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Sample records for brazos river

  1. 75 FR 8491 - Security Zones; Brazos River, Freeport, TX

    Science.gov (United States)

    2010-02-25

    ... vessels, waterfront facilities, and surrounding areas from destruction, loss, or injury caused by... the Port of Freeport. Recreational and commercial fishing vessels are to transit the Brazos River...; Brazos River, Freeport, TX in the Federal Register (74 FR 61305). We received no comments on the...

  2. Natural sources of salinity in the Brazos River, Texas with particular reference to the Croton and salt Croton Creek basins

    Science.gov (United States)

    Baker, R.C.; Hughes, Leon S.; Yost, I.D.

    1964-01-01

    The average daily load of the Brazos River at Possum Kingdom Reservoir is about 2,800 tons of dissolved solids, of which 1,000 tons is chloride. More than 85 percent of the chloride load is contributed by the Salt Fork Brazos River, and more than 50 percent of the chloride load of the Brazos River originates from salt springs and seeps in Croton and Salt Crotdn Creeks, which are tributaries of Salt Fork Brazos River. The rest of the chloride is contributed from many small sources.

  3. Chemical quality of surface waters in the Brazos River basin in Texas

    Science.gov (United States)

    Irelan, Burdge; Mendieta, H.B.

    1964-01-01

    The Brazos River basin, which makes up 15 percent of the land area of Texas, extends from the High Plains, where altitudes reach 4,200 feet and the average precipitation ranges from 15 to 20 inches a year, to the Gulf of Mexico where the annual rainfall is 45-^50 inches. Large reservoirs have been built in the Brazos River basin, but the use of the stored water has been limited because the salinity often makes the water undesirable for municipal and industrial use. However, the water is generally satisfactory for irrigation. Records for the Brazos River show that the salinity of the water was a problem even as early as 1906 and that the water more often than not failed to meet today's chemical-quality standards for a municipal supply.

  4. Impacts of golden alga Prymnesium parvum on fish populations in reservoirs of the upper Colorado River and Brazos River basins, Texas

    Science.gov (United States)

    VanLandeghem, Matthew M.; Farooqi, Mukhtar; Farquhar, B.; Patino, Reynaldo

    2013-01-01

    Several reservoirs in the upper Colorado River and Brazos River basins in Texas have experienced toxic blooms of golden alga Prymnesium parvum and associated fish kills since 2001. There is a paucity of information, however, regarding the population-level effects of such kills in large reservoirs, species-specific resistance to or recovery from kills, or potential differences in the patterns of impacts among basins. We used multiple before-after, control-impact analysis to determine whether repeated golden alga blooms have led to declines in the relative abundance and size structure of fish populations. Sustained declines were noted for 9 of 12 fish species surveyed in the upper Colorado River, whereas only one of eight species was impacted by golden alga in the Brazos River. In the upper Colorado River, White Bass Morone chrysops, White Crappie Pomoxis annularis, Largemouth Bass Micropterus salmoides, Bluegill Lepomis macrochirus, River Carpsucker Carpiodes carpio, Freshwater Drum Aplodinotus grunniens, Channel Catfish Ictalurus punctatus, Flathead Catfish Pylodictis olivaris, and Blue Catfish I. furcatus exhibited sustained declines in relative abundance, size structure, or both; Gizzard Shad Dorosoma cepedianum, Longnose Gar Lepisosteus osseus, and Common Carp Cyprinus carpio did not exhibit those declines. In the Brazos River, only the relative abundance of Blue Catfish was impacted. Overall, toxic golden alga blooms can negatively impact fish populations over the long-term, but the patterns of impact can vary considerably among river basins and species. In the Brazos River, populations of most fish species appear to be healthy, suggesting a positive angling outlook for this basin. In the upper Colorado River, fish populations have been severely impacted, and angling opportunities have been reduced. Basin-specific management plans aimed at improving water quality and quantity will likely reduce bloom intensity and allow recovery of fish populations to the

  5. Historical Channel Adjustment and Estimates of Selected Hydraulic Values in the Lower Sabine River and Lower Brazos River Basins, Texas and Louisiana

    Science.gov (United States)

    Heitmuller, Franklin T.; Greene, Lauren E.

