breaches with unique pre- and post-breach topographic surveys, accompanying ocean and lagoon water elevations as well as extremely high flow (4m/s) velocities in the river mouth during the breaching event. The topographic surveys were obtained with a GPS-equipped backpack mounted on a walking human and show the evolution of the river breaching with a gradually widening and deepening river channel that cuts through the pre-existing beach and berm. The beach face is qualified as a steep with an average beach slope of 1:10 with significant reflection of the incident waves (MacMahan et al., 2012). The wave directions are generally shore normal as the waves refract over the deep canyon that is located offshore of the beach. The tide is mixed semi-diurnal with a range on the order of one meter. Breaching typically occurred during the low-low tide. Grain size is highly variable along the beach with layers of alternating fine and coarse material that could clearly be observed as the river exit channel was cutting through the beach. Large rocky outcroppings buried under the beach sand are also present along certain stretches of the beach controlling the depth of the breaching channel. The changes in the water level measured within the lagoon and the ocean side allows for an estimate of the volume flux associated with the breach as function of morphology, tidal elevation and wave conditions as well as an assessment of the conditions and mechanisms of breach closure, which occurred on the time scale of O(0.5 days). Exploratory model simulations will be presented at the

  16. Tsunami Bores in Kitakami River

    Science.gov (United States)

    Tolkova, Elena; Tanaka, Hitoshi

    2016-07-01

    The 2011 Tohoku tsunami entered the Kitakami river and propagated there as a train of shock waves, recorded with a 1-min interval at water level stations at Fukuchi, Iino, and the weir 17.2 km from the mouth, where the bulk of the wave was reflected back. The records showed that each bore kept its shape and identity as it traveled a 10.9-km-path Fukuchi-Iino-weir-Iino. Shock handling based on the cross-river integrated classical shock conditions was applied to reconstruct the flow velocity time histories at the measurement sites, to estimate inflow into the river at each site, to evaluate the wave heights of incident and reflected tsunami bores near the weir, and to estimate propagation speed of the individual bores. Theoretical predictions are verified against the measurements. We discuss experiences of exercising the shock conditions with actual tsunami measurements in the Kitakami river, and test applicability of the shallow-water approximation for describing tsunami bores with heights ranging from 0.3 to 4 m in a river segment with a depth of 3-4 m.

  17. Tsunami Bores in Kitakami River

    Science.gov (United States)

    Tolkova, Elena; Tanaka, Hitoshi

    2016-12-01

    The 2011 Tohoku tsunami entered the Kitakami river and propagated there as a train of shock waves, recorded with a 1-min interval at water level stations at Fukuchi, Iino, and the weir 17.2 km from the mouth, where the bulk of the wave was reflected back. The records showed that each bore kept its shape and identity as it traveled a 10.9-km-path Fukuchi-Iino-weir-Iino. Shock handling based on the cross-river integrated classical shock conditions was applied to reconstruct the flow velocity time histories at the measurement sites, to estimate inflow into the river at each site, to evaluate the wave heights of incident and reflected tsunami bores near the weir, and to estimate propagation speed of the individual bores. Theoretical predictions are verified against the measurements. We discuss experiences of exercising the shock conditions with actual tsunami measurements in the Kitakami river, and test applicability of the shallow-water approximation for describing tsunami bores with heights ranging from 0.3 to 4 m in a river segment with a depth of 3-4 m.

  18. The River Danube: An Examination of Navigation on the River

    Science.gov (United States)

    Cooper, R. W.

    One of the definitions of Navigation that gets little attention in this Institute is (Oxford English Dictionary), and which our French friends call La Navigation. I have always found this subject fascinating, and have previously navigated the Rivers Mekong, Irrawaddy, Hooghly, Indus, Shatt-al-Arab, Savannah and RhMainKanal (RMDK) and the River Danube, a distance of approximately 4000 km. This voyage has only recently become possible with the opening of the connecting RMDK at the end of 1992, but has been made little use of because of the civil war in the former Yugoslavia.

  19. Occurrence and risk assessment of acidic pharmaceuticals in the Yellow River, Hai River and Liao River of north China.

    Science.gov (United States)

    Wang, Li; Ying, Guang-Guo; Zhao, Jian-Liang; Yang, Xiao-Bing; Chen, Feng; Tao, Ran; Liu, Shan; Zhou, Li-Jun

    2010-07-15

    Pharmaceuticals in the aquatic environment have received great attentions from the general and scientific community due to their potential impacts on ecological and human health. We investigated the occurrence of twelve acidic pharmaceuticals and herbicides (salicylic acid, clofibric acid, ibuprofen, gemfibrozil, fenoprofen, naproxen, ketoprofen, mefenamic acid, tolfenamic acid, diclofenac, meclofenamic acid and indomethacin) in surface waters of the Yellow River, Hai River and Liao River in north China during the wet and dry seasons and assessed the potential risks to aquatic organisms posed by these acidic compounds. Seven acidic compounds were detected in the rivers, including five non-steroidal anti-inflammatory drugs (salicylic acid, ibuprofen, diclofenac, mefenamic acid and naproxen), and two blood lipid regulators (clofibric acid and gemfibrozil). The concentrations for acidic pharmaceuticals in the Yellow River and Liao River were in most cases higher in the dry season than in the wet season, but the concentrations of acidic compounds in the Hai River were generally higher in July than in November. High concentrations of these detected compounds in the Yellow River, Hai River and Liao River were found more frequently at those sites located in metropolitan areas, lower reaches or river confluences. Only diclofenac and ibuprofen were found to have medium to high risks in the three rivers based on the calculated risk quotients. Copyright 2010 Elsevier B.V. All rights reserved.

  20. Grays River Watershed Geomorphic Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Geist, David R

    2005-04-30

    This investigation, completed for the Pacific Northwest National Laboratory (PNNL), is part of the Grays River Watershed and Biological Assessment commissioned by Bonneville Power Administration under project number 2003-013-00 to assess impacts on salmon habitat in the upper Grays River watershed and present recommendations for habitat improvement. This report presents the findings of the geomorphic assessment and is intended to support the overall PNNL project by evaluating the following: The effects of historical and current land use practices on erosion and sedimentation within the channel network The ways in which these effects have influenced the sediment budget of the upper watershed The resulting responses in the main stem Grays River upstream of State Highway 4 The past and future implications for salmon habitat.

  1. Nelson River and Hudson Bay

    Science.gov (United States)

    2002-01-01

    Rivers that empty into large bodies of water can have a significant impact on the thawing of nearshore winter ice. This true-color Moderate Resolution Imaging Spectroradiometer (MODIS) image from May 18, 2001, shows the Nelson River emptying spring runoff from the Manitoba province to the south into the southwestern corner of Canada's Hudson Bay. The warmer waters from more southern latitudes hasten melting of ice near the shore, though some still remained, perhaps because in shallow coastal waters, the ice could have been anchored to the bottom. High volumes of sediment in the runoff turned the inflow brown, and the rim of the retreating ice has taken on a dirty appearance even far to the east of the river's entrance into the Bay. The sediment would have further hastened the melting of the ice because its darker color would have absorbed more solar radiation than cleaner, whiter ice. Image courtesy Jacques Descloitres, MODIS Land Rapid Response Team at NASA GSFC

  2. Lower Duck River Mussel Survey and Inventory

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Duck River flows 290 miles through several major ecoregions before entering the impounded main stem Tennessee River at Sycamore Landing, Tennessee, adjacent to...

  3. Russian River Ice Thickness and Duration

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set consists of river ice thickness measurements, and beginning and ending dates for river freeze-up events from fifty stations in northern Russia. The...

  4. Sprague River Oregon Centerline North Fork 2000

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  5. Colorado River Mile System, Tenths of Miles

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This coverage contains points representing tenth of miles in the GCMRC river mile system. The points fall along the centerline of the Colorado River from Glen Canyon...

  6. Sprague River Oregon Centerline North Fork 1975

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  7. Sprague River Oregon Centerline North Fork 2005

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  8. Sprague River Oregon Centerline South Fork 1975

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  9. Sprague River Oregon Centerline South Fork 1968

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  10. Sprague River Oregon Centerline Sycan 1940

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  11. Sprague River Oregon Centerline North Fork 1968

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  12. Chemical - Elwha River Dam Removal Study

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This study examines the ecosystem response of the Elwha River to the removal of the Elwha River dams. We will measure the following attributes of ecosystem response:...

  13. Geomorphic Analysis - Trinity River Restoration Potential

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The goal of the Trinity River project is to identify the potential positive effects of large-scale restoration actions in a 63 kilometer reach of the Trinity River...

  14. Habitat Analysis - Trinity River Restoration Potential

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The goal of the Trinity River project is to identify the potential positive effects of large-scale restoration actions in a 63 kilometer reach of the Trinity River...

  15. 2010 Hudson River Shallow Water Sediment Cores

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Hudson River Shallow Water Mapping project characterizes the bottom of the Hudson River Estuary in shallow water (<3 m). The characterization includes...

  16. 2010 Hudson River Shallow Water Sediment Grabs

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Hudson River Shallow Water Mapping project characterizes the bottom of the Hudson River Estuary in shallow water (<3 m). The characterization includes...

  17. Minnesota Wild and Scenic River Districts

    Data.gov (United States)

    Minnesota Department of Natural Resources — District boundaries for wild, scenic, and recreational rivers designated under the Minnesota State Wild and Scenic Rivers Act. Includes portions of the Minnesota...

  18. Sprague River Oregon Centerline South Fork 1940

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  19. Physical - Elwha River Dam Removal Study

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This study examines the ecosystem response of the Elwha River to the removal of the Elwha River dams. We will measure the following attributes of ecosystem response:...

  20. Yellow River Delta Faces a Historic Opportunity

    Institute of Scientific and Technical Information of China (English)

    Li Zhen

    2010-01-01

    @@ China's State Council has endorsed the Development Plan of an Efficient Eco-Economic Zone at Yellow River Delta. The plan is meant to create a more ecologically sustainable economic zone along the river delta.

  1. Yellow River Delta Faces a Historic Opportunity

    Institute of Scientific and Technical Information of China (English)

    Li Zhen

    2011-01-01

    @@ China's State Council has endorsed the Development Plan of an Efficient Eco-Economic Zone at Yellow River Delta.The plan is meant to create a more ecologically sustainable economic zone along the river delta.

  2. Savannah River Site Environmental Implentation Plan

    Energy Technology Data Exchange (ETDEWEB)

    1989-08-01

    This report describes the organizational responsibilities for the Savannah River Site Environmental program. Operations, Engineering and projects, Environment, safety, and health, Quality assurance, and the Savannah River Laboratory are described.

  3. On the modelling of river delta formation

    NARCIS (Netherlands)

    Geleynse, N.

    2013-01-01

    This thesis presents approaches to the modelling of river delta formation. In particular, it provides results of numerical stratigraphic-morphodynamic modelling of river delta formation under various environmental forcings.

  4. Sprague River Oregon Centerline South Fork 2000

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  5. Sprague River Oregon Water circa 1870

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the...

  6. Sprague River Oregon Centerline Sycan 1968

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  7. Biological - Elwha River Dam Removal Study

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This study examines the ecosystem response of the Elwha River to the removal of the Elwha River dams. We will measure the following attributes of ecosystem response:...

  8. Sprague River Oregon Centerline South Fork 2005

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  9. Sprague River Oregon Centerline circa 1870

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  10. Sprague River Oregon Centerline Sycan circa 1870

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S....

  11. Global Lake and River Ice Phenology Database

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Global Lake and River Ice Phenology Database contains freeze and thaw/breakup dates as well as other descriptive ice cover data for 865 lakes and rivers in the...

  12. 77 FR 23658 - Six Rivers National Forest, Gasquet Ranger District, California, The Smith River National...

    Science.gov (United States)

    2012-04-20

    ... Smith River National Recreation Area Restoration and Motorized Travel Management Project AGENCY: Forest...-pacificsouthwest-six-rivers@fs.fed.us . Please insure that ``Smith River NRA Restoration and Motorized Travel... UARs totaling 80 miles. The project encompasses the Smith River NRA and Gasquet Ranger...

  13. 75 FR 32351 - Drawbridge Operation Regulation; Taunton River, Fall River and Somerset, MA

    Science.gov (United States)

    2010-06-08

    ... River and Somerset, MA AGENCY: Coast Guard, DHS. ACTION: Notice of proposed rulemaking. SUMMARY: The...) Bridge at mile 1.8, between Fall River and Somerset, Massachusetts, to help relieve the bridge owner from... Taunton River between Fall River and Somerset, Massachusetts, has a vertical clearance in the...

  14. 78 FR 31457 - Drawbridge Operation Regulation; Taunton River, Fall River and Somerset, MA

    Science.gov (United States)

    2013-05-24

    .... USCG-2013-0291] RIN 1625-AA09 Drawbridge Operation Regulation; Taunton River, Fall River and Somerset..., mile 2.1, between Fall River and Somerset, Massachusetts. The bridge owner, Massachusetts Department of... between Somerset and Fall River, Massachusetts, has a vertical clearance of 60 feet at mean high water...

  15. 76 FR 71342 - Proposed CERCLA Administrative Cost Recovery Settlement; River Forest Dry Cleaners Site, River...

    Science.gov (United States)

    2011-11-17

    ... AGENCY Proposed CERCLA Administrative Cost Recovery Settlement; River Forest Dry Cleaners Site, River... proposed administrative settlement for recovery of past response costs concerning the River Forest Dry Cleaners site in River Forest, Cook County, Illinois with the following settling party: Edward...

  16. ALWAYS A RIVER - SUPPLEMENTAL ENVIRONMENTAL EDUCATION CURRICULUM ON THE OHIO RIVER AND WATER GRADES K - 12

    Science.gov (United States)

    This curriculum was developed as a significant component of the project, Always a River: The Ohio River and the American Experience, a six-state collaboration devoted to exploring the historical and cultural development of the Ohio River. The Always a River project is being joint...

  17. Columbia River Component Data Evaluation Summary Report

    Energy Technology Data Exchange (ETDEWEB)

    C.S. Cearlock

    2006-08-02

    The purpose of the Columbia River Component Data Compilation and Evaluation task was to compile, review, and evaluate existing information for constituents that may have been released to the Columbia River due to Hanford Site operations. Through this effort an extensive compilation of information pertaining to Hanford Site-related contaminants released to the Columbia River has been completed for almost 965 km of the river.

  18. SIRIU RESERVOIR, BUZAU RIVER (ROMANIA

    Directory of Open Access Journals (Sweden)

    Daniel Constantin DIACONU

    2008-06-01

    Full Text Available Siriu reservoir, owes it`s creation to the dam built on the river Buzau, in the town which bears the same name. The reservoir has a hydro energetic role, to diminish the maximum flow and to provide water to the localities below. The partial exploitation of the lake, began in 1984; Since that time, the initial bed of the river began to accumulate large quantities of alluvia, reducing the retention capacity of the lake, which had a volume of 125 million m3. The changes produced are determined by many topographic surveys at the bottom of the lake.

  19. Schistosome infection among river rafters on Omo River, Ethiopia.

    Science.gov (United States)

    Schwartz, Eli; Kozarsky, Phyllis; Wilson, Marianna; Cetron, Martin

    2005-01-01

    Adventure trips to Africa have become more frequent, and rafting on some of the great rivers has become almost commonplace. We describe three rafting trips on the Omo River in Ethiopia, after which most of the participants were diagnosed with schistosomiasis. After index cases from the three groups came to medical attention, active surveillance detected outbreaks of illness in a group of American travelers (n = 18 ) in 1993 and in two groups of Israeli travelers in 1997 (n = 26). Of 44 travelers, 37 were screened and 28 (76%) were infected, all with Schistosoma mansoni. Among the infected patients, 16 of 28 (57%) were symptomatic, the most frequent manifestation being fever, which occurred in 14 of 25 (56%); cough occurred in 6 of 18 (33%). Diagnosis was based on FAST-enzyme-linked immunosorbent assay, with confirmation by immunoblot. Other rafting trips on the Omo River sponsored by the same tour companies did not result in symptomatic infection. Investigation of the rafting itineraries suggested the route may have been altered from the usual for these three groups, exposing them to a part of the river that is wider, slower moving, and more densely populated. Schistosomiasis should be considered in febrile patients following rafting trips in schistosome-endemic areas. As asymptomatic schistosomiasis in travelers is also common (43% in this series), all travelers exposed to freshwater in endemic areas should be encouraged to undergo serologic screening.

  20. The science and practice of river restoration

    Science.gov (United States)

    Wohl, Ellen; Lane, Stuart N.; Wilcox, Andrew C.

    2015-08-01

    River restoration is one of the most prominent areas of applied water-resources science. From an initial focus on enhancing fish habitat or river appearance, primarily through structural modification of channel form, restoration has expanded to incorporate a wide variety of management activities designed to enhance river process and form. Restoration is conducted on headwater streams, large lowland rivers, and entire river networks in urban, agricultural, and less intensively human-altered environments. We critically examine how contemporary practitioners approach river restoration and challenges for implementing restoration, which include clearly identified objectives, holistic understanding of rivers as ecosystems, and the role of restoration as a social process. We also examine challenges for scientific understanding in river restoration. These include: how physical complexity supports biogeochemical function, stream metabolism, and stream ecosystem productivity; characterizing response curves of different river components; understanding sediment dynamics; and increasing appreciation of the importance of incorporating climate change considerations and resiliency into restoration planning. Finally, we examine changes in river restoration within the past decade, such as increasing use of stream mitigation banking; development of new tools and technologies; different types of process-based restoration; growing recognition of the importance of biological-physical feedbacks in rivers; increasing expectations of water quality improvements from restoration; and more effective communication between practitioners and river scientists.

  1. 33 CFR 117.300 - Manatee River.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Manatee River. 117.300 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Florida § 117.300 Manatee River. The draw of the CSX Railroad Bridge across the Manatee River, mile 4.5 Bradenton, operates as follows: (a) The bridge is...

  2. Setting targets in strategies for river restoration

    NARCIS (Netherlands)

    Pedroli, G.B.M.; Blust, de G.; Looy, van K.; Rooij, van S.A.M.

    2002-01-01

    Since about 90% of the natural floodplain area of rivers in Europe has been reclaimed and now lacks river dynamics, nature rehabilitation along rivers is of crucial importance for the restoration of their natural function. Flood protection, self-purification of surface water, groundwater recharge, s

  3. The social side of river management

    NARCIS (Netherlands)

    Groot, de W.T.; Warner, J.F.

    2011-01-01

    River management faces many challenges world-wide including climate change, flood risks and the demand for more adaptive and 'ecosystem-based' systems. Instead of raising the dikes even higher, the new adage for river managers is to give the rivers more space to drain their waters. This in turn impl

  4. 77 FR 23120 - Special Local Regulations; Lowcountry Splash Open Water Swim, Wando River and Cooper River, Mount...

    Science.gov (United States)

    2012-04-18

    ... Swim, Wando River and Cooper River, Mount Pleasant, SC AGENCY: Coast Guard, DHS. ACTION: Temporary... Wando River and Cooper River in Mount Pleasant, South Carolina during the Lowcountry Splash, a 2.4 mile... the Lowcountry Splash, a 2.4 mile open water swim in the Wando River and Cooper River along...

  5. RiverCare: towards self-sustaining multifunctional rivers

    Science.gov (United States)

    Augustijn, Denie; Schielen, Ralph; Hulscher, Suzanne

    2014-05-01

    Rivers are inherently dynamic water systems involving complex interactions among hydrodynamics, morphology and ecology. In many deltas around the world lowland rivers are intensively managed to meet objectives like safety, navigation, hydropower and water supply. With the increasing pressure of growing population and climate change it will become even more challenging to reach or maintain these objectives and probably also more demanding from a management point of view. In the meantime there is a growing awareness that rivers are natural systems and that, rather than further regulation works, the dynamic natural processes should be better utilized (or restored) to reach the multifunctional objectives. Currently many integrated river management projects are initiated all over the world, in large rivers as well as streams. Examples of large scale projects in the Netherlands are 'Room for the River' (Rhine), the 'Maaswerken' (Meuse), the Deltaprogramme and projects originating from the European Water Framework Directive (WFD). These projects include innovative measures executed never before on this scale and include for example longitudinal training dams, side channels, removal of bank protection, remeandering of streams, dredging/nourishment and floodplain rehabilitation. Although estimates have been made on the effects of these measures for many of the individual projects, the overall effects on the various management objectives remains uncertain, especially if all projects are considered in connection. For all stakeholders with vested interests in the river system it is important to know how that system evolves at intermediate and longer time scales (10 to 100 years) and what the consequences will be for the various river functions. If the total, integrated response of the system can be predicted, the system may be managed in a more effective way, making optimum use of natural processes. In this way, maintenance costs may be reduced, the system remains more natural

  6. Profiling river surface velocities and volume flow estimation with bistatic UHF RiverSonde radar

    Science.gov (United States)

    Barrick, D.; Teague, C.; Lilleboe, P.; Cheng, R.; Gartner, J.; ,

    2003-01-01

    From the velocity profiles across the river, estimates of total volume flow for the four methods were calculated based on a knowledge of the bottom depth vs position across the river. It was found that the flow comparisons for the American River were much closer, within 2% of each other among all of the methods. Sources of positional biases and anomalies in the RiverSonde measurement patterns along the river were identified and discussed.

  7. 33 CFR 165.150 - New Haven Harbor, Quinnipiac River, Mill River.

    Science.gov (United States)

    2010-07-01

    ... River, Mill River. 165.150 Section 165.150 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF... New Haven Harbor, Quinnipiac River, Mill River. (a) The following is a regulated navigation area: The... 303°T to point D at the west bank of the mouth of the Mill River 41°18′05″ N, 72°54′23″ W thence...

  8. A Review of Integrated River Basin Management for Sarawak River

    Directory of Open Access Journals (Sweden)

    Kuok K. Kuok

    2011-01-01

    Full Text Available Problem statement: Sarawak River was a life-sustaining water source for the residents in Kuching City and surrounding areas. Raw water is treated at Batu Kitang Water Treatment Plant (BKWTP that supplies more than 98% of the total water production in Kuching City. The raw water supply to BKWTP is not adequate to meet the ever increasing water demand. In order to overcome this problem, four projects had been implemented along Sarawak River for managing and securing water supply to BKWTP. Approach: These four projects are construction of 1.5m height storage weir across Sungai Sarawak Kiri river channel, Kuching Barrage and Shiplock, Bengoh Dam and Kuching Centralized Wastewater Management System (KCWMS. In 2005, 1.5 m height submersible weir was constructed across Sungai Sarawak Kiri channel for increasing the safe yield that can last until year 2010. Kuching Barrage and Shiplock were commissioned in 2000 as barrier to avoid the saline intrusion reaching upper catchment. 24 telemetry stations were installed along Sarawak River for monitoring and regulating the water level. This will preserve high quality water storage at upper catchment of Sarawak River. In year 2010, Bengoh Dam was constructed to ensure adequate raw water will be supplied to BKWTP for meeting the increasing water demand from 2010-2030. This reservoir will store 144 million m3 of fresh water covering reservoir area of 8.77km2. Beyond 2030, the water supply shall not depend solely on fresh water. Results: Black and grey water in Sarawak Catchment was treated through Kuching Centralized Wastewater Management System (KCWMS and recycled for daily used. Conclusion: The treated water that comply Standard A water quality, can distribute for domestic, industrial and irrigation used in nearest future. This will reduce the water demand solely on raw water and create a sustainable living in Kuching City. Beyond 2030, a few alternatives are also proposed for conserving and

  9. Depth of the base of the Jackson aquifer, based on geophysical exploration, southern Jackson Hole, Wyoming, USA

    Science.gov (United States)

    Nolan, Bernard T.; Campbell, David L.; Senterfit, Robert M.

    A geophysical survey was conducted to determine the depth of the base of the water-table aquifer in the southern part of Jackson Hole, Wyoming, USA. Audio-magnetotellurics (AMT) measurements at 77 sites in the study area yielded electrical-resistivity logs of the subsurface, and these were used to infer lithologic changes with depth. A 100-600ohm-m geoelectric layer, designated the Jackson aquifer, was used to represent surficial saturated, unconsolidated deposits of Quaternary age. The median depth of the base of the Jackson aquifer is estimated to be 200ft (61m), based on 62 sites that had sufficient resistivity data. AMT-measured values were kriged to predict the depth to the base of the aquifer throughout the southern part of Jackson Hole. Contour maps of the kriging predictions indicate that the depth of the base of the Jackson aquifer is shallow in the central part of the study area near the East and West Gros Ventre Buttes, deeper in the west near the Teton fault system, and shallow at the southern edge of Jackson Hole. Predicted, contoured depths range from 100ft (30m) in the south, near the confluences of Spring Creek and Flat Creek with the Snake River, to 700ft (210m) in the west, near the town of Wilson, Wyoming. Résumé Une campagne géophysique a été entreprise pour préciser la profondeur du mur de l'aquifère dans le secteur sud de Jackson Hole (Wyoming, États-Unis). Des mesures audio-magnétotelluriques (audio MT) sur 77 sites de ce secteur ont fourni des logs de résistivitéélectrique du sous-sol ; les variations de la lithologie en fonction de la profondeur en ont été déduites. Un niveau géoélectrique à 100-600ohm.m, dénommé "aquifère de Jackson", a servi à définir des dépôts superficiels quaternaires saturés en eau et non consolidés. La profondeur médiane de la base de l'aquifère de Jackson est de l'ordre de 61m, à partir des 62 sites ayant fourni suffisamment de données de résistivité. Les valeurs audio MT mesur

  10. Modelling river history and evolution.

    Science.gov (United States)

    Coulthard, T J; Van de Wiel, M J

    2012-05-13

    Over the last few decades, a suite of numerical models has been developed for studying river history and evolution that is almost as diverse as the subject of river history itself. A distinction can be made between landscape evolution models (LEMs), alluvial architecture models, meander models, cellular models and computational fluid dynamics models. Although these models share some similarities, there also are notable differences between them, which make them more or less suitable for simulating particular aspects of river history and evolution. LEMs embrace entire drainage basins at the price of detail; alluvial architecture models simulate sedimentary facies but oversimplify flow characteristics; and computational fluid dynamics models have to assume a fixed channel form. While all these models have helped us to predict erosion and depositional processes as well as fluvial landscape evolution, some areas of prediction are likely to remain limited and short-term owing to the often nonlinear response of fluvial systems. Nevertheless, progress in model algorithms, computing and field data capture will lead to greater integration between these approaches and thus the ability to interpret river history more comprehensively.

  11. Stochastic modelling of river morphodynamics

    NARCIS (Netherlands)

    Van Vuren, B.G.

    2005-01-01

    Modern river management has to reconcile a number of functions, such as protection against floods and provision of safe and efficient navigation, floodplain agriculture, ecology and recreation. Knowledge on uncertainty in fluvial processes is important to make this possible, to design effective rive

  12. Health evaluation indicator system for urban landscape rivers, case study of the Bailianjing River in Shanghai

    Science.gov (United States)

    Wang, Juan; Wang, Yue; Yang, Haizhen; Lu, Zhibo; Xu, Xiaotian

    2010-11-01

    The River Bailianjing is an iconic landscape feature known to all residents in Pudong area and running through the Shanghai Expo 2010 Park. The river and its basin was a complex living ecosystem which supports a unique variety of flora and fauna several decades ago. However, as a result of unsuccessful pollution source control, sewage and first flow of the storm water is directly coming into the river in some catchment. The water quality of the river is seriously organically polluted now. The typical organic pollutants are COD, NH3-N, TN and TP, which cause the extinction of the water plants and aquatic. Furthermore, the artificial hard river banks isolate the river course and the land, which damaged the whole ecological system totally. The nature of the River Bailianjing and its history has resulted in many government departments and authorities and non government organizations having jurisdiction and/or an interest in the river's management. As a new tool to improve river management, the river health assessment has become the major focus of ecological and environmental science. Consequently, research on river health evaluation and its development on river management are of great theoretical and practical significance. In order to evaluate the healthy status of the River Bailianjing and prepare comprehensive scientific background data for the integrated river ecological rehabilitation planning, the health evaluation indicator system for River Bailianjing is brought forward. The indicator system has three levels: the first is target layer; the second is criteria layer, including five fields: water quality characteristics, hydrology characteristics, river morphology, biological characteristics and river scenic beauty; the third is an index layer, a total of 15 specific indicators included. Fuzzy AHP method is used to evaluate the target river's health status, and five grades are set up to describe it: healthy, sub health, marginal, unhealthy and pathological. The

  13. MICROPHYTOBENTHOS IN THE SUTLA RIVER

    Directory of Open Access Journals (Sweden)

    Marija Tomec

    2009-10-01

    Full Text Available The Sutla river is a river along Croatian/Slovenian border. Its length is about 91 km, out of which 89 km in Croatia. Microphytobenthos investigations have been performed at six locations along the Sutla river on Croatian territory. Samples were collected from specific areas of characteristic habitats. Beside sample collection, basic physico–chemical parameters were measured: water temperature, pH values and quantity of water dissolved oxygen. Water temperature changed depending on air temperature and the depth of the river, ranging from 5.1ºC to 6.3ºC. pH values were between 7.77 and 8.14, and dissolved oxygen concentrations (mg/L O2 at the six locations ranged between 8.6 mg/L and 14.9 mg/L. Quantitative microphytobenthos composition comprised 87 microphythic species belonging to the systematic groups of Bacteriophyta, Cyanobacteria and Chrysophyta (Bacillariophyceae and Xanthophyceae. The most numerous group were the diatoms or Bacillariophyceae (76 species or 88.3%, with dominance of the species of the genera Achnanthes, Cocconeis, Cymbella, Gomphonema, Navicula, Nitzschia and Surirella. The group Cyanobacteria was represented with relatively small number of species (9 species or 10%, with the dominance of filamentous algae belonging to the genus Phormidium. From the total number of the determined microphytobenthic species, 73 species or 84% were indicators of saprobity. Most of them were beta–mezosaprobic indicators. Based on the indicator values of determined microphytobenthic species at six investigated locations, P–B saprobity index was in the range from 1.8 to 2.0. These values suggested that the water at the investigated part of the Sutla river belonged to the second class of Croatian Water Quality Directive.

  14. HANFORD SITE RIVER CORRIDOR CLEANUP

    Energy Technology Data Exchange (ETDEWEB)

    BAZZELL, K.D.

    2006-02-01

    In 2005, the US Department of Energy (DOE) launched the third generation of closure contracts, including the River Corridor Closure (RCC) Contract at Hanford. Over the past decade, significant progress has been made on cleaning up the river shore that bordes Hanford. However, the most important cleanup challenges lie ahead. In March 2005, DOE awarded the Hanford River Corridor Closure Contract to Washington Closure Hanford (WCH), a limited liability company owned by Washington Group International, Bechtel National and CH2M HILL. It is a single-purpose company whose goal is to safely and efficiently accelerate cleanup in the 544 km{sup 2} Hanford river corridor and reduce or eliminate future obligations to DOE for maintaining long-term stewardship over the site. The RCC Contract is a cost-plus-incentive-fee closure contract, which incentivizes the contractor to reduce cost and accelerate the schedule. At $1.9 billion and seven years, WCH has accelerated cleaning up Hanford's river corridor significantly compared to the $3.2 billion and 10 years originally estimated by the US Army Corps of Engineers. Predictable funding is one of the key features of the new contract, with funding set by contract at $183 million in fiscal year (FY) 2006 and peaking at $387 million in FY2012. Another feature of the contract allows for Washington Closure to perform up to 40% of the value of the contract and subcontract the balance. One of the major challenges in the next few years will be to identify and qualify sufficient subcontractors to meet the goal.

  15. The river model of black holes

    CERN Document Server

    Hamilton, A J S; Hamilton, Andrew J. S.; Lisle, Jason P.

    2004-01-01

    This paper presents a new way to conceptualize stationary black holes, which we call the river model. The river model is mathematically sound, yet simple enough that the basic picture can be understood by non-experts. In the river model, space itself flows like a river through a flat background, while objects move through the river according to the rules of special relativity. In a spherical black hole, the river of space falls into the black hole at the Newtonian escape velocity, hitting the speed of light at the horizon. Inside the horizon, the river flows inward faster than light, carrying everything with it. We show that the river model works also for rotating (Kerr-Newman) black holes, though with a surprising twist. As in the spherical case, the river of space can be regarded as moving through a flat background. However, the river does not spiral inward, as one might have anticipated, but rather falls inward with no azimuthal swirl at all. Instead, the river has at each point not only a velocity but als...

  16. Operação de Fontan-Kreutzer em anomalias cardíacas complexas outras que não atresia tricúspide lb, ventrículo único e atresia pulmonar com septo ventricular íntegro The operation of Fontan-Kreutzer in complex congenital anomalies other than lb isolated tricuspid atresia, single ventricle and pulmonary atresia with intact septum

    Directory of Open Access Journals (Sweden)

    Miguel Barbero-Marcial

    1988-08-01

    Full Text Available Oitenta e quatro pacientes foram submetidos a operação tipo Fontan, no Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, entre 1979 e 1989; as idades variaram entre 5 meses e 31 anos. Estes pacientes foram colocados em 5 grupos anatômicos: 1 atresia tricúspide la, 3 pacientes (1 óbito, 33,3%; 2 atresia tricúspide lb, 48 pacientes (5 óbitos, 10,4%; 3 ventrículo único: 18 pacientes (2 óbitos, 11,1%; 4 atresia pulmonar com septo interventricular íntegro, 5 pacientes (1 óbito, 20,0%; 5 anomalias complexas, 10 pacientes (zero óbitos. O grupo das anomalias complexas foi dividido em 2 subgrupos: pacientes com situs solitus e pacientes com situs inversus. A maioria destes pacientes foi submetida a procedimentos adicionais: em 5 pacientes, uma das valvas A-V foi fechada; em 1 paciente, foram realizadas valvoplastia mitral e septação do átrio único; em 1 paciente, foi realizada a secção de feixe anômalo (feixe de Kent. A evolução tardia (6 meses a 8 anos revelou que 9 pacientes encontram-se em classe funcional I e 1 na classe funcional II (NYHA. Baseados nos resultados obtidos, concluímos que a operação de Fontan modificada é uma alternativa válida em anomalias cianóticas complexas.Between 1979 and 1989, 84 patients underwent a Fontan operation or one of its modifications; the ages ranged from 5 months to 31 years. Patients were placed into five anatomic groups: 1 tricuspid atresia la (3 cases, 1 death, 33.3%; 2 tricuspid atresia lb (48 cases, 5 deaths, 10.4%; 3 single ventricle (18 cases, 2 deaths, 11.1%; 4 pulmonary atresia, intact ventricular septum (5 cases, 1 death, 20.0%; 5 complex anomalies (10 cases, no deaths. The subgroup of complex anomalies was divided in: with situs inversus and with situs solitus. In the majority of these patients, additional procedures were performed; in 5, one A-V valve was closed; in 2, complex atrial septation was done; in 1, a mitral

  17. Research on the river function regionalization

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    Objectives, principles, classification system, zoning method and procedure of river function region-alization were investigated systematically based on the present status of modern river regulation and function requirement. Considering the ecosystem continuity and river function integrality, a river is suggested to be divided into five function zones: ecological protection zone, habitat restoration zone, exploitation and utilization zone, buffer zone,and transition zone, based on the developed intensity and the function characteristics of the river. In this paper, not only the five function zones were described qualitatively, but also the quantitative examination method on how to identify their function zone types was given. A double-criterion partitioning scheme was proposed according to the functional zoning diagram constructed by the evaluation of the social and ecological function of rivers. Finally, the procedures of river function regionalization were shown.

  18. A contribuição da dança do ventre para a educação corporal, saúde física e mental de mulheres que freqüentam uma academia de ginástica e dança La contribución de la danza del vientre para la educación corporal, salud física y mental de mujeres que van a la academia de gimnasia y danza The contribution of belly dance to body education, physical and mental health of women who go to the gym or dance

    Directory of Open Access Journals (Sweden)

    Ana Carla Peto Abrão

    2005-04-01

    Full Text Available O estudo teve por objetivo investigar os benefícios da dança do ventre para a saúde de mulheres que freqüentam uma academia de dança do interior do Estado de São Paulo. Trata-se de um estudo qualitativo. Os referenciais foram a experiência dos pesquisadores e outras literaturas da área de dança. A amostra foi constituída por 12 mulheres com faixa etária de 16 a 40 anos, que praticavam dança do ventre há mais de três meses, às quais foi aplicado um questionário com perguntas abertas. A análise foi feita por meio dos conteúdos das respostas, o que possibilitou a conclusão de que a dança do ventre é um método que traz benefícios para a educação integral e leva à valorização da vida, melhorando a saúde e a qualidade de vida dessas mulheres.La finalidad de este estudio fue investigar los beneficios de la danza del vientre para la salud de mujeres que van a una academia de danza en el interior de la provincia de São Paulo. Se trata de un estudio cualitativo. Los referenciales fueron la experiencia de los investigadores y otras literaturas del área de la danza. La muestra fue constituida por 12 mujeres con edad entre 16 y 40 años, que practicaban danza del vientre hace más de tres meses, a las cuales fue aplicado un cuestionario con preguntas abiertas. El análisis de las respuestas demostró que la danza del vientre trae beneficios para la educación integral, que resulta en la valoración de la vida, mejorando la salud y la calidad de vida de estas mujeres.This qualitative study aimed to examine the benefits of belly dance for the health of women who go to a gym in the interior of São Paulo state, Brazil and was based on the researchers' experience and other literature on dancing. The references were the experience of the researcher and other literature on the dance area. The sample consisted of 12 women from 16 to 40 years of age who practiced belly dance for more than three months, who received a questionnaire with

  19. Initial river test of a monostatic RiverSonde streamflow measurement system

    Science.gov (United States)

    Teague, C.C.; Barrick, D.E.; Lilleboe, P.M.; Cheng, R.T.; ,

    2003-01-01

    A field experiment was conducted on May 7-8, 2002 using a CODAR RiverSonde UHF radar system at Vernalis, California on the San Joaquin River. The monostatic radar configuration on one bank of the river, with the antennas looking both upriver and downriver, provided very high-quality data. Estimates of both along-river and cross-river surface current were generated using several models, including one based on normal-mode analysis. Along-river surface velocities ranged from about 0.6 m/s at the river banks to about 1.0 m/s near the middle of the river. Average cross-river surface velocities were 0.02 m/s or less.