    2009-01-01

    The U.S. Geological Survey, in cooperation with the Texas Water Development Board, evaluated historical channel adjustment and estimated selected hydraulic values at U.S. Geological Survey streamflow-gaging stations in the lower Sabine River Basin in Texas and Louisiana and lower Brazos River Basin in Texas to support geomorphic assessments of the Texas Instream Flow Program. Channel attributes including cross-section geometry, slope, and planform change were evaluated to learn how each river's morphology changed over the years in response to natural and anthropogenic disturbances. Historical and contemporary cross-sectional channel geometries at several gaging stations on each river were compared, planform changes were assessed, and hydraulic values were estimated including mean flow velocity, bed shear stress, Froude numbers, and hydraulic depth. The primary sources of historical channel morphology information were U.S. Geological Survey hard-copy discharge-measurement field notes. Additional analyses were done using computations of selected flow hydraulics, comparisons of historical and contemporary aerial photographs, comparisons of historical and contemporary ground photographs, evaluations of how frequently stage-discharge rating curves were updated, reviews of stage-discharge relations for field measurements, and considerations of bridge and reservoir construction activities. Based on historical cross sections at three gaging stations downstream from Toledo Bend Reservoir, the lower Sabine River is relatively stable, but is subject to substantial temporary scour-and-fill processes during floods. Exceptions to this characterization of relative stability include an episode of channel aggradation at the Sabine River near Bon Wier, Texas, during the 1930s, and about 2 to 3 feet of channel incision at the Sabine River near Burkeville, Texas, since the late 1950s. The Brazos River, at gaging stations downstream from Waco, Texas, has adjusted to a combination of

  6. Waco Lake, Bosque River, Texas, Brazos River and Tributaries, Texas. Embankment Criteria, Performance and Foundation Report

    Science.gov (United States)

    1990-01-01

    Bosque, Leon and Little Rivers being major tributaries. b. StratiQraphy. Ranging from west to east, geologic formations cropping out include limestones...pore pressure assumptiops were based on the re-evaluation of piezometers and the observed upward excess gra- dients within the Pepper Formation. "S...ft t IXE 1 2 £3 150£ :77, (CL) I.0 -C SUMARYOS OMPCTIN TSTSI l2d0& 4310 A9~ TANDRD ASHO oVAI~ /Jr3 n .flC~tvA flC*Y .Tr.4 to COMACO TESi REOR fa,-.Ec

  7. An overview of historical channel adjustment and selected hydraulic values in the Lower Sabine and Lower Brazos River Basins, Texas and Louisiana

    Science.gov (United States)

    Heitmuller, Franklin T.; Greene, Lauren E.; John D. Gordon, John D.

    2010-01-01

    The Sabine and Brazos are alluvial rivers; alluvial rivers are dynamic systems that adjust their geometry in response to changes in streamflow (discharge) and sediment load. In fluvial geomorphology, the term 'channel adjustment' refers to river channel changes in three geometric dimensions: (1) channel slope (profile); (2) the outline or shape, such as meandering or braided, projected on a horizontal plane (planform); and (3) cross-sectional form (shape). The primary objective of the study was to investigate how the channel morphology of these rivers has changed in response to reservoirs and other anthropogenic disturbances that have altered streamflow and sediment load. The results of this study are expected to aid ecological assessments in the lower Sabine River and lower Brazos River Basins for the Texas Instream Flow Program. Starting in the 1920s, several dams have been constructed on the Sabine and Brazos Rivers and their tributaries, and numerous bridges have been built and sometimes replaced multiple times, which have changed the natural flow regime and reduced or altered sediment loads downstream. Changes in channel geometry over time can reduce channel conveyance and thus streamflow, which can have adverse ecological effects. Channel attributes including cross-section form, channel slope, and planform change were evaluated to learn how each river's morphology changed over many years in response to natural and anthropogenic disturbances. Climate has large influence on the hydrologic regimes of the lower Sabine and lower Brazos River Basins. Equally important as climate in controlling the hydrologic regime of the two river systems are numerous reservoirs that regulate downstream flow releases. The hydrologic regimes of the two rivers and their tributaries reflect the combined influences of climate, flow regulation, and drainage area. Historical and contemporary cross-sectional channel geometries at 15 streamflow-gaging stations in the lower Sabine and

  8. Simulation of streamflow and the effects of brush management on water yields in the Double Mountain Fork Brazos River watershed, western Texas 1994–2013

    Science.gov (United States)

    Harwell, Glenn R.; Stengel, Victoria G.; Bumgarner, Johnathan R.