  20. Constructing river stage-discharge rating curves using remotely sensed river cross-sectional inundation areas and river bathymetry

    Science.gov (United States)

    Pan, Feifei; Wang, Cheng; Xi, Xiaohuan

    2016-09-01

    Remote sensing from satellites and airborne platforms provides valuable data for monitoring and gauging river discharge. One effective approach first estimates river stage from satellite-measured inundation area based on the inundation area-river stage relationship (IARSR), and then the estimated river stage is used to compute river discharge based on the stage-discharge rating (SDR) curve. However, this approach is difficult to implement because of a lack of data for constructing the SDR curves. This study proposes a new method to construct the SDR curves using remotely sensed river cross-sectional inundation areas and river bathymetry. The proposed method was tested over a river reach between two USGS gauging stations, i.e., Kingston Mines (KM) and Copperas Creek (CC) along the Illinois River. First a polygon over each of two cross sections was defined. A complete IARSR curve was constructed inside each polygon using digital elevation model (DEM) and river bathymetric data. The constructed IARSR curves were then used to estimate 47 river water surface elevations at each cross section based on 47 river inundation areas estimated from Landsat TM images collected during 1994-2002. The estimated water surface elevations were substituted into an objective function formed by the Bernoulli equation of gradually varied open channel flow. A nonlinear global optimization scheme was applied to solve the Manning's coefficient through minimizing the objective function value. Finally the SDR curve was constructed at the KM site using the solved Manning's coefficient, channel cross sectional geometry and the Manning's equation, and employed to estimate river discharges. The root mean square error (RMSE) in the estimated river discharges against the USGS measured river discharges is 112.4 m3/s. To consider the variation of the Manning's coefficient in the vertical direction, this study also suggested a power-law function to describe the vertical decline of the Manning

  1. Concentrations and fluxes of uranium in two major Chinese rivers: The Changjiang River and the Huanghe River

    Science.gov (United States)

    Zhou, Jing; Du, Jinzhou; Moore, Willard S.; Qu, Jianguo; Zhang, Guiling

    2015-01-01

    We collected samples from January 2010 to December 2011 to determine the concentrations and fluxes of uranium in the Changjiang (Yangtze) and Huanghe (Yellow) Rivers in China. The dissolved U concentrations (DUC) were measured by inductively coupled plasma mass spectrometry (ICP-MS) at the freshwater end members of the Changjiang and Huanghe Rivers. The DUCs ranged from 1.32 to 4.06 nmol/L and 13.85 to 29.99 nmol/L in the Changjiang and Huanghe Rivers, respectively. The temporal variations of DUC followed the seasonal change, with high values in the two rivers occurring during the dry seasons and low values during the flood seasons. A strong negative correlation was observed between DUC and discharge in the Changjiang River (R2 = 0.69), but a weak correlation (R2 = 0.35) was found in the Huanghe River. The correlations between the major ions and the U in the rivers indicated that the primary source of uranium was from the weathering of carbonate and evaporite in the Changjiang Basin. The weathering of evaporite-bearing sequences and the erosion of loess dominated the U sources of the Huanghe River. Carbonate ligands in the dry season and phosphate ligands in the wet season were the primary factors controlling the accumulation and transportation of dissolved uranium in the Changjiang River. The soils of the Huanghe Basin contained five times more leachable uranium compared to the soils of the Changjiang Basin, which may explain the high DUC in the Huanghe River. The weighted-mean-concentrations of uranium were 2.78 nmol/L in the Changjiang River and 22.07 nmol/L in the Huanghe River. This lead to annual dissolved U fluxes (DUF) of 2.3 × 106 mol/yr in the Changjiang River and 4.1 × 105 mol/yr in the Huanghe River. The sum of the U fluxes in the two rivers represented 11.9% of the global U riverine flux into the sea comparing with 2.5% of the global runoff into the sea. The 234U/238U activity ratio of the Huanghe River had higher values (1.455-1.418) compared to the

  2. Mutagenicities of Bangkok and Tokyo river waters.

    Science.gov (United States)

    Kusamran, W R; Wakabayashi, K; Oguri, A; Tepsuwan, A; Nagao, M; Sugimura, T

    1994-11-01

    Samples of water from the Chao Phraya river and some connected canals in Bangkok, Thailand, and from the Sumida and Ara rivers in Tokyo, Japan, were tested for mutagenicity using blue rayon to adsorb the mutagens. The samples from the Chao Phraya river and connected canals at sites located 50-150 km from the river mouth taken in May 1993 showed a mutagenicity of 87-1213 revertants per 0.05 g blue rayon extract towards S. typhimurium YG1024 in the presence of S9 mix. Samples from most sites taken in December 1993, which follows the rainy season, showed a lower mutagenicity than those taken in May, possibly due to dilution by the larger volume of water in the river and canals in December. Water samples from the Sumida river were collected in July 1993 and February 1994, and those from the Ara river in January 1994. Mutagenicity of samples from all sites of the Sumida and Ara rivers, which were located 2-30 and 2-20 km, respectively, from the river mouth was also clearly detected in the presence of S9 mix and did not differ much, being 155-748 revertants of YG1024 per 0.05 g blue rayon extract. These results demonstrated that the water in all three rivers contained some frameshift mutagens.

  3. Relating river discharges to salinity changes

    Science.gov (United States)

    Xie, X.; Liu, W. T.

    2014-12-01

    New river discharge data are brought together with spacebased sea surface salinity measurements by Aquarius and SMOS to demonstrate the role of river discharge in salinity changes near three river mouths: the Mississippi, the Ganges, and the Amazon. The characteristics of the seasonal cycle and the year-to-year changes of the river runoff are described. Various versions of the satellite salinity data are compared. The relative roles of river discharge, surface water flux, and horizontal advection in changing surface salinity in regions near the river mouths are examined. Satellite measurements of SSS clearly track movements of the fresh water from river discharges. Besides the river discharge, E-P plays an important role in the seasonal salinity variation near the Ganges and Irrawaddy River mouths. For the Mississippi and Amazon river mouths, central and eastern ITCZ, E-P contributes very little to the salinity seasonal change. In the central and eastern ITCZ, contribution of advection to the salinity tendency is clearly identified. Both salinity and salinity tendency are dominated by semi-annual cycle in the Atlantic ITCZ between 5ºN to 9ºN, whereas annual cycle dominates at other latitudes.

  4. Quantificação da massa infartada do ventrículo esquerdo pela ressonância magnética cardíaca: comparação entre a planimetria e o método de escore visual semi-quantitativo Quantification of left ventricular infarcted mass on cardiac magnetic resonance imaging: comparison between planimetry and the semiquantitative visual scoring method

    Directory of Open Access Journals (Sweden)

    Clerio Francisco de Azevedo Filho

    2004-08-01

    Full Text Available OBJETIVO: Validar um novo método de escore visual semi-quantitativo contra a planimetria digital quantitativa para a determinação da massa infartada do ventrículo esquerdo pela ressonância magnética cardíaca com técnica de realce tardio. MÉTODO: Estudados 77 pacientes com infarto miocárdico prévio em aparelho de ressonância magnética de 1,5T utilizando técnica de realce tardio para avaliação da viabilidade miocárdica e cálculo da massa infartada. Para avaliação da função ventricular esquerda pelo método de Simpson utilizamos técnica de cine-ressonância. O cálculo da massa infartada foi realizado nas imagens de realce tardio de duas formas: planimetria e método de escore. Utilizamos métodos de regressão linear simples, correlação e concordância entre métodos e observadores segundo a análise de Bland-Altman. RESULTADOS: Em todos os 77 pacientes as áreas de infarto foram detectadas pela ressonância magnética cardíaca utilizando a técnica de realce tardio. O tamanho do infarto medido pela planimetria foi semelhante ao obtido pelo método de escore, com a média das diferenças entres as medidas de apenas 1,03% da massa do ventrículo esquerdo. As variabilidades inter (0,41% e intra-observador (0,34% evidenciaram excelente reprodutibilidade do método de escore. A massa infartada apresentou boa correlação com a fração de ejeção e volumes distólico e sistólico finais indexados, r=-0,76, r=0,63 e r=0,67, respectivamente. CONCLUSÃO: A avaliação de pacientes com infarto agudo do miocárdio prévio pela ressonância magnética cardíaca, utilizando a técnica de realce tardio, permite a determinação reprodutível do tamanho do infarto, tanto pelo método de planimetria, quanto pelo modelo semi-quantitativo de escore.OBJECTIVE: To compare a new semiquantitative visual scoring method with quantitative digital planimetry for determining left ventricular infarcted mass by use of cardiac delayed contrast

  5. Modeling Water Quality in Rivers

    Directory of Open Access Journals (Sweden)

    Liren Yu

    2005-01-01

    Full Text Available This study reports a PC software, used in a Windows-based environment, which was developed based on the first order reaction of Biological Oxygen Demand (BOD and a modified Streeter and Phelps equation, in order to simulate and determine the variations of Dissolved Oxygen (DO and of the BOD along with the studied river reaches. The software considers many impacts of environmental factors, such as the different type of discharges (concentrated or punctual source, tributary contribution, distributed source, nitrogenous BOD, BOD sedimentation, photosynthetic production and benthic demand of oxygen, and so on. The software has been used to model the DO profile along one river, with the aim to improve the water quality through suitable engineering measure.

  6. Resilience of river flow regimes.

    Science.gov (United States)

    Botter, Gianluca; Basso, Stefano; Rodriguez-Iturbe, Ignacio; Rinaldo, Andrea

    2013-08-06

    Landscape and climate alterations foreshadow global-scale shifts of river flow regimes. However, a theory that identifies the range of foreseen impacts on streamflows resulting from inhomogeneous forcings and sensitivity gradients across diverse regimes is lacking. Here, we derive a measurable index embedding climate and landscape attributes (the ratio of the mean interarrival of streamflow-producing rainfall events and the mean catchment response time) that discriminates erratic regimes with enhanced intraseasonal streamflow variability from persistent regimes endowed with regular flow patterns. Theoretical and empirical data show that erratic hydrological regimes typical of rivers with low mean discharges are resilient in that they hold a reduced sensitivity to climate fluctuations. The distinction between erratic and persistent regimes provides a robust framework for characterizing the hydrology of freshwater ecosystems and improving water management strategies in times of global change.

  7. Sedimentation Study on Upstream Reach of Selected Rivers in Pahang River Basin, Malaysia

    Directory of Open Access Journals (Sweden)

    Mohd Khairul Amri Kamarudin

    2017-02-01

    Full Text Available The sedimentation study on the upstream reach of Pahang River is located in the Bentong River Basin. The detail hydrographic survey for each river in the Bentong River Basin was carried out in May 2016. Nine stations were selected to represent the sediment concentration at Bentong River, Pahang, Malaysia. Bentong River Basin is one of the river catchment in Pahang River Basin, Malaysia. Before this, Bentong River deterioration in water quality, resulting from the sedimentation problems and unsustainable development management around the river basin. This study was implemented to prove the sedimentation problem, especially the formation of Total  Suspended Solid (TSS in the Bentong River. There are two important parameters were quantified in this study such as the concentration of suspended solid (mg/L and the river discharge (Q values (m³/s. The method used in this study to analysis the concentration of TSS using Gravimetric Method. The result showed the sedimentation in the Bentong River was unstable and the highest of TSS up to 367.6 mg/L that is categorized under the class V which > 300 mg/L based on the National Water Quality Standard (NWQS result showed the coefficient correlation between the observed Q and the TSS concentration in the Bentong River is significant R² = 0.919, there are strong positive relationship between TSS concentration production and the river discharge value in the Bentong River. The study found that the contributors to the high sedimentation problems resulting from the sediments generated from the unsustainable land use, which effectively trapping the bed sediments, rainfall intensity, backflow that carries out high sediments as well as sedimentation produced due to the river bank erosion.

  8. Relationship to the River: The Case of the Muar River Community

    Directory of Open Access Journals (Sweden)

    Bahaman A. Samah

    2011-01-01

    Full Text Available Problem statement: Muar River which located in Johor, is an important river in Malaysia. Previously Muar River had a huge influence on the socio-economic status of the community. It has been used as the sources of income, protein and as well as the major mode of transportation for the community and traders. However, does the Muar River still has that influences on this modern day? The answer of this pertinent question will fulfill the main objective of this study which is to discover Muar River relationship with its surrounding community. Approach: In addition to relationship with the river, this quantitative study was conducted to determine the Muar River community agreement towards initiative to develop the river. A total of 300 respondents from 19 villages along Muar River were selected based on the simple random sampling. Results: Based on the analysis of the results, it can be concluded that Muar River still has a lot to offer to its surrounding community especially for the recreational activities (fish and prawn fishing. A large majority of Muar River community have a moderate and high level of agreement towards the river development. Further analysis performed revealed that income per month, number of household, age, distance to Muar River and period of staying in the areas had significant relationships with agreement towards river development. Conclusion/Recommendations: It is recommended that additional recreational facilities can be added, events at national and international level especially on fish and prawn fishing can be held at Muar River and campaign on the importance of river development and the danger of river pollution can be conducted.

  9. DYNAMIC RESOURCES OF RIVER SEDIMENTS

    Institute of Scientific and Technical Information of China (English)

    George GERGOV; Tzviatka KARAGIOZOVA

    2005-01-01

    The currently enforced Bulgarian water legislation [the Water Act (1999),the Environmental Protection Act (2002),etc.] requires conducting special studies for accurate assessments of sand and gravel flux along the rivers,prior to the issue of the license for operation of the quarries,where they will be dredged. The activity of a quarry necessitates special investigations because of the large dimensions of the damages inflicted on the environment. Ours studies have shown that there are two types of river reaches,in which abstracion of sand and gravel is performed. The first one refers usually to the plain area river reaches. The other type is mountainous with high rate of sediment load,which consists of coarse solid matter. The "on-the-spot" study on the environmental impact of the sand and gravel dredging has revealed that in the area of the quarry the riverbed cuts into the alluvial sediments to about 6-7 m and this ditch has spread by attenuation at a distance of more than 25 km upstream. Downstream the pit the picture is replicated and at the 8th km a local scour on the riverbed,amounting to more than 1.80 - 2.00 m,has been measured near the foundation of a massive bridge in the centre of city of Plovdiv. Such assessments of dynamic resources of sand and gravel materials are expected to serve for the purposes of gradual limitation of this activity in river sections close to renewable resources. The amount of sediment load,which may be abstracted in the area of the Orizare quarry in Bulgaria on a yearly basis has been calculated as 6000 m3/a. It ensures that the resources will not be exhausted and irreversible distortion of the riverbed will be prevented. This is an environmentally safe limit.

  10. The Song of the River

    Institute of Scientific and Technical Information of China (English)

    M.S.Maugham; 范海祥

    2007-01-01

    @@ You hear it all along the river. You hear it, loud and strong, from the rowers as they urge the junk with its high stern, the mast lashed alongside, down the swift running stream. You hear it from the trackers, a more breathless chant, as they pull desperately against the current, half a dozen of them perhaps if they are taking up wupan1, a couple of hundred if they are hauling a splendid junk, its square sail set, over a rapid.

  11. Organic Acid Concentrations in Rivers Within the Amazon River Drainage Basin

    Science.gov (United States)

    Skoog, A.

    2007-12-01

    The composition of the dissolved organic matter pool in both fresh and marine waters is largely unknown. Concentrations of low-molecular-weight organic acids (oxalate, citrate, glycolate, formate, acetate, succinate) have been determined in Brasilian (18 rivers sampled) and Peruvian (19 rivers sampled) rivers within the Amazon River drainage basin. Succinate concentrations were below the detection limit in all rivers. The dominant acid varied among the sampled rivers, indicating that organic acid concentrations depend on river basin characteristics. Organic-acid carbon comprised a highly significant, but variable, fraction of total dissolved carbon, with a range of 3-90%, indicating that organic-acid-derived carbon may be an important source of biologically labile carbon within the Amazon River drainage basin.

  12. 78 FR 22423 - Drawbridge Operation Regulations; Taunton River, Fall River and Somerset, MA

    Science.gov (United States)

    2013-04-16

    ... Somerset, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulation. SUMMARY: The... Brightman Street Bridge across the Taunton River, mile 1.8, between Fall River and Somerset,...

  13. Priority River Metrics for Urban Residents of the Santa Cruz River Watershed

    Science.gov (United States)

    Indicator selection is a persistent question in river and stream assessment and management. We employ qualitative research techniques to identify features of rivers and streams important to urban residents recruited from the general public in the Santa Cruz watershed. Interviews ...

  14. Color Infrared Orthorectified Photomosaic Leaf-off for New River Gorge National River Vegetation Mapping Project

    Data.gov (United States)

    National Park Service, Department of the Interior — Orthorectified color infrared ERDAS IMAGINE and MrSID image of New River Gorge National River (final_neri_mosaic.img). Produced from 471 color infrared photos taken...

  15. Charley River and tributaries, Alaska, a wild and scenic river analysis: Preliminary draft

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Charley River, Alaska, and its principal tributaries possess values which qualify it for inclusion in the National Wild and Scenic Rivers System. The Charley...

  16. 1890's Land Cover/Use - Mississippi River Commission Surveys, Open River 2

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — In the late 1880's and early 1900's the Mississippi River Commission (MRC) conducted an extensive high-resolution survey of the Mississippi River from Cairo,...

  17. Unalakleet Wild River, Alaska, a wild and scenic river analysis: Preliminary draft

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Unalakleet River and its immediate surroundings possess the qualities necessary for inclusion in the National Wild and Scenic Rivers System. Provisions be made...

  18. Field Plot Points for New River Gorge National River Vegetation Mapping Project

    Data.gov (United States)

    National Park Service, Department of the Interior — This data set contains point features which represent locations of vegetation sampling plots in the New River Gorge National River. Location coordinates for most...

  19. The Upper Mississippi River System—Topobathy

    Science.gov (United States)

    Stone, Jayme M.; Hanson, Jenny L.; Sattler, Stephanie R.

    2017-03-23

    The Upper Mississippi River System (UMRS), the navigable part of the Upper Mississippi and Illinois Rivers, is a diverse ecosystem that contains river channels, tributaries, shallow-water wetlands, backwater lakes, and flood-plain forests. Approximately 10,000 years of geologic and hydrographic history exist within the UMRS. Because it maintains crucial wildlife and fish habitats, the dynamic ecosystems of the Upper Mississippi River Basin and its tributaries are contingent on the adjacent flood plains and water-level fluctuations of the Mississippi River. Separate data for flood-plain elevation (lidar) and riverbed elevation (bathymetry) were collected on the UMRS by the U.S. Army Corps of Engineers’ (USACE) Upper Mississippi River Restoration (UMRR) Program. Using the two elevation datasets, the U.S. Geological Survey (USGS) Upper Midwest Environmental Sciences Center (UMESC) developed a systemic topobathy dataset.

  20. Decline of radionuclides in Columbia River biota

    Energy Technology Data Exchange (ETDEWEB)

    Cushing, C.E.; Watson, D.G.; Scott, A.J.; Gurtisen, J.M.

    1980-03-01

    In January 1971, the last of nine plutonium production reactors using direct discharge of once-through cooling waters into the Columbia River was closed. Sampling was initiated at three stations on the Columbia River to document the decline of the radionuclide body burdens in the biota of the Columbia River ecosystem. The data show that in a river-reservoir complex, the measurable body burden of fission-produced radionuclides decreased to essentially undetectable levels within 18 to 24 mo after cessation of discharge of once-through cooling water into the river. On the basis of data from the free-flowing station, we believe that this decrease would be even more rapid in an unimpounded river.

  1. Climatic change and river ice breakup

    Energy Technology Data Exchange (ETDEWEB)

    Beltaos, S. [Environment Canada, National Water Research Institute, Burlington, ON (Canada); Burrell, B. C. [New Brunswick Dept. of the Environment and Local Government, Sciences and Planning Division, Fredericton, NB (Canada)

    2003-07-01

    An overview of climatic factors and impact relative to river ice engineering and science is presented. An explanation of the fundamentals of climatic change is followed by a review of direct and indirect climatic influences that govern river ice breakup and related trends. Known responses of river ice to climatic change and potential future changes to ice breakup processes are described along with the probable ecological and socio-economic consequences of these changes. Changes in engineering approaches to accommodate the present ice regime and predicted changes in climatic variables that affect river ice processes and reduce the vulnerability of infrastructure and ecosystems to climatic change are examined. Future research on the links between river ice and stream ecology is suggested to identify ecological concerns that may result from changes in river ice regimes induced by climatic change. 60 refs., 3 figs.

  2. The Origin of River Meanders

    Science.gov (United States)

    Sahagian, D. L.; Chatanantavet, P.; Bradley, C.; Friedgen-Veitch, D.; Diplas, P.

    2015-12-01

    Various propositions for the origin of meanders have been suggested in the past, involving local disturbances such as variable bank material, obstructions to flow, and sediment transport. Each of these approaches has required a very special and complex set of circumstances for the onset of meandering. However, meanders have also been observed in other systems such as the gulf stream , window glass , glacial meltwater, channels in submarine fans, the jet stream, water faucets, and many others. What has not been satisfactorily demonstrated is why some rivers (or parts of rivers) should tend to meander in the first place rather than ply a straight course to base level. We suggest that the fundamental cause of the river meander instability is simply a minimization of power (rate of work done), with an onset that occurs when inertial terms exceed body forces (e.g. gravity) acting on the flow, and thus create an adverse pressure gradient directed in the opposite direction of the flow. A simple way to visualize the cause of the instability is that the water "backs up" upon itself, running into a parcel of water downstream that is flowing more slowly than the water upstream. This causes the direction of maximum local water surface slope to be diverted to one side or the other of the regional slope. This can occur when a river encounters the ocean (or a lake, or a break in slope), and can occur in many other situations as well. We analyzed various meandering systems globally, and conducted laboratory experiments under controlled conditions to determine the conditions necessary for the onset of the meander instability. The results indicate that the meander instability does not depend on sediment or erodible banks. The critical threshold for the onset of the meander instability occurs when inertial forces exceed body forces acting on the fluid such that an adverse pressure gradient arises. Better understanding of the meander instability should thus elucidate some of the

  3. Model for the evolution of river networks

    Energy Technology Data Exchange (ETDEWEB)

    Leheny, R.L.; Nagel, S.R. (The James Franck Institute and the Department of Physics, The University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 (United States))

    1993-08-30

    We have developed a model, which includes the effects of erosion both from precipitation and from avalanching of soil on steep slopes, to simulate the formation and evolution of river networks. The avalanches provide a mechanism for competition in growth between neighboring river basins. The changing morphology follows many of the characteristics of evolution set forth by Glock. We find that during evolution the model maintains the statistical characteristics measured in natural river systems.

  4. Ecological management of urban rivers in China

    Science.gov (United States)

    Zhang, Junhong; Hou, Xin; Xu, Yiping

    2017-03-01

    At present, China's urban river is widespread with serious pollution, poor water quality, poor water mobility and other issues. In this article, we analyzed the root causes of urban river water environment problems systematically, then puts forward the ways to solve the problems, which including implement the "river length system", strengthen the control of pollution sources, persist in ecological concepts, establish long-term mechanism and strengthen publicity and education.

  5. Sediment load reduction in Chinese rivers

    Institute of Scientific and Technical Information of China (English)

    Cheng LIU; Jueyi SUI; Zhao-Yin WANG

    2008-01-01

    In this Paper,the changes in the annual runoff and sediment transport have been assessed by using the long term observation data from 10 gauging stations on 10 large rivers across China from far north to far south.It is found that the annual sediment yield has generally had a decreasing trend in the past half century.According to the changes in annual runoff and the sediment yield per area.rivers in China can be classified into the following three groups:1)rivers with decreasing annual sediment transport and stable runoff:2)rivers with both decreasing annual sediment transport and runoff and 3)rivers with greatly reduced annual sediment transport and decreasing annual runoff.The results indicate that,in all southern rivers(to the south of the Huaihe River including the Huaihe River),there has been little change in average annual runoff but a dramatic decrease in annual sediment transport.In the northern rivers.however,both the annual sediment yield and the runoff show significant evidence of reduction.To further investigate the recent changes in annual runoff and sediment transport.the short-term observation data from these 10 gauging stations in the recent 10 years have been assessed.Results show that both the annual sediment transport and the runoff have decreased significantly in the northern rivers in the past 10 years.Using the Yellow River at the Lijin Station as an example,the average annual runoff for the last 10 years is only 1/3 of the long term average value and the average annual sediment yield of the last 10 years is only 1/4 of the long term average value.More unusually,in the Yongding River the annual sediment yield has approached zero and the runoff has decreased significantly.In addition,the impacts of human activities on the changes in both runoff and sediment transport have been discussed.

  6. 78 FR 21839 - Drawbridge Operation Regulation; Green River, Small-house, KY and Black River, Jonesboro, LA

    Science.gov (United States)

    2013-04-12

    ... River, mile 79.6, Small- house, KY and Black River, mile 41.0, Jonesboro, LA. The Green River bridge was... SECURITY Coast Guard 33 CFR Part 117 RIN 1625-AA09 Drawbridge Operation Regulation; Green River, Small-house, KY and Black River, Jonesboro, LA AGENCY: Coast Guard, DHS. ACTION: Final rule. SUMMARY:...

  7. 77 FR 52711 - Sabine River Authority of Texas and Sabine River Authority, State of Louisiana; Notice of...

    Science.gov (United States)

    2012-08-30

    ... Energy Regulatory Commission Sabine River Authority of Texas and Sabine River Authority, State of... filed: September 30, 2011 (application); August 1, 2012 (offer of settlement). d. Applicant: Sabine River Authority of Texas and Sabine River Authority, State of Louisiana (Sabine River Authorities)....

  8. Technical Note: Automatic river network generation for a physically-based river catchment model

    OpenAIRE

    2010-01-01

    SHETRAN is a physically-based distributed modelling system that gives detailed simulations in time and space of water flow and sediment and solute transport in river catchments. Standard algorithms for the automatic generation of river channel networks from digital elevation data are impossible to apply in SHETRAN and other similar models because the river channels are assumed to run along the edges of grid cells. In this work a new algorithm for the automatic generation of a river cha...

  9. Technical Note: Automatic river network generation for a physically-based river catchment model

    OpenAIRE

    2010-01-01

    SHETRAN is a physically-based distributed modelling system that gives detailed simulations in time and space of water flow and sediment and solute transport in river catchments. Standard algorithms for the automatic generation of river channel networks from digital elevation data are impossible to apply in SHETRAN and other similar models because the river channels are assumed to run along the edges of grid cells. In this work a new algorithm for the automatic generation of a river channel ne...

  10. New River Dam Foundation Report. Gila River Basin: Phoenix, Arizona and Vicinity (Including New River).

    Science.gov (United States)

    1985-10-01

    further downstream before merging with the Agua Fria River. 6 Site Geology 2.08 The geological formations present within the project area consist...and appear to be of plutonic origin. The granite is characterized by its medium- to coarse- grained texture, small percentage of mafic minerals and...mottled appearance due to a high percentage of mafic minerals , and medium to whitish-gray color. Scattered occurrences of a fine- to medium-grained

  11. Savannah River Laboratory monthly report, October 1991

    Energy Technology Data Exchange (ETDEWEB)

    Ferrell, J.M. (comp.)

    1991-01-01

    This document details monthly activities at the Savannah River Laboratory. Topics addressed are reactor operation, tritium facilities and production; separations operations; environmental concerns; and waste management. (FI)

  12. Savannah River Laboratory monthly report, October 1991

    Energy Technology Data Exchange (ETDEWEB)

    Ferrell, J.M. [comp.

    1991-12-31

    This document details monthly activities at the Savannah River Laboratory. Topics addressed are reactor operation, tritium facilities and production; separations operations; environmental concerns; and waste management. (FI)

  13. VT River Restoration Data in Lamoille County

    Data.gov (United States)

    Vermont Center for Geographic Information — (Link to Metadata) Documented river and riparian buffer restoration projects in Lamoille County, Vermont. Restoration includes buffer plantings (trees and shrubs),...

  14. The Columbia River System Inside Story

    Energy Technology Data Exchange (ETDEWEB)

    None

    2001-04-01

    The Columbia River is one of the greatest natural resources in the western United States. The river and its tributaries touch the lives of nearly every resident of the Pacific Northwest—from fostering world-famous Pacific salmon to supplying clean natural fuel for 50 to 65 percent of the region’s electrical generation. Since early in the 20th century, public and private agencies have labored to capture the benefits of this dynamic river. Today, dozens of major water resource projects throughout the region are fed by the waters of the Columbia Basin river system.

  15. Savannah River Laboratory monthly report, September 1991

    Energy Technology Data Exchange (ETDEWEB)

    Ferrell, J.M. (comp.)

    1991-01-01

    This document details monthly activities at the Savannah River Laboratory. Topics addressed are reactor operation, tritium facilities and production; separation operations; environmental concerns; and waste management. (FI)

  16. Savannah River Laboratory monthly report, September 1991

    Energy Technology Data Exchange (ETDEWEB)

    Ferrell, J.M. [comp.

    1991-12-31

    This document details monthly activities at the Savannah River Laboratory. Topics addressed are reactor operation, tritium facilities and production; separation operations; environmental concerns; and waste management. (FI)

  17. Savannah River Laboratory monthly report, November 1991

    Energy Technology Data Exchange (ETDEWEB)

    Ferrell, J.M. [comp.

    1991-12-31

    This document details monthly activities at the Savannah River Laboratory. Topics addressed are reactor operation; tritium facilities and production; separation operations; environmental concerns; and waste management. (FI)

  18. Savannah River Laboratory monthly report, November 1991

    Energy Technology Data Exchange (ETDEWEB)

    Ferrell, J.M. (comp.)

    1991-01-01

    This document details monthly activities at the Savannah River Laboratory. Topics addressed are reactor operation; tritium facilities and production; separation operations; environmental concerns; and waste management. (FI)

  19. Geomorphology of the lower Copper River, Alaska

    Science.gov (United States)

    Brabets, Timothy P.

    1997-01-01

    The Copper River, located in southcentral Alaska, drains an area of more than 24,000 square miles. About 30 miles above its mouth, this large river enters Miles Lake, a proglacial lake formed by the retreat of Miles Glacier. Downstream from the outlet of Miles Lake, the Copper River flows past the face of Childs Glacier before it enters a large, broad, alluvial flood plain. The Copper River Highway traverses this flood plain and in 1995, 11 bridges were located along this section of the highway. These bridges cross parts of the Copper River and in recent years, some of these bridges have sustained serious damage due to the changing course of the Copper River. Although the annual mean discharge of the lower Copper River is 57,400 cubic feet per second, most of the flow occurs during the summer months from snowmelt, rainfall, and glacial melt. Approximately every six years, an outburst flood from Van Cleve Lake, a glacier-dammed lake formed by Miles Glacier, releases approximately 1 million acre-feet of water into the Copper River. When the outflow rate from Van Cleve Lake reaches it peak, the flow of the Copper River will increase between 150,000 to 190,000 cubic feet per second. Data collected by bedload sampling and continuous seismic reflection indicated that Miles Lake traps virtually all the bedload being transported by the Copper River as it enters the lake from the north. The reservoir-like effect of Miles Lake results in the armoring of the channel of the Copper River downstream from Miles Lake, past Childs Glacier, until it reaches the alluvial flood plain. At this point, bedload transport begins again. The lower Copper River transports 69 million tons per year of suspended sediment, approximately the same quantity as the Yukon River, which drains an area of more than 300,000 square miles. By correlating concurrent flows from a long-term streamflow-gaging station on the Copper River with a short-term streamflow-gaging station at the outlet of Miles Lake

  20. 76 FR 24914 - Digital River Education Services, Inc., a Division of Digital River, Inc., Including Workers...

    Science.gov (United States)

    2011-05-03

    ... Employment and Training Administration Digital River Education Services, Inc., a Division of Digital River... Marketing (JEM), Including On-Site Lease Workers From Serenity Staffing, Accountemps, Silicon Valley, and... Assistance on January 28, 2011, applicable to workers of Digital River Education Services, Inc., a...

  1. Methodology for estimation of river discharge and applicationof the Zhujiang River Estuary (ZRE)

    Institute of Scientific and Technical Information of China (English)

    CHENJay-Chung; WONGLai-Ah

    2004-01-01

    The ZRE is a very complicated estuary with multi-river inlets. The total sum of river discharge in the upstream(away from the tidal influence region) of the Zhujiang River can be easily measured. However, when the total river discharges into the estuary from eight inlets, it is a very difficult task to obtain a continuous river discharge flux data from each branch of the Zhujiang River. However, the different ratios of river discharges between the river branches can significantly affect the estuarine circulation feature and baroclinic process. Moreover, the accuracy of numerical forecast for the estuarine circulation is very much dependent on the accuracy of the time history of the river discharge flux for each branch. Therefore, it is important to estimate river discharge from each branch in order to improve the accuracy of the model forecast for the circulation of the ZRE. The development of a new estimation method of the river discharges is focused on based on the system identification theory, numerical modeling and the time history data from the CODAR observed sea surface current. The new approach has been appfied to estimating the time history (hourly) of river discharge from each branch in the upstream of the ZRE.

  2. Reflections on Development Strategy of Pearl River Delta: In Comparison with Yangtze River Delta

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    <正>1. A comparison between Pearl River Delta and Yangtze River Delta 1.1 Basic conditions 1.1.1 Location, area and scope Located in the southeast of Guangdong Province, the Pearl River Delta (PRD) as an economic zone is a compound delta

  3. Bathymetric surveys of the Neosho River, Spring River, and Elk River, northeastern Oklahoma and southwestern Missouri, 2016–17

    Science.gov (United States)

    Hunter, Shelby L.; Ashworth, Chad E.; Smith, S. Jerrod

    2017-09-26

    In February 2017, the Grand River Dam Authority filed to relicense the Pensacola Hydroelectric Project with the Federal Energy Regulatory Commission. The predominant feature of the Pensacola Hydroelectric Project is Pensacola Dam, which impounds Grand Lake O’ the Cherokees (locally called Grand Lake) in northeastern Oklahoma. Identification of information gaps and assessment of project effects on stakeholders are central aspects of the Federal Energy Regulatory Commission relicensing process. Some upstream stakeholders have expressed concerns about the dynamics of sedimentation and flood flows in the transition zone between major rivers and Grand Lake O’ the Cherokees. To relicense the Pensacola Hydroelectric Project with the Federal Energy Regulatory Commission, the hydraulic models for these rivers require high-resolution bathymetric data along the river channels. In support of the Federal Energy Regulatory Commission relicensing process, the U.S. Geological Survey, in cooperation with the Grand River Dam Authority, performed bathymetric surveys of (1) the Neosho River from the Oklahoma border to the U.S. Highway 60 bridge at Twin Bridges State Park, (2) the Spring River from the Oklahoma border to the U.S. Highway 60 bridge at Twin Bridges State Park, and (3) the Elk River from Noel, Missouri, to the Oklahoma State Highway 10 bridge near Grove, Oklahoma. The Neosho River and Spring River bathymetric surveys were performed from October 26 to December 14, 2016; the Elk River bathymetric survey was performed from February 27 to March 21, 2017. Only areas inundated during those periods were surveyed.The bathymetric surveys covered a total distance of about 76 river miles and a total area of about 5 square miles. Greater than 1.4 million bathymetric-survey data points were used in the computation and interpolation of bathymetric-survey digital elevation models and derived contours at 1-foot (ft) intervals. The minimum bathymetric-survey elevation of the Neosho

  4. Challenges of river basin management: Current status of, and prospects for, the River Danube from a river engineering perspective.

    Science.gov (United States)

    Habersack, Helmut; Hein, Thomas; Stanica, Adrian; Liska, Igor; Mair, Raimund; Jäger, Elisabeth; Hauer, Christoph; Bradley, Chris

    2016-02-01

    In the Danube River Basin multiple pressures affect the river system as a consequence of river engineering works, altering both the river hydrodynamics and morphodynamics. The main objective of this paper is to identify the effects of hydropower development, flood protection and engineering works for navigation on the Danube and to examine specific impacts of these developments on sediment transport and river morphology. Whereas impoundments are characterised by deposition and an excess of sediment with remobilisation of fine sediments during severe floods, the remaining five free flowing sections of the Danube are experiencing river bed erosion of the order of several centimetres per year. Besides the effect of interruption of the sediment continuum, river bed degradation is caused by an increase in the sediment transport capacity following an increase in slope, a reduction of river bed width due to canalisation, prohibition of bank erosion by riprap or regressive erosion following base level lowering by flood protection measures and sediment dredging. As a consequence, the groundwater table is lowered, side-arms are disconnected, instream structures are lost and habitat quality deteriorates affecting the ecological status of valuable floodplains. The lack of sediments, together with cutting off meanders, leads also to erosion of the bed of main arms in the Danube Delta and coastal erosion. This paper details the causes and effects of river engineering measures and hydromorphological changes for the Danube. It highlights the importance of adopting a basin-wide holistic approach to river management and demonstrates that past management in the basin has been characterised by a lack of integration. To-date insufficient attention has been paid to the wide-ranging impacts of river engineering works throughout the basin: from the basin headwaters to the Danube Delta, on the Black Sea coast. This highlights the importance of new initiatives that seek to advance knowledge

  5. Consequence Analyses Following Potential Savannah River Site Hydrological Releases

    Energy Technology Data Exchange (ETDEWEB)

    Blanchard, A.

    1999-07-28

    Postulated accidental release of radiological material to surface water bodies on the Savannah River Site and the resulting downstream contamination of the Savannah River pose a potential threat to downstream river users.

  6. Large River Monitoring Forum Fish Assemblage Database 2016

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Large River Monitoring Forum compiled fish assemblage data for five large rivers in the U.S. as a part of a coordinated effort to compare and contract river...

  7. Runoff modeling of the Mara River using Satellite Observed Soil ...

    African Journals Online (AJOL)

    with European Remote Sensing (ERS) Scatterometer in modeling runoff of the Zambezi river basin. ... (2008) using Geospatial Stream Flow ... obtained for Mara River at Mara mines, Nyangores at Bomet and Amala at Mulot river gauging ...

  8. The Ecological Reserve: Towards a common understanding for river ...

    African Journals Online (AJOL)

    ... Towards a common understanding for river management in South Africa. ... functions is directly aligned with options for human use arising from rivers to deliver ... of water and associated resources located within the macro channels of rivers, ...

  9. Inputs from Indian rivers to the ocean: A synthesis

    Digital Repository Service at National Institute of Oceanography (India)

    DileepKumar, M.; George, M.D.; SenGupta, R.

    ). Fluxes of chemical substances to the Indian Ocean from these rivers are computed to a first approximation. The major ion contents are inversely proportional to the river runoff especially for the rivers entering the Arabian Sea. On an average Indian...

  10. Nitrogen and phosphorus in the Upper Mississippi River: Transport, processing, and effects on the river ecosystem

    Science.gov (United States)

    Houser, J.N.; Richardson, W.B.

    2010-01-01

    Existing research on nutrients (nitrogen and phosphorus) in the Upper Mississippi River (UMR) can be organized into the following categories: (1) Long-term changes in nutrient concentrations and export, and their causes; (2) Nutrient cycling within the river; (3) Spatial and temporal patterns of river nutrient concentrations; (4) Effects of elevated nutrient concentrations on the river; and (5) Actions to reduce river nutrient concentrations and flux. Nutrient concentration and flux in the Mississippi River have increased substantially over the last century because of changes in land use, climate, hydrology, and river management and engineering. As in other large floodplain rivers, rates of processes that cycle nitrogen and phosphorus in the UMR exhibit pronounced spatial and temporal heterogeneity because of the complex morphology of the river. This spatial variability in nutrient processing creates clear spatial patterns in nutrient concentrations. For example, nitrate concentrations generally are much lower in off-channel areas than in the main channel. The specifics of in-river nutrient cycling and the effects of high rates of nutrient input on UMR have been less studied than the factors affecting nutrient input to the river and transport to the Gulf of Mexico, and important questions concerning nutrient cycling in the UMR remain. Eutrophication and resulting changes in river productivity have only recently been investigated the UMR. These recent studies indicate that the high nutrient concentrations in the river may affect community composition of aquatic vegetation (e. g., the abundance of filamentous algae and duckweeds), dissolved oxygen concentrations in off-channel areas, and the abundance of cyanobacteria. Actions to reduce nutrient input to the river include changes in land-use practices, wetland restoration, and hydrological modifications to the river. Evidence suggests that most of the above methods can contribute to reducing nutrient concentration in

  11. Coastal river plumes: Collisions and coalescence

    Science.gov (United States)

    Warrick, Jonathan A.; Farnsworth, Katherine L.