    2016-04-20

    The U.S. Geological Survey, in cooperation with the City of Lubbock and the Texas State Soil and Water Conservation Board, developed and calibrated a Soil and Water Assessment Tool watershed model of the Double Mountain Fork Brazos River watershed in western Texas to simulate monthly mean streamflow and to evaluate the effects of brush management on water yields in the watershed, particularly to Lake Alan Henry, for calendar years 1994–2013. Model simulations were done to quantify the possible change in water yield of individual subbasins in the Double Mountain Fork Brazos River watershed as a result of the replacement of shrubland (brush) with grassland. The simulation results will serve as a tool for resource managers to guide brush-management efforts.

  9. Urbanization is a major influence on microplastic ingestion by sunfish in the Brazos River Basin, Central Texas, USA.

    Science.gov (United States)

    Peters, Colleen A; Bratton, Susan P

    2016-03-01

    Microplastics, degraded and weathered polymer-based particles, and manufactured products ranging between 50 and 5000 μm in size, are found within marine, freshwater, and estuarine environments. While numerous peer-reviewed papers have quantified the ingestion of microplastics by marine vertebrates, relatively few studies have focused on microplastic ingestion by freshwater organisms. This study documents microplastic and manufactured fiber ingestion by bluegill (Lepomis macrochirus) and longear (Lepomis megalotis) sunfish (Centrarchidae) from the Brazos River Basin, between Lake Whitney and Marlin, Texas, USA. Fourteen sample sites were studied and categorized into urban, downstream, and upstream areas. A total of 436 sunfish were collected, and 196 (45%) stomachs contained microplastics. Four percent (4%) of items sampled were debris on the macro size scale (i.e. >5 mm) and consisted of masses of plastic, metal, Styrofoam, or fishing material, while 96% of items sampled were in the form of microplastic threads. Fish length was statistically correlated to the number of microplastics detected (p = 0.019). Fish collected from urban sites displayed the highest mean number of microplastics ingested, followed by downstream and upstream sites. Microplastics were associated with the ingestion of other debris items (e.g. sand and wood) and correlated to the ingestion of fish eggs, earthworms, and mollusks, suggesting that sunfish incidentally ingest microplastics during their normal feeding methods. The high frequency of microplastic ingestion suggest that further research is needed to determine the residence time of microplastics within the stomach and gut, potential for food web transfer, and adverse effects on wildlife and ecosystemic health.

  10. Projected effects of proposed salinity-control projects on shallow ground water; preliminary results for the upper Brazos River basin, Texas

    Science.gov (United States)

    Garza, Sergio

    1982-01-01

    As part of the plan to control the natural salt pollution in the upper Brazos River basin of Texas, the U.S. Army Corps of Engineers recommended construction of three impoundment and retention reservoirs. In connection with the proposed reservoirs, the U.S. Geological Survey was requested to define the existing ground-water conditions in the shallow ground-water system of the area and to project the post-construction effects of the reservoirs on the shallow aquifer, especially in relation to aquifer-head changes but also with respect to possible changes in the chemical quality of the ground water.

  11. Benthic foraminifera across the K/Pg boundary in the Brazos River area (Texas) and Stevns Klint (Denmark): sequence stratigraphy, sea level change and extinctions.