    2017-02-01

    Plumes of buoyant river water spread in the ocean from river mouths, and these plumes influence water quality, sediment dispersal, primary productivity, and circulation along the world's coasts. Most investigations of river plumes have focused on large rivers in a coastal region, for which the physical spreading of the plume is assumed to be independent from the influence of other buoyant plumes. Here we provide new understanding of the spreading patterns of multiple plumes interacting along simplified coastal settings by investigating: (i) the relative likelihood of plume-to-plume interactions at different settings using geophysical scaling, (ii) the diversity of plume frontal collision types and the effects of these collisions on spreading patterns of plume waters using a two-dimensional hydrodynamic model, and (iii) the fundamental differences in plume spreading patterns between coasts with single and multiple rivers using a three-dimensional hydrodynamic model. Geophysical scaling suggests that coastal margins with numerous small rivers (watershed areas 100,000 km2). When two plume fronts meet, several types of collision attributes were found, including refection, subduction and occlusion. We found that the relative differences in pre-collision plume densities and thicknesses strongly influenced the resulting collision types. The three-dimensional spreading of buoyant plumes was found to be influenced by the presence of additional rivers for all modeled scenarios, including those with and without Coriolis and wind. Combined, these results suggest that plume-to-plume interactions are common phenomena for coastal regions offshore of the world's smaller rivers and for coastal settings with multiple river mouths in close proximity, and that the spreading and fate of river waters in these settings will be strongly influenced by these interactions. We conclude that new investigations are needed to characterize how plumes interact offshore of river mouths to better

  12. Environmental Ethics in River Water Management

    Directory of Open Access Journals (Sweden)

    Ravichandran Moorthy

    2011-01-01

    Full Text Available Problem statement: Environmental ethics concerns human beings’ ethical relationship with the natural environment. The fundamental question regarding environmental ethics is basically-what moral obligations do we have concerning the natural environment? The main objective of this study is to examine the extent environmental ethics manifest in river management. The study employs the case study of Malaysia's Gombak River-one of the most polluted urban rivers that run through some heavily inhabited urban areas. The study examines how the Department of Environment (DOE, Drainage and Irrigation Department (DID and Selayang Municipal Council (MPS manage the problem of pollution in the Gombak River. Approach: This study uses both quantitative and qualitative analysis. A quantitative approach is employed to assess the water quality in several points along Gombak River. This is done by way of series of scientific testing to determine the level of pollution in the river. Secondly, a qualitative approach is applied on the data gathered through expert interviews on inter-agency coordination efforts to manage pollution problems. Results: The study firstly shows that the Gombak River is considerably polluted, with higher levels of pollution in upstream as compared to the downstream. The second finding suggests that notwithstanding several legislations that are already in place, there is sluggishness in the enforcement of pollution mitigation efforts as a result of ineffective inter-agency communication and coordination. Conclusion: The lack of concerted and coordinated efforts between river management agencies have been cited as one of the main factors contributing to river pollution. Therefore, the agencies concerned should embark on cohesive measures to ensure the rivers are managed well and its water quality controlled. This requires for a structured coordination mechanism between agencies to be put in place and such mechanism can be emulated in the

  13. Coastal river plumes: Collisions and coalescence

    Science.gov (United States)

    Warrick, Jonathan; Farnsworth, Katherine L

    2017-01-01

    Plumes of buoyant river water spread in the ocean from river mouths, and these plumes influence water quality, sediment dispersal, primary productivity, and circulation along the world’s coasts. Most investigations of river plumes have focused on large rivers in a coastal region, for which the physical spreading of the plume is assumed to be independent from the influence of other buoyant plumes. Here we provide new understanding of the spreading patterns of multiple plumes interacting along simplified coastal settings by investigating: (i) the relative likelihood of plume-to-plume interactions at different settings using geophysical scaling, (ii) the diversity of plume frontal collision types and the effects of these collisions on spreading patterns of plume waters using a two-dimensional hydrodynamic model, and (iii) the fundamental differences in plume spreading patterns between coasts with single and multiple rivers using a three-dimensional hydrodynamic model. Geophysical scaling suggests that coastal margins with numerous small rivers (watershed areas  100,000 km2). When two plume fronts meet, several types of collision attributes were found, including refection, subduction and occlusion. We found that the relative differences in pre-collision plume densities and thicknesses strongly influenced the resulting collision types. The three-dimensional spreading of buoyant plumes was found to be influenced by the presence of additional rivers for all modeled scenarios, including those with and without Coriolis and wind. Combined, these results suggest that plume-to-plume interactions are common phenomena for coastal regions offshore of the world’s smaller rivers and for coastal settings with multiple river mouths in close proximity, and that the spreading and fate of river waters in these settings will be strongly influenced by these interactions. We conclude that new investigations are needed to characterize how plumes interact offshore of river mouths to

  14. Elk River Watershed - Flood Study

    Science.gov (United States)

    Barnes, C. C.; Byrne, J. M.; MacDonald, R. J.; Lewis, D.

    2014-12-01

    Flooding has the potential to cause significant impacts to economic activities as well as to disrupt or displace populations. Changing climate regimes such as extreme precipitation events increase flood vulnerability and put additional stresses on infrastructure. Potential flooding from just under 100 (2009 NPRI Reviewed Facility Data Release, Environment Canada) toxic tailings ponds located in Canada increase risk to human safety and the environment. One such geotechnical failure spilt billions of litres of toxic tailings into the Fraser River watershed, British Columbia, when a tailings pond dam breach occurred in August 2014. Damaged and washed out roadways cut access to essential services as seen by the extensive floods that occurred in Saskatchewan and Manitoba in July 2014, and in Southern Alberta in 2013. Recovery efforts from events such as these can be lengthy, and have substantial social and economic impacts both in loss of revenue and cost of repair. The objective of this study is to investigate existing conditions in the Elk River watershed and model potential future hydrological changes that can increase flood risk hazards. By analyzing existing hydrology, meteorology, land cover, land use, economic, and settlement patterns a baseline is established for existing conditions in the Elk River watershed. Coupling the Generate Earth Systems Science (GENESYS) high-resolution spatial hydrometeorological model with flood hazard analysis methodology, high-resolution flood vulnerability base line maps are created using historical climate conditions. Further work in 2015 will examine possible impacts for a range of climate change and land use change scenarios to define changes to future flood risk and vulnerability.

  15. River geomorphology and fish barriers affect on spatial and temporal patterns of fish assemblages in the Niobrara River, Nebraska

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Niobrara River in northern Nebraska traverses the heart of the Great Plains with portions of the river protected under the National Wild and Scenic River system...

  16. Crystallaria cincotta, a new species of darter (Teleostei: Percidae) from the Elk River of the Ohio River drainage, West Virginia

    Science.gov (United States)

    Welsh, S.A.; Wood, R.M.

    2008-01-01

    A new species of percid, Crystallaria cincotta, is described from the Cumberland, Elk, Green, and Muskingum river drainages of the Ohio River basin, USA. It differs from populations of Crystallaria asprella of the Gulf Coast, lower Mississippi River, middle Mississippi River, upper Mississippi River, and Wabash River drainages by having a reduced number of cheek scale rows restricted to the post-orbital region, a falcate margin on the pelvic fins, a preorbital blotch distinctly separate from the anterior orbital rim, and a wide mouth gape. The Elk River population is also divergent genetically from populations of the Gulf Coast, lower Mississippi River, and upper Mississippi River drainages. Crystallaria cincotta, discovered in the Elk River of the Ohio River drainage in 1980, is a rare species with the only extant population represented by 12 individuals collected from 1980-2005 from the lower 36 km section of the Elk River, West Virginia. Copyright ?? 2008 Magnolia Press.

  17. The dams of the Columbia river; Staustufen des Columbia River

    Energy Technology Data Exchange (ETDEWEB)

    Trueb, L.F.

    1996-12-01

    The Columbia river and its tributaries in the north-western part of the USA form one of the largest river systems of the world. Its development was started during the economic crisis of the thirties with the construction of the Bonneville, Rock Island, and Grand Coulee dams. Another eight dams were realized between the fifties and the beginning of the seventies. As a terraced lake system the Columbia yields more than 90 terawatt hours of electric power annually and provides irrigation to 200 000 hectares of cultivated land. (orig.) [Deutsch] Der Columbia und seine Nebenfluesse im Nordwesten der USA bilden eines der groessten Flusssysteme der Welt. Seine Erschliessung begann waehrend der Wirtschaftskrise der dreissiger Jahre mit dem Bau der Talsperren Bonneville, Rock Island und Grand Coulee. Weitere acht Staustufen wurden von den fuenfziger Jahren bis Anfang der siebziger Jahre verwirklicht. Als Treppe von Seen liefert der Columbia jaehlich ueber 90 TWh elektrische Energie und ermoeglicht die Bewaesserung von 200 000 Hektar Kulturland. (orig.)

  18. River monitoring from satellite radar altimetry in the Zambezi River basin

    DEFF Research Database (Denmark)

    Michailovsky, Claire Irene B.; McEnnis, S.; Berry, P. A. M.;

    2012-01-01

    Satellite radar altimetry can be used to monitor surface water levels from space. While current and past altimetry missions were designed to study oceans, retracking the waveforms returned over land allows data to be retrieved for smaller water bodies or narrow rivers. The objective of this study...... is the assessment of the potential for river monitoring from radar altimetry in terms of water level and discharge in the Zambezi River basin. Retracked Envisat altimetry data were extracted over the Zambezi River basin using a detailed river mask based on Landsat imagery. This allowed for stage measurements...

  19. River water quality modelling: II

    DEFF Research Database (Denmark)

    Shanahan, P.; Henze, Mogens; Koncsos, L.

    1998-01-01

    The U.S. EPA QUAL2E model is currently the standard for river water quality modelling. While QUAL2E is adequate for the regulatory situation for which it was developed (the U.S. wasteload allocation process), there is a need for a more comprehensive framework for research and teaching. Moreover......, and to achieve robust model calibration. Mass balance problems arise from failure to account for mass in the sediment as well as in the water column and due to the fundamental imprecision of BOD as a state variable. (C) 1998 IAWQ Published by Elsevier Science Ltd. All rights reserved....

  20. Inundation risk for embanked rivers

    Directory of Open Access Journals (Sweden)

    W. G. Strupczewski

    2013-08-01

    Full Text Available The Flood Frequency Analysis (FFA concentrates on probability distribution of peak flows of flood hydrographs. However, examination of floods that haunted and devastated the large parts of Poland lead us to revision of the views on the assessment of flood risk of Polish rivers. It turned out that flooding is caused not only by the overflow of the levee crest but also due to the prolonged exposure to high water on levees structure causing dangerous leaks and breaches that threaten their total destruction. This is because the levees are weakened by long-lasting water pressure and as a matter of fact their damage usually occurs after the culmination has passed the affected location. The probability of inundation is the total of probabilities of exceeding embankment crest by flood peak and the probability of washout of levees. Therefore, in addition to the maximum flow one should also consider the duration of high waters in a river channel. In the paper the new two-component model of flood dynamics: "Duration of high waters–Discharge Threshold–Probability of non-exceedance" (DqF, with the methodology of its parameter estimation was proposed as a completion to the classical FFA methods. Such a model can estimate the duration of stages (flows of an assumed magnitude with a given probability of exceedance. The model combined with the technical evaluation of the probability of levee breaches due to the duration (d of flow above alarm stage gives the annual probability of inundation caused by the embankment breaking. The results of theoretical investigation were illustrated by a practical example of the model implementation to the series of daily flow of the Vistula River at Szczucin. Regardless of promising results, the method of risk assessment due to prolonged exposure of levees to high water is still in its infancy despite its great cognitive potential and practical importance. Therefore, we would like to point out the need for and usefulness of

  1. THE FORMING CONDITIONS OF ALLUVIAL RIVER CHANNEL PATTERNS

    Institute of Scientific and Technical Information of China (English)

    Pu QI; Gouting LIANG; Zangying SUN; Honghai QI

    2002-01-01

    In normal fluvial processes the river channel is determined by river flows while the movement of river flows is contained by river channels. The relationship between the river morphology and its bend curvature shows that rivers with large bend curvatures always have narrow and deep channels and those with shallow and wide channels are always straight. The plan form of a river reaches is determined by the cross-sectional morphology. A meandering river reach may be developed under various water-sediment conditions as long as the narrow and deep channels are formed.

  2. Contamination of perfluorinated compounds (PFCs) in Chao Phraya River and Bangpakong River, Thailand.

    Science.gov (United States)

    Kunacheva, Chinagarn; Boontanon, Suwanna Kitpati; Fujii, Shigeo; Tanaka, Shuhei; Musirat, Chanatip; Artsalee, Chattakarn; Wongwattana, Thana

    2009-01-01

    Perfluorinated compounds (PFCs) have been used for many years, and are distributed all over the world. This study focused on occurrences of PFCs, especially perfluorooctane sulfonate (PFOS) and perfluorooctonoic acid (PFOA) in Thai rivers and industrial estate discharges, while comparing results with rivers of other Asian countries (Japan, China, and Malaysia). Surveys were conducted in Chao Phraya River, Bangpakong River and three industrial estates. A solid phase extraction (SPE) and HPLC-ESI-MS/MS were used for the analysis of these chemicals. The average concentrations of PFOS and PFOA were 1.9 and 4.7 ng/L, respectively in Chao Phraya River, while lower concentrations were detected in Bangpakong River with the averages of 0.7 ng/L for both PFOS and PFOA. Higher concentrations were detected in all industrial estate discharges with the averages of 64.3 ng/L for PFOA and 17.9 ng/L for PFOS., Total loadings from three industrial estates were 1.93 g/d for PFOS and 11.81 g/d for PFOA. The concentration levels in Thai rivers were less than rivers in Japan, China, and Malaysia. However, PFCs loading rate of Chao Phraya River was much higher than Yodo River (Japan), due to the higher flow rate. The other six PFCs were found above the Limit of Quantification (LOQ) in most samples. PFHxS and PFNA were also highly detected in some river samples.

  3. Análisis ecocardiográfico del efecto de diferentes inhibidores del intercambiador Na+/H+ sobre la estructura y función sistólica del ventrículo izquierdo en ratas espontáneamente hipertensas Echocardiographic analysis of the effect of different Na+/H+ exchanger inhibitors on left ventricular structure and function in spontaneously hypertensive rats

    Directory of Open Access Journals (Sweden)

    Eduardo M. Escudero

    2006-10-01

    Full Text Available El presente estudio fue proyectado para analizar mediante ecocardiograma los efectos del HOE 642 (cariporide (HOE y del BIIB 723 (BIIB sobre la estructura y función sistólica del ventrículo izquierdo en ratas espontáneamente hipertensas (SHR- 8 con 30 mg/kg/día de HOE, 8 con 30 mg/kg/día de BIIB durante 30 días y 4 sin tratamiento (grupo control durante esos 30 días. Los distintos parámetros analizados no mostraron cambios durante ese período en las ratas controles. Si bien el HOE determinó un leve descenso de la presión arterial (C: 184 ± 1.75 mm Hg; 30d:176.20 ± 2.60 mm Hg, p The aim of this study was to analyze by echocardiogram, the action of two Na+/H+ exchange, inhibitors, HOE 642 (HOE and BIIB 723 (BIIB on left ventricular (LV mass and LV systolic function. We studied 16 spontaneously hypertensive rats (SHR, 8 treated with HOE 30 mg/kg/day, 8 with 30 mg/kg/day of BIIB during 30 days and 4 SHR as controls during those 30 days. Results are expressed as mean values ± SEM. The systolic blood pressure and the echocardiograpic parameters examined did not evidence changes during that period in the controls rats. Even though HOE determined a slight decrease in blood pressure (HOE C: 184 ± 1.75 mm Hg; HOE 30d: 176.20 ± 2.60 mm Hg - p <0.01 which was not detected with BIIB, both drugs provoked an increase of peak systolic stress (HOE C: 166 ± 29 kdynes/cm²; HOE 30d: 204 ± 34 kdynes/cm², p <0.04; BIIB C: 164 ± 25.90 kdynes/cm²; BIIB 30d: 234 ± 29.30 kdynes/cm², p <0.02. HOE and BIIB reduced LV mass after 30 days of administration (HOE C: 612.50 ± 50 mg; 30d: 452 ± 37 mg, p <0.01. BIIB C: 544 ± 16mg; 30d: 374 ± 25 mg, p <0.01. LV endocardial shortening was similar independently of the NHE inhibitors used (HOE C: 62.30 ± 2.75%; 30d: 65.50 ± 2.40%, ns. BIIB C: 63.20 ± 2,39%; 30d 67,20 ± 1.62%, ns. These data demonstrate that long-treatment with HOE or BIIB produced similar LV mass regression without changes in

  4. Sandbar-regulated hydrodynamic influences on river hydrochemistry at Mengabang Telipot River, Peninsular Malaysia.

    Science.gov (United States)

    Koh, Mei Kee; Sathiamurthy, Edlic; Suratman, Suhaimi; Tahir, Norhayati Mohd

    2012-12-01

    Influences of river hydrodynamic behaviours on hydrochemistry (salinity, pH, dissolved oxygen saturations and dissolved phosphorus) were evaluated through high spatial and temporal resolution study of a sandbar-regulated coastal river. River hydrodynamic during sandbar-closed event was characterized by minor dependency on tidal fluctuations, very gradual increase of water level and continual low flow velocity. These hydrodynamic behaviours established a hydrochemistry equilibrium, in which water properties generally were characterized by virtual absence of horizontal gradients while vertical stratifications were significant. In addition, the river was in high trophic status as algae blooms were visible. Conversely, river hydrodynamic in sandbar-opened event was tidal-controlled and showed higher flow velocity. Horizontal gradients of water properties became significant while vertically more homogenised and with lower trophic status. In essence, this study reveals that estuarine sandbar directly regulates river hydrodynamic behaviours which in turn influences river hydrochemistry.

  5. Environmental flow for Monsoon Rivers in India: The Yamuna River as a case study

    CERN Document Server

    Soni, Vikram; Singh, Diwan

    2013-01-01

    We consider the flows of Monsoon Rivers in India that will permit the river to perform all its natural functions. About 80% of the total flow for Indian rivers is during the monsoon and the remaining 20% is during the non monsoon period. By carrying out a case study of the river Yamuna in Delhi we find that at least 50% of the virgin monsoon (July to September) flow is required for the transport of the full spectrum of soil particles in the river sediment. A similar flow is needed for adequate recharge of the floodplain aquifers along river. For the non monsoon period (October to June) about 60% of the virgin flow is necessary to avoid the growth of still water algae and to support river biodiversity.

  6. Straight river: its formation and speciality

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Straight river is generally regarded as one of the typical river patterns in conventional classifications in terms of their channel plain landforms. However, very few straight patterns were found to be distributed in wider spatial and temporal spans in the self-adjusted fluvial rivers. Thus, the questions occur such as that is it possible for a channel takes on a stable straight pattern? What are the main factors controlling the processes of the river pattern formation and transformation from a straight to other patterns? Various theories and hypotheses including geomorphic threshold hypothesis, the extreme hypothesis on energy dissipation rate, the stability theory, etc. have been developed to explain the aforementioned questions, but none of them is sound for the explanation to the straight-river formation. From the modern fluvial plain patterns, the straight patterns are not as stable as other typical patterns which occurred in nature; from the historic records of the river sedimentation, no apparent evidence was found to support the stable straight river evolution. Based on the analysis of existing theories, observations, evolvement processes of the channel patterns in the experimental results, this paper concluded that the straight pattern should not be included as one of the typical patterns that are self-formed and developed. This study is of importance to understanding of the river pattern formation and transformation.

  7. 33 CFR 117.415 - Green River.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Green River. 117.415 Section 117... OPERATION REGULATIONS Specific Requirements Kentucky § 117.415 Green River. (a) The draw of the CSX... vicinity. (b) The draw of the CSX Transportation Railroad bridge, Mile 79.6 at Small-house, is...

  8. Evolution of Modern Yellow River Delta Coast

    Institute of Scientific and Technical Information of China (English)

    尹延鸿; 周永青; 丁东

    2004-01-01

    This paper deals with the development and evolution of modem Yellow River delta and the erosion or deposition rates of its different sections. In June, 1996,Yellow Rivers terminal course was artificially turned eastwards to empty into the sea and then the 11th lobe of the modern Yellow River delta began to form. This course change may mark the beginning of the 3rd subdelta formation. As a result of that, the Yellow River delta advances towards east by north with the 1st, 2nd and 3rd subdeltas arranged in succession. Coast zone in the deltaic area is divided into 7 different sections according to their different erosion or deposition rates: the relatively stable section from Dakou River to Shunjiang Stream, the weakly retreating section from Shun jiang Stream to the Tiaohe River mouth, the strongly retreating section from the Tiaohe River mouth to the station 106, the artificially stable section due to stone dam protection from the station 106 to Gudong Oilfield, the strong deposition section from Gudong Oilfield to Dawenliu Haipu, the weakly deposition section from Dawenliu Haipu to the Zimai Stream mouth, and the stable section from the Zimai Stream mouth to the Jiaolai River mouth. It is predicted that the erosion and deposition situations of the sections will nearly remain the same in 10 years, but the retreating and silting-up rates will tend to become slower gradually. Human activities have an evident influence on the changes of the coastline.

  9. 33 CFR 117.385 - Snake River.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Snake River. 117.385 Section 117.385 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Idaho § 117.385 Snake River. The drawspan of the U.S. 12...

  10. South Fork Holston River basin 1988 biomonitoring

    Energy Technology Data Exchange (ETDEWEB)

    Saylor, C.F.; Ahlstedt, S.A.

    1990-06-01

    There is concern over the effects of shifts in land use use practices on the aquatic fauna of streams in the South Fork Holston River basin in northwestern North Carolina and southwestern Virginia. Trout reproduction has noticeably declined in the Watauga River subbasin. The Watauga River and Elk River subbasins have been subjected to commercial and resort development. The Middle fork Holston River and the upper South Fork Holston River subbasins have been affected by agricultural and mining activities, respectively (Cox, 1986). To aid reclamation and management of the South Fork Holston basin, Tennessee Valley Authority (TVA) biologists conducted biomonitoring--including index of biotic integrity and macroinvertebrate sampling--on the Middle Fork Holston, South Fork Holston, Watauga, and Elk Rivers to assess cumulative impairment related to changes in habitat and pollutant loading in these subbasins. Biomonitoring can detect environmental degradation, help document problem areas, and assist in development of strategies for managing water quality. This report discusses the methods and materials and results of the biomonitoring of South Fork Holston River Basin. 13 refs., 5 figs., 12 tabs.

  11. Savannah River Site Environmental Report for 1998

    Energy Technology Data Exchange (ETDEWEB)

    Arnett, M

    1999-06-09

    The mission at the Savannah River Site (SRS) is focused primarily on support of the national defense, nonproliferation, and environmental cleanup. SRS-through its prime operating contractor, Westinghouse Savannah River Company-continues to maintain a comprehensive environmental monitoring program.

  12. 76 FR 12094 - Whitman River Dam, Inc.

    Science.gov (United States)

    2011-03-04

    ... Federal Energy Regulatory Commission Whitman River Dam, Inc. Notice of Application Tendered for Filing.... Applicant: Whitman River Dam, Inc. e. Name of Project: Crocker Dam Hydro Project. f. Location: On the... analysis at this time. n. The Crocker Dam Hydro Project would consist of: (1) The existing...

  13. 33 CFR 117.263 - Banana River.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Banana River. 117.263 Section 117.263 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Florida § 117.263 Banana River. (a) The draw of the Mathers...

  14. 33 CFR 117.493 - Sabine River.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Sabine River. 117.493 Section 117.493 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Louisiana § 117.493 Sabine River. (a) The draw of the...

  15. 33 CFR 117.981 - Sabine River.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Sabine River. 117.981 Section 117.981 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Texas § 117.981 Sabine River. See § 117.493, Sabine...

  16. SEDIMENT TRANSPORT IN THE YANGTZE RIVER ESTUARY

    Institute of Scientific and Technical Information of China (English)

    SHEN Zhigang

    2001-01-01

    The hydrodynamic and the sediment transport patterns within the estuary of the Yangtze River are complex because of interaction of fluvial and the tidal forces, depending on freshwater discharge and tidal range. Based on the data measured in recent years, this paper discusses the characteristics of flow and sediment movement in the Yangtze River Estuary and their influences on the evolution of the estuary.

  17. 33 CFR 117.547 - Bush River.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Bush River. 117.547 Section 117.547 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.547 Bush River. The draw of the Amtrak bridge...

  18. Irregular dunes, sediment sorting, and river morphodynamics

    NARCIS (Netherlands)

    Blom, Astrid; Weerts, H.J.T.; Ritsema, I.L; van Os, A.G.

    2006-01-01

    This research project focuses on modelling the large-scale morphodynamics of low-slope rivers dominated by mixed sediment, such as the Dutch part of the Rhine River. Usually we simply neglect the effects of sorting and variability in dune dimensions on the large-scale morphodynamics. This paper

  19. Excessive nitrogen and phosphorus in European rivers

    NARCIS (Netherlands)

    Blaas, Harry; Kroeze, Carolien

    2016-01-01

    Rivers export nutrients to coastal waters. Excess nutrient export may result in harmful algal blooms and hypoxia, affecting biodiversity, fisheries, and recreation. The purpose of this study is to quantify for European rivers (1) the extent to which N and P loads exceed levels that minimize the r

  20. 33 CFR 117.755 - Shrewsbury River.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Shrewsbury River. 117.755 Section 117.755 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New Jersey § 117.755 Shrewsbury River. (a) The...

  1. 33 CFR 117.925 - Cooper River.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Cooper River. 117.925 Section 117.925 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements South Carolina § 117.925 Cooper River. The draw of the...

  2. 33 CFR 117.713 - Cooper River.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Cooper River. 117.713 Section 117.713 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New Jersey § 117.713 Cooper River. (a) The drawspans for...

  3. Sulfate-reducing prokaryotes in river floodplains

    NARCIS (Netherlands)

    Miletto, M.

    2007-01-01

    This thesis constitutes a pioneer attempt at elucidating the ecology of sulfate-reducing prokaryotes in river floodplains. These are non-typical sulfate-reducing environmental settings, given the generally low sulfate concentration that characterize freshwater habitats, and river flow regulation

  4. Experimental meandering river with chute cutoffs

    NARCIS (Netherlands)

    Dijk, W.M. van; Lageweg, W.I. van de; Kleinhans, M.G.

    2012-01-01

    Braided rivers are relatively simple to produce in the laboratory, whereas dynamic meandering rivers have not been sustained beyond initial bend formation. Meandering is theoretically explained by bend instability growing from planimetric perturbation, which convects downstream. In this study, we ex

  5. Hillslope-derived blocks retard river incision

    Science.gov (United States)

    Shobe, Charles M.; Tucker, Gregory E.; Anderson, Robert S.

    2016-05-01

    The most common detachment-limited river incision models ignore the effects of sediment on fluvial erosion, yet steep reaches of mountain rivers often host clusters of large (>1 m) blocks. We argue that this distribution of blocks is a manifestation of an autogenic negative feedback in which fast vertical river incision steepens adjacent hillslopes, which deliver blocks to the channel. Blocks inhibit incision by shielding the bed and enhancing form drag. We explore this feedback with a 1-D channel-reach model in which block delivery by hillslopes depends on the river incision rate. Results indicate that incision-dependent block delivery can explain the block distribution in Boulder Creek, Colorado. The proposed negative feedback may significantly slow knickpoint retreat, channel adjustment, and landscape response compared to rates predicted by current theory. The influence of hillslope-derived blocks may complicate efforts to extract base level histories from river profiles.

  6. A Geophysical Study in Grand Teton National Park and Vicinity, Teton County, Wyoming: With Sections on Stratigraphy and Structure and Precambrian Rocks

    Science.gov (United States)

    Behrendt, John Charles; Tibbetts, Benton L.; Bonini, William E.; Lavin, Peter M.; Love, J.D.; Reed, John C.

    1968-01-01

    An integrated geophysical study - comprising gravity, seismic refraction, and aeromagnetic surveys - was made of a 4,600-km2 area in Grand Teton National Park and vicinity, Wyoming, for the purpose of obtaining a better understanding of the structural relationships in the region. The Teton range is largely comprised of Precambrian crystalline rocks and layered metasedimentary gneiss, but it also includes granitic gneiss, hornblende-plagioclase gneiss, granodiorite, and pegmatite and diabase dikes. Elsewhere, the sedimentary section is thick. The presence of each system except Silurian provides a chronological history of most structures. Uplift of the Teton-Gros Ventre area began in the Late Cretaceous; most of the uplift occurred after middle Eocene time. Additional uplift of the Teton Range and downfaulting of Jackson Hole began in the late Pliocene and continues to the present. Bouguer anomalies range from -185 mgal over Precambrian rocks of the Teton Range to -240 mgal over low-density Tertiary and Cretaceous sedimentary rocks of Jackson Hole. The Teton fault (at the west edge of Jackson Hole), as shown by steep gravity gradients and seismic-refraction data, trends north-northeast away from the front of the Teton Range in the area of Jackson Lake. The Teton fault either is shallowly inclined in the Jenny Lake area, or it consists of a series of fault steps in the fault zone; it is approximately vertical in the Arizona Creek area. Seismic-refraction data can be fitted well by a three-layer gravity model with velocities of 2.45 km per sec for the Tertiary and Cretaceous rocks above the Cloverly Formation, 3.9 km per sec for the lower Mesozoic rocks, and 6.1 km per sec for the Paleozoic (limestone and dolomite) and Precambrian rocks. Gravity models computed along two seismic profiles are in good agreement (sigma=+- 2 mgal) if density contrasts with the assumed 2.67 g per cm2 Paleozoic and Precambrian rocks are assumed to be -0.35 and -0.10 g per cm2 for the 2

  7. Trends in the occurrence of human and veterinary antibiotics in the sediments of the Yellow River, Hai River and Liao River in northern China

    Energy Technology Data Exchange (ETDEWEB)

    Zhou Lijun [State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 (China); Ying Guangguo, E-mail: guang-guo.ying@gig.ac.cn [State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 (China); Zhao Jianliang [State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 (China); Yang Jifeng [State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 (China); Chemistry and Chemical Engineering Department, Hunan University of Arts and Science, Changde 415000 (China); Wang Li; Yang Bin; Liu Shan [State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 (China)

    2011-07-15

    The occurrence of four classes of 17 commonly used antibiotics (including fluoroquinolones, tetracycline, sulfonamides, and macrolides) was investigated in the sediments of the Yellow River, Hai River and Liao River in northern China by using rapid resolution liquid chromatography-tandem mass spectrometry. Higher concentrations were detected for most antibiotics in the sediments of the Hai River than in the sediments of the other rivers. Norfloxacin, ofloxacin, ciprofloxacin and oxytetracycline in the three rivers were most frequently detected with concentrations up to 5770, 1290, 653 and 652 ng/g, respectively. High frequencies and concentrations of the detected antibiotics were often found in the downstream of large cities and areas influenced by feedlot and fish ponds. Good fitted linear regression equations between antibiotic concentration and sediment physicochemical properties (TOC, texture and pH) were also found, indicating that sediment properties are important factors influencing the distribution of antibiotics in the sediment of rivers. - Highlights: > Presence of four classes of commonly used antibiotics in the river sediments. > Higher concentrations in the Hai River than in the Liao River and Yellow River. > Norfloxacin, ofloxacin, ciprofloxacin and oxytetracycline most frequently detected. > High antibiotic concentrations often found in the downstream of large cities. > River sediments are an important reservoir of antibiotics. - Higher concentrations of selected antibiotics were determined in the sediments of the Hai River than in the Liao River and Yellow River.

  8. How integrated is river basin management?

    Science.gov (United States)

    Downs, Peter W.; Gregory, Kenneth J.; Brookes, Andrew

    1991-05-01

    Land and water management is increasingly focused upon the drainage basin. Thirty-six terms recently used for schemes of “integrated basin management” include reference to the subject or area and to the aims of integrated river basin management, often without allusion to the multiobjective nature. Diversity in usage of terms has occurred because of the involvement of different disciplines, of the increasing coherence of the drainage basin approach, and the problems posed in particular parts of the world. The components included in 21 different approaches are analyzed, and, in addition to showing that components related broadly to water supply, river channel, land, and leisure aspects, it is concluded that there are essentially five interrelated facets of integrated basin management that involved water, channel, land, ecology, and human activity. Two aspects not fully included in many previous schemes concern river channel changes and the dynamic integrity of the fluvial system. To clarify the terminology used, it is suggested that the term comprehensive river basin management should be used where a wide range of components is involved, whereas integrated basin management can signify the interactions of components and the dominance of certain components in the particular area. Holistic river basin management is advocated as a term representing an approach that is both fully comprehensive and integrated but also embraces the energetics of the river system and consideration of changes of river channels and of human impacts throughout the river system. The paradigm of working with the river can be extended to one of working with the river in the holistic basin context.

  9. Sediment transport in two mediterranean regulated rivers.

    Science.gov (United States)

    Lobera, G; Batalla, R J; Vericat, D; López-Tarazón, J A; Tena, A

    2016-01-01

    Mediterranean climate is characterized by highly irregular rainfall patterns with marked differences between wet and dry seasons which lead to highly variable hydrological fluvial regimes. As a result, and in order to ensure water availability and reduce its temporal variability, a high number of large dams were built during the 20th century (more than 3500 located in Mediterranean rivers). Dams modify the flow regime but also interrupt the continuity of sediment transfer along the river network, thereby changing its functioning as an ecosystem. Within this context, the present paper aims to assess the suspended sediment loads and dynamics of two climatically contrasting Mediterranean regulated rivers (i.e. the Ésera and Siurana) during a 2-yr period. Key findings indicate that floods were responsible for 92% of the total suspended sediment load in the River Siurana, while this percentage falls to 70% for the Ésera, indicating the importance of baseflows on sediment transport in this river. This fact is related to the high sediment availability, with the Ésera acting as a non-supply-limited catchment due to the high productivity of the sources (i.e. badlands). In contrast, the Siurana can be considered a supply-limited system due to its low geomorphic activity and reduced sediment availability, with suspended sediment concentration remaining low even for high magnitude flood events. Reservoirs in both rivers reduce sediment load up to 90%, although total runoff is only reduced in the case of the River Ésera. A remarkable fact is the change of the hydrological character of the River Ésera downstream for the dam, shifting from a humid mountainous river regime to a quasi-invariable pattern, whereas the Siurana experiences the opposite effect, changing from a flashy Mediterranean river to a more constant flow regime below the dam.

  10. American shad in the Columbia River

    Science.gov (United States)

    Petersen, J.H.; Hinrichsen, R.A.; Gadomski, D.M.; Feil, D.H.; Rondorf, D.W.

    2003-01-01

    American shad Alosa sapidissima from the Hudson River, New York, were introduced into the Sacramento River, California, in 1871 and were first observed in the Columbia River in 1876. American shad returns to the Columbia River increased greatly between 1960 and 1990, and recently 2-4 million adults have been counted per year at Bonneville Dam, Oregon and Washington State (river kilometer 235). The total return of American shad is likely much higher than this dam count. Returning adults migrate as far as 600 km up the Columbia and Snake rivers, passing as many as eight large hydroelectric dams. Spawning occurs primarily in the lower river and in several large reservoirs. A small sample found returning adults were 2-6 years old and about one-third of adults were repeat spawners. Larval American shad are abundant in plankton and in the nearshore zone. Juvenile American shad occur throughout the water column during night, but school near the bottom or inshore during day. Juveniles consume a variety of zooplankton, but cyclopoid copepods were 86% of the diet by mass. Juveniles emigrate from the river from August through December. Annual exploitation of American shad by commercial and recreational fisheries combined is near 9% of the total count at Bonneville Dam. The success of American shad in the Columbia River is likely related to successful passage at dams, good spawning and rearing habitats, and low exploitation. The role of American shad within the aquatic community is poorly understood. We speculate that juveniles could alter the zooplankton community and may supplement the diet of resident predators. Data, however, are lacking or sparse in some areas, and more information is needed on the role of larval and juvenile American shad in the food web, factors limiting adult returns, ocean distribution of adults, and interactions between American shad and endangered or threatened salmonids throughout the river. ?? 2003 by the American Fisheries Society.

  11. Hotspots within the Transboundary Selenga River Basin

    Science.gov (United States)

    Kasimov, Nikolay; Lychagin, Mikhail; Chalov, Sergey

    2013-04-01

    Gathering the efficient information on water pollution of transboundary river systems remains the crucial task in international water management, environmental pollution control and prevention health problems. Countries, located in the low parts of the river basins, depend on the water strategy and water use in the adjacent countries, located upstream. Surface water pollution is considered to be the most serious problem, facing the above-mentioned countries. Large efforts in terms of field measurement campaigns and (numerical) transport modeling are then typically needed for relevant pollution prediction and prevention. Russian rivers take inflow from 8 neighboring countries. Among them there are 2 developing economies - People Republic of China and Mongolia, which are located in water-scarce areas and thus solve their water-related problems through the consumption of international water. Negative change of water runoff and water quality in the foreign part of transboundary river is appeared inside Russian territory with more or less delay. The transboundary river system of Selenga is particularly challenging, being the biggest tributary of Lake Baikal which is the largest freshwater reservoir in the world. Selenga River contributes about 50 % of the total inflow into Baikal. It originates in the mountainous part of Mongolia and then drains into Russia. There are numerous industries and agricultural activities within the Selenga drainage basin that affect the water quality of the river system. Absence of the single monitoring system and predictive tools for pollutants transport in river system requires large efforts in understanding sources of water pollution and implemented data on the relevant numerical systems for the pollution prediction and prevention. Special investigations in the Selenga river basin (Mongolia and Russia) were done to assess hot spots and understand state-of-the art in sediment load, water chemistry and hydrobiology of transboundary systems

  12. Isotopic Characterization of River Waters and Water Source Identification in an Inland River, Central Asia

    Directory of Open Access Journals (Sweden)

    Yuting Fan

    2016-07-01

    Full Text Available Understanding runoff generation and dynamics is the basis for water resource management, while water isotopic ratios are a potential tool for studying the mechanism on a large scale. In this paper, spatial variations of δ18O and δD of river water and their sources within a large region of the Tarim River were investigated. The results showed obvious spatial variations of both water isotope values along the river flow direction, and significant seasonal variation occurred within the river water isotopes. This indicated that different proportions of rain and melt water entering river water should lead to spatial variation, and for mid-stream and downstream regions, the transformation relationship between surface water and groundwater should consider less input of melt water. Furthermore, we quantitatively determine the ratio of different water sources using the stable isotope mass balance method and other stable tracer elements. Results showed the contribution of ice-snowmelt water varied from 14.97% to 40.85%, that of rain varied from 9.04% to 54.80%, and that of groundwater varied from 15.34% to 58.85%, and they also showed that baseflow is a factor connecting melt water and groundwater, which meant the Hotan River and the Yarkand River are melt water–dependent rivers, and seasonal precipitation is the main water supply source of baseflow in the Aksu River and the Kaidu River.

  13. Ice Jams on the Little Missouri River, North Dakota and North Platte River, Nebraska

    Science.gov (United States)

    Pang, B. P.; Brookman, D. A.

    2004-12-01

    During the winter months, rivers in the north central United States have a phenomenon occurring, which is known as "ice jams". The initial melting of the river ice causes broken ice buildup, which acts as a quasi-dam restricting the natural flow. Ice jams severely impact ecosystems and are known to cause extensive damage to the channels, as well as man-made structures. The focus of this paper is on ice jams on the Little Missouri River in North Dakota and the North Platte River in Nebraska. Previous investigations done on the Lower Platte River valley, as well as the Missouri River basin, have shown that the primary cause of ice jams on these rivers is due to the spring thaw. The initial portion of the paper will discuss the pattern of ice jams on these rivers, as well as some mitigation strategies for control of these ice jams. The second section will deal with the modeling of ice jams on these river systems using HEC-RAS. This model will be comprised of both two and three-dimensional aspects of the rivers.

  14. Multiple Time Scale Analysis of River Runoff Using Wavelet Transform for Dagujia River Basin, Yantai, China

    Institute of Scientific and Technical Information of China (English)

    LIU Delin; LIU Xianzhao; LI Bicheng; ZHAO Shiwei; LI Xiguo

    2009-01-01

    Based on monOdy river runoff and meteorological data, a method of Morlet wavelet transform was used to analyze the multiple time scale characteristics of river runoffin the Dagnjia River Basin, Yantai City, Shandong Province. The results showed that the total annual river runoff in the Dagujia River Basin decreased significantly from 1966 to 2004, and the rate of decrease was 48×106m3/10yr, which was higher than the mean value of most rivers in China. Multiple time scale characteristics existed, which accounted for different aspects of the changes in annual river runoff, and the major periods of the runoff time series were identified as about 28 years, 14 years and 4 years with decreasing levels of fluctuation. The river runoff evolution process was controlled by changes in precipitation to a certain extent, but it was also greatly influenced by human activities. Also, for different time periods and scales, the impacts of climate changes and human activities on annual river runoff evolution occurred at the same time. Changes in the annual river runoffwere mainly associated with climate change before the 1980s and with human activities after 1981.