    Science.gov (United States)

    Hart, Malcolm; Smart, Christopher; Searle, Sarah; Feist, Sean; Leighton, Andrew; Price, Gregory; Twitchett, Richard

    2010-05-01

    While the majority of micropalaeontologists have concentrated on the planktic foraminifera of the Brazos River succession (in order to define the position of the K/T boundary), there are relatively few studies of the benthic foraminifera published. There are a number of sites available for study, including the Brazos River itself and the tributaries of Cottonmouth Creek and Darting Minnow Creek. There have also been a number of drill cores recovered from the area including the Mullinax - 1 core which we have studied. Almost all of the benthic foraminifera recovered from the Mullinax - 1 core were described by Joseph Cushman (1946) in his monograph. The Corsicana Formation (Kemp Formation of the State Geological Map) of latest Maastrichtian age is overlain by the Littig Member of the Kincaid Formation which includes, at its base, the so-called "Event Bed". The base of this unit is the "impact-defined K/T boundary" of many authors (e.g., Yancey, 1996). The "Event Bed" contains a number of discreet (but thin) sedimentary units including spherule-rich layers, shell lags and a number of hummocky sandstone beds (Gale, 2006). In a recent paper, Keller et al. (2009) have identified an "impact" layer below the "Event Bed" and a K/T boundary higher in the succession that most other authors. In the Mullinax - 1 core, there is a diverse fauna of benthic foraminifera, although the species count is much less than that described by Cushman (1946). This is almost certainly the result of the small sample size available in the small diameter core. There is a distinctive assemblage of mid-outer shelf taxa, including agglutinated foramininfera (Tritaxia, Verneuilina, Plectina, etc.) and aragonitic taxa (Epistomina). The numbers of agglutinated taxa in the Mullinax - 1 core are much reduced at the level of the "Event Bed" and this, coupled with the changes in the planktic fauna, indicates a (fairly) marked drop in sea level. Both Yancey (1996) and Gale (2006) argue that this brings the

  12. The Brazos River (Texas) Sequence Shows Significant Cooling in the Waning Stages of the Tsunami Surges Caused by the Chicxulub Impact

    Science.gov (United States)

    Smit, J.; Vellekoop, J.

    2013-05-01

    The Brazos river K-Pg sequences are among the best preserved and studied in the world, yet any interpretation remains highly controversial. Most researchers, however, agree that the coarse clastic deposits are the direct result of a train of Chicxulub impact triggered tsunami surges. Alternative interpretations such as low stand deposits or (super) storm deposits lack sedimentological support. The entire impact related deposit starts with a strong ground shaking from the impact-induced earthquake, disintegrating unconsolidated uppermost Maastrichtian muds, and opening 0.5m deep and 5 m long fissures filled with spherule-rich debris. The disintegrated debris has been taken up in a coarse mass-flow, just underlying the first coarse tsunami deposit containing impact spherules from Chicxulub. One to four distinct tsunami surges follow the basal surge, each leaving a graded coarse to medium sand deposit assembled from coarse debris strewn on the local seafloor such as glauconitic pellets, fish-debris and near coastal foraminifers. The medium-grained sand layers are typically cross-bedded in linguoid and linguoid-climbing current-ripple sets, indicating a dominant S to SE seaward directed flow. Such climbing ripple-sets are found in most tsunami deposits in NE Mexico. These climbing ripples indicate an extremely high suspension load, quickly settling on the seafloor in the waning tsunami surge backflow-currents. Occasionally, the climbing ripple directions are reversed, showing the upflow direction of the incoming tsunami surge. Such linguoid climbing ripple sets have often been mistaken for storm-wave induced hummocky cross-bedding (HCS), leading to storm-deposit hypotheses. The final phase of settling out of the tsunami surges, may be re-suspension due to impact-triggered storms in the Gulf, is represented by continuously graded, very fine-grained sand to silt deposit. This is initially a hard 10 cm thick silty lime-mudstone layer with plant debris, grading into drab

  13. Characterization of geomorphic units in the alluvial valleys and channels of Gulf Coastal Plain rivers in Texas, with examples from the Brazos, Sabine, and Trinity Rivers, 2010

    Science.gov (United States)

    Coffman, David K.; Malstaff, Greg; Heitmuller, Franklin T.