  15. Operational river ice forecasting on the Peace River : managing flood risk and hydropower production

    Energy Technology Data Exchange (ETDEWEB)

    Jasek, M. [BC Hydro, Burnaby, BC (Canada); Friensenhan, E. [Alberta Environment, Edmonton, AB (Canada); Granson, W. [Alberta Environment, Peace River, AB (Canada)

    2007-07-01

    This paper described the procedures used jointly by Alberta Environment and BC Hydro to manage the water flows on the Peace River. The Alberta-British Columbia Joint Task Force on Peace River Ice (JTF) was concerned with the coordination of break-up ice observations along the river as well as ice jam flooding at the Town of Peace River (TPR), resulting from an induced dynamic break-up on the Smoky River, a main tributary of the Peace River. The TPR is the largest community that can be most affected by ice jams on river. As such, river ice processes on the river are monitored and subject to operational procedures of the JTF. These operating procedures are organized into 3 separate sequential phases, notably freeze-up procedures, mid-winter procedures, and break-up procedures. In April 2007, the ice break-up season on the Peace River and Smoky River, was particularly challenging as record high snow cover led to a dynamic break-up of these two streams. Costs due to reduced hydropower production were documented. This paper highlighted the main decision points for mitigation and presented the recommendations that improve mitigation efforts with benefits to both the flood prone community and the power utility. This paper revealed that forecasting the start of control flow by predicting the arrival of the ice front using the Comprehensive River Ice Simulation System Project (CRISSP) model was largely successful. Further work is underway to define the accuracy of forecasting the start of control flow using CRISSP, as accuracy of temperature forecasts appears to be the major uncertainty. The JTF was able to make successful recommendations for flow reductions. However, the need for an accurate hydrologic model for the Smoky River as well as other inflows between Peace Canyon and the TPR was emphasized. 4 refs., 31 figs.

  16. 76 FR 7837 - Big Rivers Electric Corporation; Notice of Filing

    Science.gov (United States)

    2011-02-11

    ... December 1, 2010, the date that Big Rivers integrated its transmission facilities with the Midwest... Energy Regulatory Commission Big Rivers Electric Corporation; Notice of Filing Take notice that on February 4, 2011, Big Rivers Electric Corporation (Big Rivers) filed a notice of cancellation of its...

  17. Hydraulics and morphology of mountain rivers; literature survey

    NARCIS (Netherlands)

    Sieben, J.

    1993-01-01

    Present knowledge on fluvial processes in mountain rivers should be expanded to enable the development of projects dealing with mountain rivers or mountain-river catchment areas. This study reviews research on hydraulic and morphological features of mountain rivers. A major characteristic of mountai

  18. River Data Package for Hanford Assessments

    Energy Technology Data Exchange (ETDEWEB)

    Rakowski, Cynthia L.; Guensch, Gregory R.; Patton, Gregory W.

    2006-08-01

    This data package documents the technical basis for selecting physical and hydraulic parameters and input values that will be used in river modeling for Hanford assessments. This work was originally conducted as part of the Characterization of Systems Task of the Groundwater Remediation Project managed by Fluor Hanford, Inc. and revised as part of the Characterization of Systems Project managed by PNNL for DOE. The river data package provides calculations of flow and transport in the Columbia River system. The module is based on the legacy code for the Modular Aquatic Simulation System II (MASS2), which is a two-dimensional, depth-averaged model that provides the capability to simulate the lateral (bank-to-bank) variation of flow and contaminants. It simulates river hydrodynamics (water velocities and surface elevations), sediment transport, contaminant transport, biotic transport, and sediment-contaminant interaction, including both suspended sediments and bed sediments. This document presents the data assembled to run the river module components for the section of the Columbia River from Vernita Bridge to the confluence with the Yakima River. MASS2 requires data on the river flow rate, downstream water surface elevation, groundwater influx and contaminants flux, background concentrations of contaminants, channel bathymetry, and the bed and suspended sediment properties. Stochastic variability for some input parameters such as partition coefficient (kd) values and background radionuclide concentrations is generated by the Environmental Stochastic Preprocessor. River flow is randomized on a yearly basis. At this time, the conceptual model does not incorporate extreme flooding (for example, 50 to 100 years) or dam removal scenarios.

  19. The Mississippi River: A place for fish

    Science.gov (United States)

    Schramm, Harold; Ickes, Brian; Chen, Yushun; Chapman, Duane C.; Jackson, John; Chen, Daqing; Li, Zhongjie; Kilgore, Jack; Phelps, Quinton; Eggleton, Michael

    2016-01-01

    The Mississippi River flows 3,734 km from its source at Lake Itasca, Minnesota to its outlet at the Gulf of Mexico. Along its course, it collects water from portions of two Canadian provinces and 41 % of the conterminous United States. Although greatly altered for navigation and flood control throughout much of its length, the Mississippi River remains an important fishery resource that provides habitat for 188 species of fishes and recreational and commercial fishing opportunities. The objectives of this chapter are to describe the contemporary fisheries habitat throughout the Mississippi River, identify how management to achieve human benefits influences the fishes and their habitats, and summarize efforts to conserve and enhance fish habitat. The 826-km headwater reach is entirely in Minnesota and remains largely unaltered. The reaches that extend 1,059 km from St. Anthony Falls, Minnesota to above the confluence with the Missouri River near St. Louis, Missouri have been altered by impoundment that has affected floodplain function, increased sedimentation of backwaters, and homogenized the formerly diverse aquatic habitats. After the confluence with the Missouri River, the Mississippi River flows freely for 1,849 km to the Gulf of Mexico. The alterations of the free-flowing reaches of greatest significance to the fisheries resource are reducing the duration and height of the flood pulse as a consequence of shortening the river channel, disconnection of the river from its historic and present floodplain, and loss of secondary channel-island complexes. Engineering features to improve commercial navigation have also added habitat and, when wisely manipulated, can be used to rehabilitate habitat. Some aspects of water quality have improved, but legacy chemicals and nutrient-laden inflows and sediments remain problems. Although true restoration in the sense of restoring all environmental conditions to an unaltered state is unlikely, the future value of the

  20. River Basin Standards Interoperability Pilot

    Science.gov (United States)

    Pesquer, Lluís; Masó, Joan; Stasch, Christoph

    2016-04-01

    There is a lot of water information and tools in Europe to be applied in the river basin management but fragmentation and a lack of coordination between countries still exists. The European Commission and the member states have financed several research and innovation projects in support of the Water Framework Directive. Only a few of them are using the recently emerging hydrological standards, such as the OGC WaterML 2.0. WaterInnEU is a Horizon 2020 project focused on creating a marketplace to enhance the exploitation of EU funded ICT models, tools, protocols and policy briefs related to water and to establish suitable conditions for new market opportunities based on these offerings. One of WaterInnEU's main goals is to assess the level of standardization and interoperability of these outcomes as a mechanism to integrate ICT-based tools, incorporate open data platforms and generate a palette of interchangeable components that are able to use the water data emerging from the recently proposed open data sharing processes and data models stimulated by initiatives such as the INSPIRE directive. As part of the standardization and interoperability activities in the project, the authors are designing an experiment (RIBASE, the present work) to demonstrate how current ICT-based tools and water data can work in combination with geospatial web services in the Scheldt river basin. The main structure of this experiment, that is the core of the present work, is composed by the following steps: - Extraction of information from river gauges data in OGC WaterML 2.0 format using SOS services (preferably compliant to the OGC SOS 2.0 Hydrology Profile Best Practice). - Model floods using a WPS 2.0, WaterML 2.0 data and weather forecast models as input. - Evaluation of the applicability of Sensor Notification Services in water emergencies. - Open distribution of the input and output data as OGC web services WaterML, / WCS / WFS and with visualization utilities: WMS. The architecture

  1. Raft River Geothermal Aquaculture Experiment. Phase II

    Energy Technology Data Exchange (ETDEWEB)

    Campbell, D.K.; Rose, F.L.; Kent, J.C.; Watson, L.R.; Sullivan, J.F.

    1979-08-01

    Channel catfish, tilapia and Malaysian prawns were cultured directly in geothermal water for approximately seven months at the Department of Energy, Raft River Geothermal Site, to evaluate the organisms throughout a grow-out cycle. Parameters evaluated included survival, growth, bioaccumulation of metals and fluoride, collagen synthesis, and bone calcium levels. Growth at Raft River was slightly lower than at a companion commercial facility at Buhl, Idaho, but was attributed to facility differences rather than an adverse impact of geothermal water. No significant differences were recorded between Raft River and Buhl fish for bone calcium or collagen concentrations. No significant accumulation of heavy metals by fish or prawns was recorded.

  2. Aquatic macroinvertebrates of the Jablanica river, Serbia

    Directory of Open Access Journals (Sweden)

    Stefanović Katarina S.

    2009-01-01

    Full Text Available Research on the community of aquatic macroinvertebrates was carried out during 2005 and 2006 at four sampling sites along the Jablanica River, a right-hand tributary of the Kolubara River. Fifty-seven taxa were recorded in the course of the investigation. The most diverse group was Ephemeroptera, followed by Trichoptera and Plecoptera. Members of the Rhitrogena semicolorata group were the most abundant. Our results could be the basis for evaluation of the influence of damming of the Jablanica River on the status of its water and can serve as a model for studying the influ­ence of hydromorphological degradation of aquatic ecosystems.

  3. Managing Fine Sediment in Regulated Rivers

    Science.gov (United States)

    Schmidt, J. C.

    2015-12-01

    A paradigm useful in managing dams and diversions is that the combined effects of changing flow regime and sediment supply perturb regulated rivers into sediment deficit or sediment surplus. In the U.S. Southwest, large dams constructed on interregional rivers typically create sediment deficit segments >100 km long. Further downstream, sediment surplus may occur if desert tributaries deliver sufficient amounts of fine sediment, such as parts of the Rio Grande, lower Green River, and Colorado River delta. Sediment surplus also occurs on most smaller regional rivers. The protocols for managing rivers perturbed into sediment deficit have been refined for the Colorado River downstream from Glen Canyon Dam but are nonetheless challenged by externally determined water-supply agreements that require annual water deliveries that sometimes occur when there has been little tributary resupply. Virtually all of the naturally supplied sand to the depleted, 100-km long Marble Canyon comes from the Paria River. The sand delivery rate since 2012 was sufficiently large to trigger short-duration controlled floods under the High Flow Experiment (HFE) Protocol. The sand mass balance of Marble Canyon since 2012 when the HFE Protocol was adopted was positive due to the combination of relatively large sand delivery from the Paria River and average total annual flows. Large total annual flows have the potential to export large amounts of sand and create a negative sand mass balance. Despite the challenge of managing a scarce and highly variable sand supply and occasional years of large reservoir releases, the long-term (2006-2015) sand mass balance for the upstream half of Marble Canyon is indeterminant and is positive for the downstream half of Marble Canyon. The apparent success of managing sand in Grand Canyon under deficit conditions suggests that fine sediment management protocols might be developed for other regulated rivers. Implementation would require establishment of networks of

  4. Seepage Investigation for Selected River Reaches in the Chehalis River Basin, Washington

    Science.gov (United States)

    Ely, D. Matthew; Frasl, Kenneth E.; Marshall, Cameron A.; Reed, Fred

    2008-01-01

    A study was completed in September 2007 in the Chehalis River basin to determine gain or loss of streamflow by measuring discharge at selected intervals within various reaches along the Chehalis River and its tributaries. Discharge was measured at 68 new and existing streamflow sites, where gains and losses were determined for 36 stream reaches. Streamflow gains were measured for 22 reaches and losses were measured for 13 reaches. No gain or loss was measured at the Chehalis River between the Newaukum and Skookumchuck Rivers. The Chehalis River exhibited a pattern of alternating gains and losses as it entered the area of wide, gentle relief known as the Grand Mound Prairie. The general pattern of tributary ground- and surface-water interaction was discharge to streams (gaining reaches) in the upper reaches and discharge to the ground-water system (losing reaches) as the tributaries entered the broad, flat Chehalis River valley.

  5. Count of Sockeye Salmon (Oncorhynchus nerka), River Temperature, and River Height in the Pilgrim River, Nome, Alaska, 2003-2014

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The dataset is the daily count of Sockeye Salmon (Oncorhynchus nerka) passing through a fish counting weir on the Pilgrim River from 2003 to 2014. Also, included in...

  6. Merging imagery and models for river current prediction

    Science.gov (United States)

    Blain, Cheryl Ann; Linzell, Robert S.; McKay, Paul

    2011-06-01

    To meet the challenge of operating in river environments with denied access and to improve the riverine intelligence available to the warfighter, advanced high resolution river circulation models are combined with remote sensing feature extraction algorithms to produce a predictive capability for currents and water levels in rivers where a priori knowledge of the river environment is limited. A River Simulation Tool (RST) is developed to facilitate the rapid configuration of a river model. River geometry is extracted from the automated processing of available imagery while minimal user input is collected to complete the parameter and forcing specifications necessary to configure a river model. Contingencies within the RST accommodate missing data such as a lack of water depth information and allow for ensemble computations. Successful application of the RST to river environments is demonstrated for the Snohomish River, WA. Modeled currents compare favorably to in-situ currents reinforcing the value of the developed approach.

  7. Hydrochemistry and Its Effect Factors of River in the Yarlung Tsangpo River (Upper Brahmaputra River), Southern Tibet Plateau

    Science.gov (United States)

    Yan, N.; Wu, G.

    2016-12-01

    The Yarlung Tsangpo River originating from the southern Tibetan Plateau is the largest river in Tibet and also the highest altitude river in the world. Its water resource has significant effect on local economy, environment and ecology. This study focuses on the chemical composition and its controlling factors of the Yarlung Tsangpo River. The TDS of river water had a broadly range with an average of 198 mg L-1 (46-637 mg L-1) in December and 206 mg L-1 (48-531 mg L-1) in August. Ca2+ and HCO3- were the dominant ions, accounting for 46 % and 65 % in total molar concentration of cations and anions in December and for 59 % and 73 % in total molar concentration of cations and anions in August. According to a forward model, in August, the calculated results showed that the proportion of silicate components to TZ+ in river was 17.4 % (13.4 %-19.2 %) in the mainstream and 15.6 % (5.2 %-31.5 %) in its tributaries. The carbonates weathering contributed 56.8 % (53.1 %-61.9 %) for mainstream and 51.4 % (27.8 %-72.0 %) for its tributaries to dissolved components of river. In December, the contributions from silicate and carbonate were an average of 25.7 % (18.2 %-34.9 %) and 50 % (38.4%-59.3 %) for mainstream, and 23.5 % (6.3 %-54.4 %) and 49.9 % (9.3 %-78.0 %) for its tributaries in this study area. Therefore, the products of rock weathering are dominantly influencing factors for water chemistry of the Yarlung Tsangpo River. In addition, the better power function relationship existed between TDS and TSS (R2=0.76) in high flow period indicating the physical erosion can promote the chemical weathering of rocks through providing fresh mineral exposure in this study area.

  8. Phenomena and characteristics of barrier river reaches in the middle and lower Yangtze River, China

    Science.gov (United States)

    You, Xingying; Tang, Jinwu

    2017-06-01

    Alluvial river self-adjustment describes the mechanism whereby a river that was originally in an equilibrium state of sediment transport encounters some disturbance that destroys the balance and results in responses such as riverbed deformation. A systematic study of historical and recent aerial photographs and topographic maps in the Middle and Lower Reaches of the Yangtze River (MLYR) shows that river self-adjustment has the distinguishing feature of transferring from upstream to downstream, which may affect flood safety, waterway morphology, bank stability, and aquatic environmental safety over relatively long reaches downstream. As a result, it is necessary to take measures to control or block this transfer. Using the relationship of the occurrence time of channel adjustments between the upstream and downstream, 34 single-thread river reaches in the MLYR were classified into four types: corresponding, basically corresponding, basically not corresponding, not corresponding. The latter two types, because of their ability to prevent upstream channel adjustment from transferring downstream, are called barrier river reaches in this study. Statistics indicate that barrier river reaches are generally single thread and slightly curved, with a narrow and deep cross-sectional morphology, and without flow deflecting nodes in the upper and middle parts of reaches. Moreover, in the MLYR, barrier river reaches have a hydrogeometric coefficient of {}1.2‱, a silty clay content of the concave bank {>}{9.5}%, and a median diameter of the bed sediment {>}{0.158} mm. The barrier river reach mechanism lies in that can effectively centralise the planimetric position of the main stream from different upstream directions, meaning that no matter how the upper channel adjusts, the main stream shows little change, providing relatively stable inflow conditions for the lower reaches. Regarding river regulation, it is necessary to optimise the benefits of barrier river reaches; long river

  9. EVALUATION OF WATER AND SEDIMENT QUALITIES AT RIVER MOUTHS IN THE HAIHE RIVER SYSTEM

    Institute of Scientific and Technical Information of China (English)

    Cheng LIU; Zhaoyin WANG; Yun HE; Dongsheng CHENG

    2007-01-01

    Water and sediment qualities are studied by analyzing samples taking from the mouths of the Haihe, Duliujian, New Ziya and Beipai rivers in the Haihe river basin in north China in 2005 and 2001, in order to find the changes of water and sediment pollutions. The concentrations of heavy metals, arsenic, total nitrogen (TN) and total phosphorus (TP) are analyzed and results have been compared for the two times. The in-situ measurement for Dissolved Oxygen (DO) and Sediment Oxygen Demand (SOD) rates were carried at the Haihe and Duliujian river mouths in 2006. The results show that the waters of the 4 river mouths are still seriously polluted, though much improved in the case of the Haihe and Duliujian rivers. The main pollutants are TP and TN in the New Ziya and Beipai rivers and mercury (Hg) at all 4 river mouths. Compared with those in 2001, the concentrations of almost all metals and arsenic in the 4 river mouths have decreased. Water quality at Haihe and Duliujian shows an improving trend, while the water quality at Beipai is similar to that of 2001. In contrast, water at the New Ziya river mouth is more severely polluted. The sediments in the 4 river mouths are not seriously polluted by heavy metals but are polluted by nitrogen and phosphorus. Most of the pollutant contents in the sediments show little change between 2001 and 2005. The in-situ DO and SOD measurement shows that the waters at the Haihe river mouth is in the state of oxygen depletion, and SOD is important consumer of DO at the river mouths. The overall analysis shows that increasing water pollution and eutrophication in waters far from cities are ongoing causes of concern.

  10. RIVER WATER QUALITY IN THE LOWER CATCHMENT OF THE ARGEȘ RIVER

    Directory of Open Access Journals (Sweden)

    MARIANA SOARE

    2015-10-01

    Full Text Available The rivers water quality in the lower catchment area of Arges River varies from one sector to another, influenced by both natural and anthropic factors. In this context, the present paper, the surface waters were divided in quality categories as required by law. Thus, the ecological condition of river streams was evaluated on the basis of biological, chemical and phisico-chemical quality indicators and specific pollutant which have an influence on the biological indicators.

  11. Simplifying dynamic river water quality modelling: A case study of inorganic nitrogen dynamics in the Crocodile River (South Africa).

    CSIR Research Space (South Africa)

    Deksissa, T

    2004-06-01

    Full Text Available and river water quality in the future. A simplified river water quality model was formulated based on a conceptual hydraulic sub-model and simplification of an existing river water quality model. The simplified water quality was derived from the River Water...

  12. 78 FR 1936 - Tongue River Railroad Company, Inc.-Rail Construction and Operation-In Custer, Powder River and...

    Science.gov (United States)

    2013-01-09

    ... a proceeding known as Tongue River III.\\3\\ \\1\\ Tongue River R.R.--Rail Constr. and Operation--In....2d 758 (9th Cir.), cert. denied, 484 U.S. 976 (1987). \\2\\ Tongue River R.R.--Rail Constr. and..., 1996). \\3\\ Tongue River R.R.--Rail Constr. and Operation--Western Alignment, FD 30186 (Sub-No. 3) (STB...

  13. 50 CFR Table 3 to Part 226 - Hydrologic Units Containing Critical Habitat for Snake River Sockeye Salmon and Snake River...

    Science.gov (United States)

    2010-10-01

    ... Habitat for Snake River Sockeye Salmon and Snake River Spring/Summer and Fall Chinook Salmon 3 Table 3 to... Part 226—Hydrologic Units Containing Critical Habitat for Snake River Sockeye Salmon and Snake River... Snake—Asotin 17060103 17060103 17060103 Upper Grande Ronde 17060104 Wallowa 17060105 Lower Grande...