    2011-01-01

    The U.S. Geological Survey, in cooperation with the Texas Water Development Board, described and characterized examples of geomorphic units within the channels and alluvial valleys of Texas Gulf Coastal Plain rivers using a geomorphic unit classification scale that differentiates geomorphic units on the basis of their location either outside or inside the river channel. The geomorphic properties of a river system determine the distribution and type of potential habitat both within and adjacent to the channel. This report characterizes the geomorphic units contained in the river channels and alluvial valleys of Texas Gulf Coastal Plain rivers in the context of the River Styles framework. This report is intended to help Texas Instream Flow Program practitioners, river managers, ecologists and biologists, and others interested in the geomorphology and the physical processes of the rivers of the Texas Gulf Coastal Plain (1) gain insights into how geomorphic units develop and adjust spatially and temporally, and (2) be able to recognize common geomorphic units from the examples cataloged in this report. Recent aerial imagery (high-resolution digital orthoimagery) collected in 2008 and 2009 were inspected by using geographic information system software to identify representative examples of the types of geomorphic units that occurred in the study area. Geomorphic units outside the channels of Texas Gulf Coastal Plain rivers are called \\"valley geomorphic units\\" in this report. Valley geomorphic units for the Texas Gulf Coastal Plain rivers described in this report are terraces, flood plains, crevasses and crevasse splays, flood-plain depressions, tie channels, tributaries, paleochannels, anabranches, distributaries, natural levees, neck cutoffs, oxbow lakes, and constructed channels. Channel geomorphic units occur in the river channel and are subject to frequent stresses associated with flowing water and sediment transport; they adjust (change) relatively quickly in

  14. Trazando el brazo de Vela-Puppis

    Science.gov (United States)

    Giorgi, E. E.; Vázquez, R. A.; Baume, G. L.; Seggewiss, W.; Feinstein, A.

    Presentamos resultados preliminares basados en análisis fotométricos UBVI para 9 cúmulos abiertos ubicados en la zona de Vela-Puppis (α =7h58m y 9h54m, δ =- 28o a -59o) sobre un total de 15 cúmulos previstos. Estos cúmulos no han sido observados previamente, excepto en algunos pocos casos que se cuenta con fotometría y espectroscospía de algunas estrellas. Se han determinado membrecias, excesos de color, distancias y edades. En el futuro, la muestra global permitirá definir mas claramente este brazo y será utilizada para estudiar las funciones iniciales de masa individuales e integradas y compararlas con las obtenidas en observaciones intensivas realizadas en otras zonas de la Galaxia.

  15. [Unamuno con su nieto Miguel de Unamuno en brazos

    OpenAIRE

    Anónimo

    2010-01-01

    1 fot.; papel. - Retrato. Unamuno de pie con su nieto Miguel de Unamuno Pérez en brazos. (Gelatina D.O.P. brillo.Tarjeta postal con proceso fotográfico. Imagen contrastada con poco detalle en altas luces). - Procedencia: fondo Miguel de Unamuno. - Buena Conservación.

  16. Concordancia entre los porcentajes de grasa corporal estimados mediante el área adiposa del brazo, el pliegue del tríceps y por impedanciometría brazo-brazo

    Directory of Open Access Journals (Sweden)

    Martín Moreno Vicente

    2003-01-01

    Full Text Available Fundamento: La valoración del estado nutricional a partir de los miembros superiores es útil a nivel clínico. El objetivo de este trabajo es analizar el grado de acuerdo entre los porcentajes de grasa corporal (%GC estimados mediante el área adiposa del brazo (%GC BRAZO, la ecuación de Siri para el pliegue del tríceps (%GC TRÍCEPS y por bioimpedanciometría brazo-brazo (%GC BIA, así como con la ecuación de Siri para cuatro pliegues (%GC SIRI. Métodos: Estudio descriptivo transversal. Se valoró antropométricamente y por impedanciometría (Omron BF 300© a 145 personas (83 varones, 62 mujeres. La concordancia entre métodos se analizó mediante el coeficiente de correlación intraclase (CCI y el método de Bland-Altman. Resultados: el CCI entre %GC BRAZO-%GC TRÍCEPS fue de 0,8322 (intervalo de confianza al 95% 0,7672-0,8791; entre %GCB RAZO-%GC BIA de 0,7337 (0,6305-0,8080 y entre %GC TRICEPS-%GC BIA de 0,9290 (0,9015; 0,9488. Con el método de Bland-Altman el intervalo de concordancia entre %GC BRAZO-%GC TRÍCEPS (-11,2; 16,96 y entre %GC BRAZO-%GC BIA (-13,04; 21,76 superó el punto de corte (±10%, pero no entre %G CTRICEPS-%GC BIA (-6,64; 9,6, %GC SIRI-%GC TRÍCEPS (-5,27; 4,52 y %GC SIRI-%GC BIA (-6,31; 8,52. El IMC no influyó en el resultado. Conclusiones: El método utilizado influye en la valoración nutricional realizada a partir de los miembros superiores. El área adiposa del brazo sobreestima el %GC con relación a la ecuación de Siri para el pliegue del tríceps o para cuatro pliegues y a la impedanciometría, y aunque este resultado sugiere que el área adiposa del brazo puede no ser un indicador válido de la adiposidad global, este extremo deberá ser confirmado frente a una técnica patrón.

  17. Multiplicação in vitro de amoreira-preta cultivar Brazos In vitro multiplication of blackberry cv. Brazos

    Directory of Open Access Journals (Sweden)

    Fabiola Villa

    2006-04-01

    Full Text Available A micropropagação da amoreira-preta pode gerar plantas livres de vírus e em curto espaço de tempo. Com o objetivo de aprimorar técnicas de micropropagação de amoreira-preta cultivar Brazos (Rubus idaeus L., segmentos nodais, oriundos de plântulas preestabelecidas in vitro foram excisados e inoculados em meio WPM (0, 50, 100, 150 e 200%, suplementado com diferentes concentrações de BAP (0; 0,5; 1,0; 2,0 e 4,0 mg L-1. Após a inoculação, os explantes foram transferidos para sala de crescimento a 27±1ºC, irradiância de 35 mmol m² s¹ e fotoperíodo de 16 horas, onde permaneceram por 60 dias. O delineamento experimental utilizado foi inteiramente casualizado, utilizando-se de quatro repetições com quatro explantes cada. Maior número de brotos foi proporcionado com 1,0 mg L-1 de BAP associado a 100% de meio WPM e maior comprimento médio dos brotos após 60 dias foi verificado em 1,0 mg L-1 de BAP associado a 200% de meio WPM. Maior peso de matéria seca da parte aérea foi obtido em meio WPM 200% acrescido de 0,5 mg L-1 de BAP.With the objective of multiplying blackberry cv. Brazos, nodal segments, coming from in vitro plants previously selected, were excised and inoculated in WPM culture medium (0, 50, 100, 150 and 200%, supplemented with different concentrations of BAP (0; 0,5; 1,0; 2,0 and 4,0 mg L-1. After inoculation, the explants were transferred to culture room, at 27±1ºC temperature, 35 mmol m² s¹ ofirradiance and photoperiod of 16 hours, for 60 days. The experimental was a design randomized complete block, with four replications and four explants each. Greater number of sprouts was provided with 1,0 mg L-1 of BAP associated with 100% WPM culture medium and larger sprouts length average after 60 days were verified in 1,0 mg L-1 of BAP associated with 200% WPM culture medium. Higher dry matter weight of the aerial part was obtained in 200% WPM culture medium added with 0,5 mg L-1 of BAP.