  14. 78 FR 37216 - Sabine River Authority of Texas and Sabine River Authority, State of Louisiana; Notice of...

    Science.gov (United States)

    2013-06-20

    ... Energy Regulatory Commission Sabine River Authority of Texas and Sabine River Authority, State of...) for the project. The existing project is located on the Sabine River between river mile (RM) 147 and RM 279, affecting lands and ] waters in Panola, Shelby, Sabine, and Newton Counties, Texas, and...

  15. 78 FR 79434 - Sabine River Authority of Texas and Sabine River Authority, State of Louisiana; Notice of...

    Science.gov (United States)

    2013-12-30

    ... Energy Regulatory Commission Sabine River Authority of Texas and Sabine River Authority, State of...) for the project. The existing project is located on the Sabine River between river mile (RM) 147 and RM 279, affecting lands and waters in Panola, Shelby, Sabine, and Newton Counties, Texas, and De...

  16. 77 FR 67563 - Regulated Navigation Area-New Haven Harbor, Quinnipiac River, Mill River, New Haven, CT; Pearl...

    Science.gov (United States)

    2012-11-13

    ... River, Mill River, New Haven, CT; Pearl Harbor Memorial Bridge (Interstate 95) Construction AGENCY... area which will be needed during construction of the new Pearl Harbor Memorial Bridge, and which could...) entitled Regulated Navigation Area--New Haven Harbor, Quinnipiac River, Mill River, New Haven, CT;...

  17. River Data Package for the 2004 Composite Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Rakowski, Cynthia L.; Guensch, Gregory R.; Patton, Gregory W.

    2004-08-01

    Beginning in fiscal year 2003, the DOE Richland Operations Office initiated activities, including the development of data packages, to support the 2004 Composite Analysis. The river data package provides calculations of flow and transport in the Columbia River system. This document presents the data assembled to run the river module components for the section of the Columbia River from Vernita Bridge to the confluence with the Yakima River.

  18. Taking the Pulse of a River System: Research on the Upper Mississippi River System

    Science.gov (United States)

    Sauer, Jennifer; Johnson, Barry

    2009-01-01

    Mark Twain raved about the Mississippi River basin as, 'the body of the Nation'. The 'upper body', upstream of the confluence with the Ohio River, includes commercially navigable reaches and branching tributaries that are recreationally and environmentally important. Together they feed and shelter an array of fish and wildlife in their flowing channels, floodplain lakes, backwaters, wetlands, and floodplain forests. Effective river management requires knowledge about factors controlling the dynamics and interactions of important ecosystem components. The Long Term Resource Monitoring Program (LTRMP) is the prized diagnostic tool in the Environmental Management Program for the Upper Mississippi River System that provides critical information about the status and trends of key environmental resources.

  19. The Three Colorado Rivers: Comparing the Physical, Legal, and Economic Allocation of a Shared River

    Science.gov (United States)

    Rushforth, R.; Ruddell, B. L.

    2015-12-01

    : For many rivers, the legal allocation of surface water was settled decades ago. The process of apportioning surface water between multiple stakeholders is an arduous process with opposing interests competing for scarce resources. The political capital spent initially allocating a river often cannot be regained, stymieing future attempts for re-allocation. The Colorado River Compact (Compact), signed in 1922, has been "the law of the river" for over 90 years. Since its signing, the Colorado River Basin (CRB) population has increased tenfold, while average river flows have decreased due to threats unforeseeable to Compact signers, such as global climate change. Water sharing agreements, like the Compact, legally re-allocate physical river flows; however, water is increasingly shared through trade rather than aqueducts. Virtual water, or the water embodied by a good or service, is a trade adaption to resource scarcity, namely water and land. This study presents findings of a virtual water complement to the Compact. The goal of this study is to determine how the legal allocation of physical water resources are re-allocated as virtual water via economic trade in a shared river basin. Results are presented by at the sub-basin, state, and county-level, showing the geographic origin and destination of virtual water from CRB states and the Upper and Lower basins. A water stress index is calculated to show the indirect water stress of Colorado River water resources and network statistics are employed to rank the importance of virtual water sources in the CRB.

  20. Technical Note: Automatic river network generation for a physically-based river catchment model

    Directory of Open Access Journals (Sweden)

    S. J. Birkinshaw

    2010-09-01

    Full Text Available SHETRAN is a physically-based distributed modelling system that gives detailed simulations in time and space of water flow and sediment and solute transport in river catchments. Standard algorithms for the automatic generation of river channel networks from digital elevation data are impossible to apply in SHETRAN and other similar models because the river channels are assumed to run along the edges of grid cells. In this work a new algorithm for the automatic generation of a river channel network in SHETRAN is described and its use in an example catchment demonstrated.

  1. Technical Note: Automatic river network generation for a physically-based river catchment model

    Science.gov (United States)

    Birkinshaw, S. J.

    2010-09-01

    SHETRAN is a physically-based distributed modelling system that gives detailed simulations in time and space of water flow and sediment and solute transport in river catchments. Standard algorithms for the automatic generation of river channel networks from digital elevation data are impossible to apply in SHETRAN and other similar models because the river channels are assumed to run along the edges of grid cells. In this work a new algorithm for the automatic generation of a river channel network in SHETRAN is described and its use in an example catchment demonstrated.

  2. Technical Note: Automatic river network generation for a physically-based river catchment model

    Directory of Open Access Journals (Sweden)

    S. J. Birkinshaw

    2010-05-01

    Full Text Available SHETRAN is a physically-based distributed modelling system that gives detailed simulations in time and space of water flow and sediment and solute transport in river catchments. Standard algorithms for the automatic generation of river channel networks from digital elevation data are impossible to apply in SHETRAN and other similar models because the river channels are assumed to run along the edges of grid cells. In this work a new algorithm for the automatic generation of a river channel network in SHETRAN is described and its use in an example catchment demonstrated.

  3. Persistent organochlorine residues in sediments of Haihe River and Dagu Drainage River in Tianjin, China

    Institute of Scientific and Technical Information of China (English)

    DING Hui; LI Xin-gang; LIU Hun; WANG Jun; SHEN Wei-ran; SUN Yi-chao; SHAO Xiao-long

    2005-01-01

    Persistent organochlorine compounds were analyzed by means of GC-ECD in surface sediment samples from two selected rivers in Tianjin, Haihe River and Dagu Drainage River. A total of 16 surface sediment sites were selected along the both rivers. The frequency of detection of T-HCH and T-DDT in sediment samples both was up to 100%, which illustrated that the contamination of HCH and DDT was widespread in Haihe and Dagu Drainage Rivers. Results indicated that the concentrations of vadous pesticides in sediments from Haihe River were in the range of 3.30-75.96 ng/g dw for T-HCH and 1.57-211.57 ng/g dw for T-DDT. Compared with Haihe River,Dagu Drainage River was contaminated by HCHs and DDTs along the all locations and the values of T-HCH and T-DDT residues in sediments ranged from 2.30 to 124.61 ng/g dw and from 11.28 to 237.30 ng/g dw, respectively. The possible pollution sources were analyzed through monitoring results of organochlorine pesticides(OCPs) residues in sediments from the two rivers. The investigation also indicated that HCH was still used as pesticide in Tianjin partial area.

  4. Delaware River and Upper Bay Sediment Data

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The area of coverage consists of 192 square miles of benthic habitat mapped from 2005 to 2007 in the Delaware River and Upper Delaware Bay. The bottom sediment map...

  5. The Bosna River floods in May 2014

    Science.gov (United States)

    Vidmar, Andrej; Globevnik, Lidija; Koprivšek, Maja; Sečnik, Matej; Zabret, Katarina; Đurović, Blažo; Anzeljc, Darko; Kastelic, Janez; Kobold, Mira; Sušnik, Mojca; Borojevič, Darko; Kupusović, Tarik; Kupusović, Esena; Vihar, Anja; Brilly, Mitja

    2016-10-01

    In May 2014, extreme floods occurred in the lower Sava River basin, causing major damage, with catastrophic consequences. Based on the data gathered, the weather situation in Bosnia and Herzegovina's (BiH) Bosna River basin was analysed and the hydrological conditions were provided, including the results of the probability analysis of the size of the recorded precipitation and flow rates. According to the observed data, extremely high precipitation intensities produced specific discharges of 1.0 m3 s-1 km-2. A hydrological model of the Bosna River basin was developed using HBV light for the purposes of reconstructing and forecasting such events more effectively. All analyses confirmed that the May 2014 event was an extreme extraordinary event whose return period greatly exceeds 100 years. The study is the basis for further flood safety measures and flood forecast development in the Bosna River basin.

  6. Columbia River ESI: FISH (Fish Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for marine, estuarine, anadromous, and freshwater fish species in Columbia River. Vector polygons in this...

  7. Umpqua River Oregon Active Channel 2005

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Umpqua River drains 12,103 square kilometers (4,673 square miles) in southwest Oregon before flowing into the Pacific Ocean at Winchester Bay near the city of...

  8. Geology of the Johnson River Area Alaska

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The vegetation, topography, and geology of the Johnson River area are representative of the entire eastern interior region of Alaska. This area has a vegetational...

  9. Ecological flow requirements for South African rivers

    CSIR Research Space (South Africa)

    Ferrar, AA

    1989-01-01

    Full Text Available This document contains the proceedings of a workshop which was convened to debate the ecological flow requirements of South African rivers. Topics which are discussed include the influence of weirs and impoundments, the quantity requirements...

  10. Russian River Interim Action Management Plan

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — An interim action plan is presented to guide the 1979 management of the Kenai National Moose Range's portion of the lower Russian River and its confluence with the...

  11. Advanced separations at Savannah River Site

    Energy Technology Data Exchange (ETDEWEB)

    Thompson, M.; McCabe, D.

    1996-10-01

    The Savannah River Site (SRS) has many waste streams that are contaminated with radionuclides and/or hazardous materials that must be treated to remove the radioactivity (cesium, strontium, tritium, actinides) and hazardous components (polychlorinated biphenyls (PCBs), cyanide, metal ions).

  12. Spring staging waterfowl on the Naknek River

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Alaska Peninsula/Becharof National Wildlife Refuge staff conducted a survey of spring staging waterfowl on the Naknek River in the Bristol Bay drainage, Alaska...

  13. Little River NWR Inventory and Monitoring Plan

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This Inventory and Monitoring Plan for Little River National Wildlife Refuge is a step-down from the Comprehensive Conservation Plan and Forest Habitat Management...

  14. Savannah River Site Environmental Report for 1997

    Energy Technology Data Exchange (ETDEWEB)

    Arnett, M.W.; Mamatey, A.R. [eds.

    1998-08-01

    The mission at the Savannah River Site has changed from the production of nuclear weapons materials for national defense to the management of waste, restoration of the environment, and the development of industry in and around the site.

  15. Offshore extension of Gomati river, Dwarka

    Digital Repository Service at National Institute of Oceanography (India)

    Vora, K.H.; Naik, D.K.; Ganesan, P.; Moraes, C.

    ) at National Institute of Oceanography (NIO), Goa, India since 1984. Based on about 40 line-kilometres of echosounding, Side Scan Sonar and Shallow Seismic Profiling carried out in December 1989, underwater extension of the river Gomati has been mapped...

  16. Radionuclide transport in the Yenisei River

    CERN Document Server

    Vakulovsky, S M; Kabanov, A I

    2012-01-01

    Data characterizing the pollution of the Yenisei River (water and bottom sediment) by radionuclide resulting from the use of the river water for cooling industrial reactors in the Mining-Chemical Complex are presented. Studies have been made of the contamination of the river during the period when reactors with direct flow cooling were used and after these were shut down. Distinctive features of the migration of radionuclide in the Yenisei are noted, in particular, their distribution between the solid and liquid phases. The amounts of 137Cs, 65Zn, 60Co, 54Mn, and 152Eu in the channel are determined from the effluent discharge site to Dudinka port. The rate of continuous self removal of 137Cs is estimated to be 0.19 1/year, corresponding to a half purification time of 3.6 years for a 600 km long segment of the river bed.

  17. Middle Mississippi River Sturgeon Preliminary Contaminants Investigation

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — We examined the health of forty-one wild caught sturgeon from a reach of the Mississippi River with an organochlorine consumption advisory and a reference site. The...

  18. Umpqua River Oregon Active Channel 2009

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Umpqua River drains 12,103 square kilometers (4,673 square miles) in southwest Oregon before flowing into the Pacific Ocean at Winchester Bay near the city of...

  19. Contaminant levels in the Sudbury River, Massachusetts

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Great Meadows National Wildlife Refuge sits astride the Concord and Sudbury Rivers in portions of the towns of Bedford, Billerica, Lincoln, Carlisle, Concord, and...

  20. Parker River NWR : Revised Hunting Plan

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This document contains revisions to the 1978 Parker River National Wildlife Refuge Hunt Management Plan. Refuge hunters must obtain a permit to use the hunting...

  1. Climate influences on Vaal River flow

    African Journals Online (AJOL)

    2016-04-02

    Apr 2, 2016 ... Keywords: Vaal River, hydro-meteorology, climate influence. INTRODUCTION ... rainfall fluctuate from year to year (CV = 0.3), a constraint to pro- duction and ..... African Weather Bureau Technical Paper 14. South African.

  2. Jiaxing: Delicacy of the Yangtze River Delta

    Institute of Scientific and Technical Information of China (English)

    WUXINYI; WANGNAN

    2004-01-01

    THE yangtze River Delta,where the Yangtzc River crosses China's east coast,has one of the country's most dynamic economies.In 1976Jcan Gottmann.a french geographer,called shanghai and its neighboring Yangtze River Delta the world's "sixth largest megalopolis." The Yangtze River Delta has 15 cities. Its territory accounts for one percent of China's total, 5.8 percent of hthe population, and 19.5 percent of the national GDP.In terms of both aggregate economy and growth speed, the Delta currently leads China and could likely be the "enginc" of the world's future economic growth. Located at the juncition of Shanghai Jiangsu and Zhejiang, Jiaxing City holds a central economic belt. It is within 100 kilometers of Shanghai, Hangzhou and Suzhou. In 200 and 2003, Jiaxing's GDP growth rate was first in Zhejiang Province and second among the 1.5 Delta cities.

  3. Hydrography - MO 2005 Major Rivers (SHP)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — The MAJOR_RIVERS data set is a subset of the NHDPlus based on the associated THINNERCOD data that is delivered separately from the flowline geometry. The NHDPlus...

  4. Using river locks to teach hydrodynamic concepts

    Science.gov (United States)

    Carvalho-Santos, Vagson L.; Mendes, Thales C.; Silva, Enisvaldo C.; Rios, Márcio L.; Silva, Anderson A. P.

    2013-11-01

    In this work, the use of a river lock as a non-formal setting for teaching hydrodynamical concepts is proposed. In particular, we describe the operation of a river lock situated at the Sobradinho dam, on the São Francisco River (Brazil). A model to represent and to analyse the dynamics of river lock operation is presented and we derive the dynamical equations for the rising of the water column as an example to understand the Euler equation. Furthermore, with this activity, we enable the integration of content initially introduced in the classroom with practical applications, thereby allowing the association of physical themes to content relevant in disciplines such as history and geography. In addition, experiences of this kind enable teachers to talk about the environmental and social impacts caused by the construction of a dam and, consequently, a crossover of concepts has been made possible, leading to more meaningful learning for the students.

  5. Raft River geoscience case study: appendixes

    Energy Technology Data Exchange (ETDEWEB)

    Dolenc, M.R.; Hull, L.C.; Mizell, S.A.; Russell, B.F.; Skiba, P.A.; Strawn, J.A.; Tullis, J.A.

    1981-11-01

    The following are included in these appendices: lithology, x-ray analysis, and cores; well construction data; borehole geophysical logs; chemical analyses from wells at the Raft River geothermal site; and bibliography. (MHR)

  6. Heavy metals in Mindhola river estuary, India

    Digital Repository Service at National Institute of Oceanography (India)

    Zingde, M.D.; Rokade, M.A; Mandalia, A

    The heavy metal concentrations are studied along the Mindhola river estuary. Surface and bottom water samples were collected using Niskin Sampler. The sediment samples were collected using a Van Veen grab. The heavy metal concentration is estimated...

  7. River Network Modeling Beyond Discharge at Gauges

    Science.gov (United States)

    David, C. H.; Famiglietti, J. S.; Salas, F. R.; Whiteaker, T. L.; Maidment, D. R.; Tolle, K.

    2014-12-01

    Over the past two decades, the estimation of water flow in river networks within hydro-meteorological models has mostly focused on simulations of natural processes and on their verification at available river gauges. Despite valuable existing skills in hydrologic modeling the accounting for anthropogenic actions in current models remains limited. The emerging availability of datasets containing measured dam outflows and reported irrigation withdrawals motivates their inclusion into simulations of flow in river networks. However, the development of advanced river network models accounting for such datasets of anthropogenic influences requires a detailed data model and a thorough handling of the various data types, sources and time scales. This contribution details the development of a consistent data model suitable for accounting some observations of anthropogenic modifications of the surface water cycle and presents the impact of such inclusion on simulations using the Routing Application for Parallel computatIon of Discharge (RAPID).

  8. Parker River National Wildlife Refuge : Refuge Objectives

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This document lists the objectives of Parker River National Wildlife Refuge. Topics outlined in this plan include wildlife-wildlands interpretation,...

  9. Columbia River ESI: FISHL (Fish Lines)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for anadromous fish species in Columbia River. Vector lines in this data set represent locations of...

  10. Coldwater River NWR Ancillary Bird Observations 2006

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Ancillary bird observations on Coldwater River NWR in 2006 were recorded by local birders. No sampling design was used to generate the observations

  11. Coldwater River NWR Ancillary Bird Observations 2009

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Ancillary bird observations on Coldwater River NWR in 2009 were recorded by local birders. No sampling design was used to generate the observations

  12. Coldwater River NWR Bird Observations 2007

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Bird observations on Coldwater River NWR in 2007 were recorded by the refuge biologist and several other birders. No sampling design was used to generate the...

  13. Columbia River ESI: MGT (Management Area Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive human-use data for Wildlife Refuges, National Forests, and State Parks for the Columbia River area. Vector polygons in this data set...

  14. Connecting River Systems Restoration Assessment Degree Flowlines

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This represents the flowline network in Connecting River Systems Restoration Assessment (CRSRA). It is attributed with the number of disconnections between the reach...

  15. (CLUPEIDAE) FROM CROSS RIVER ESTUARY, NIGERIA

    African Journals Online (AJOL)

    Scales and sand were secondary items while macrophyte matters ... the same item throughout the years, the food resources were considered important factor in the elimination of the fish ... ecology of this fish from the Cross River estuary,.

  16. Hudson River Sub-Bottom Profile Points

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Hudson River Estuary Shallow Water Surveys. Subbottom Profile Points. Subbottom data was collected November 5 to December 15, 2009, in the estuary north from...

  17. Roanoke River National Wildlife Refuge Vegetation Classification

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Land cover image for Roanoke River National Wildlife Refuge, in coastal North Carolina. Data was used to map the plant communities on the refuge from the data source...

  18. Using river locks to teach hydrodynamic concepts

    CERN Document Server

    Carvalho-Santos, Vagson L; Silva, Enisvaldo C; Rios, Márcio L; Silva, Anderson A P

    2013-01-01

    In this work, the use of a river lock as a non-formal setting for teaching Q2 hydrodynamical concepts is proposed. In particular, we describe the operation of a river lock situated at the Sobradinho dam, on the S\\~ao Francisco River (Brazil). A model to represent and to analyse the dynamics of river lock operation is presented and we derive the dynamical equations for the rising of the water column as an example to understand the Euler equation. Furthermore, with this activity, we enable the integration of content initially introduced in the classroom with practical applications, thereby allowing the association of physical themes to content relevant in disciplines such as history and geography. In addition, experiences of this kind enable teachers to talk about the environmental and social impacts caused by the construction of a dam and, consequently, a crossover of concepts has been made possible, leading to more meaningful learning for the students.

  19. Columbia River ESI: INVERT (Invertebrate Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for clams, oysters, crabs, and other invertebrate species in Columbia River. Vector polygons in this data...

  20. Columbia River ESI: NESTS (Nest Points)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for bird nesting sites in the Columbia River area. Vector points in this data set represent locations of...