  18. Concordancia entre los porcentajes de grasa corporal estimados mediante el área adiposa del brazo, el pliegue del tríceps y por impedanciometría brazo-brazo

    Directory of Open Access Journals (Sweden)

    Juan Benito Gómez Gandoy

    2003-01-01

    Full Text Available Fundamento: La valoración del estado nutricional a partir de los miembros superiores es útil a nivel clínico. El objetivo de este trabajo es analizar el grado de acuerdo entre los porcentajes de grasa corporal (%GC estimados mediante el área adiposa del brazo (%GCBRAZO, la ecuación de Siri para el pliegue del tríceps (%GCTRÍ- CEPS y por bioimpedanciometría brazo-brazo (%GCBIA, así como con la ecuación de Siri para cuatro pliegues (%GCSIRI. Métodos: Estudio descriptivo transversal. Se valoró antropométricamente y por impedanciometría (Omron BF 300© a 145 personas (83 varones, 62 mujeres. La concordancia entre métodos se analizó mediante el coeficiente de correlación intraclase (CCI y el método de Bland-Altman. Resultados: el CCI entre %GCBRAZO-%GCTRÍCEPS fue de 0,8322 (intervalo de confianza al 95% 0,7672-0,8791; entre %GCBRAZO- %GCBIA de 0,7337 (0,6305-0,8080 y entre %GCTRICEPS-%GCBIA de 0,9290 (0,9015; 0,9488. Con el método de Bland-Altman el intervalo de concordancia entre %GCBRAZO-%GCTRÍCEPS (-11,2; 16,96 y entre %GCBRAZO-%GCBIA (–13,04; 21,76 superó el punto de corte (±10%, pero no entre %GCTRICEPS-%GCBIA (-6,64; 9,6, %GCSIRI- %GCTRÍCEPS (-5,27; 4,52 y %GCSIRI-%GCBIA (-6,31; 8,52. El IMC no influyó en el resultado. Conclusiones: El método utilizado influye en la valoración nutricional realizada a partir de los miembros superiores. El área adiposa del brazo sobreestima el %GC con relación a la ecuación de Siri para el pliegue del tríceps o para cuatro pliegues y a la impedanciometría, y aunque este resultado sugiere que el área adiposa del brazo puede no ser un indicador válido de la adiposidad global, este extremo deberá ser confirmado frente a una técnica patrón.

  19. Sistema de entrenamiento para un brazo articulado portátil

    OpenAIRE

    García Marín, Alberto

    2012-01-01

    El proyecto está enmarcado dentro del ámbito de la robótica enfocada a la rehabilitación, asistencia y compensación funcional de personas con discapacidades motoras. Se ha querido desarrollar un sistema de entrenamiento en el que el usuario final pueda decidir qué interfaces y configuraciones se adaptan mejor a sus habilidades para controlar el brazo articulado iARM.

  20. Kirubot: brazo robótico ayudante en cirugía

    Directory of Open Access Journals (Sweden)

    Andrés Torres

    2001-04-01

    Full Text Available

    Los objetivos son el diseño y construcción de un prototipo de
    brazo robótico controlado por instrumentación virtual para la realización de procedimientos quirúrgicos, diseñar un sistema de navegación para ubicación de coordenadas en el espacio tridimensional, construir una página WEB del proyecto y desarrollar una línea de aplicaciones de robótica en cirugía.

     

     

  1. Proliferación tumoral en brazo derecho Tumor proliferation in the right arm

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    Martin Sangueza

    2009-07-01

    Full Text Available Se presenta un caso de lesión tumoral de rápido crecimiento en la parte posterior del brazo derecho de una paciente de sexo femenino de 37 años de edad. Son discutidas las características dermatopatológicas e inmuno histoquímicas que determinan el diagnóstico definitivo.It is a case of fast growth tumor lesion on the posterior region of the right arm of a 37-year-old female patient. Dermatopathological and immunohistochemical characteristics are discussed to support the definite diagnosis.

  2. ESTUDIO Y MODELADO DE UN BRAZO ROBÓTICO LEGO DE TRES GRADOS DE LIBERTAD

    OpenAIRE

    JAIME ALBERTO GUZMÁN; ANDRÉS FELIPE GUTIÉRREZ; JUAN D. MEZA

    2011-01-01

    En este artículo se presenta el estudio y modelado de un brazo robótico lego de tres grados de libertad en asocio con sus respectivos modelos de su cinemática directa e inversa junto con una aproximación al análisis dinámico para la generación de trayectorias de este robot. Las ecuaciones que rigen el movimiento son deducidas de los modelos matemáticos propios a las cadenas cinemáticas y son implementadas en el lenguaje de program...

  3. Enraizamento e aclimatização de plantas micropropagadas de amoreira-preta cv. Brazos Rooting and acclimatization of micropropagated plants of blackberry cv. Brazos

    Directory of Open Access Journals (Sweden)

    Carolina Smanhotto Schuchovski Augusto

    2006-12-01

    Full Text Available O presente trabalho estudou as fases finais do processo de micropropagação, incluindo o enraizamento e a posterior aclimatização da amoreira-preta cv. Brazos. Os experimentos foram realizados no Laboratório de Micropropagação de Plantas da UFPR, Curitiba-PR, no período de março de 2000 a julho de 2001. No enraizamento in vitro com ou sem imersão em AIB, obteve-se mais de 95% de enraizamento nos dois tratamentos. No experimento de enraizamento ex vitro, com microestacas provenientes da multiplicação com diferentes citocininas, as taxas de enraizamento e sobrevivência foram de 100%. Na fase final, testou-se a influência da sacarose do meio de cultura de enraizamento in vitro na posterior aclimatização. Em todos os tratamentos, houve 100% de sobrevivência. Conclui-se que pode ser realizado um eficiente enraizamento in vitro sem AIB e sem a adição de sacarose ao meio de cultura, com posterior aclimatização em túnel plástico ou, ainda, realizar o enraizamento ex vitro e aclimatização em casa de vegetação com nebulização intermitente.The present work studied the final stages of blackberry cv. Brazos micropropagation, including rooting and acclimatization. The experiments were carried out in the Plant Micropropagation Laboratory at UFPR, Curitiba-PR, during March 2000 until July 2001. In the in vitro rooting with or without immersion in IBA, the percentage of rooting was higher than 95% in both treatments. In the experiment of ex vitro rooting, with micro-shoots proceeding from the multiplication with different cytokinins, the rooting and survival rates were of 100%. In the final stage it was tested the influence of sucrose of the in vitro rooting media on the acclimatization. All the treatments showed 100% of survival. It can be concluded that an efficient in vitro rooting can be realized without both IBA and sucrose in the culture media with acclimatization under plastic tunnel or ex vitro rooting and acclimatization

  4. ESTUDIO Y MODELADO DE UN BRAZO ROBÓTICO LEGO DE TRES GRADOS DE LIBERTAD

    Directory of Open Access Journals (Sweden)

    JAIME ALBERTO GUZMÁN

    2011-12-01

    Full Text Available En este artículo se presenta el estudio y modelado de un brazo robótico lego de tres grados de libertad en asocio con sus respectivos modelos de su cinemática directa e inversa junto con una aproximación al análisis dinámico para la generación de trayectorias de este robot. Las ecuaciones que rigen el movimiento son deducidas de los modelos matemáticos propios a las cadenas cinemáticas y son implementadas en el lenguaje de programación Java y ejecutadas por el robot a través de la extensión Java -LeJOS.

  5. Analysis of Potential Future Climate and Climate Extremes in the Brazos Headwaters Basin, Texas

    Directory of Open Access Journals (Sweden)

    Ripendra Awal

    2016-12-01

    Full Text Available Texas’ fast-growing economy and population, coupled with cycles of droughts due to climate change, are creating an insatiable demand for water and an increasing need to understand the potential impacts of future climates and climate extremes on the state’s water resources. The objective of this study was to determine potential future climates and climate extremes; and to assess spatial and temporal changes in precipitation (Prec, and minimum and maximum temperature (Tmin and Tmax, respectively, in the Brazos Headwaters Basin under three greenhouse gas emissions scenarios (A2, A1B, and B1 for three future periods: 2020s (2011–2030, 2055s (2046–2065, and 2090s (2080–2099. Daily gridded climate data obtained from Climate Forecast System Reanalysis (CFSR were used to downscale outputs from 15 General Circulation Models (GCMs using the Long Ashton Research Station–Weather Generator (LARS-WG model. Results indicate that basin average Tmin and Tmax will increase; however, annual precipitation will decrease for all periods. Annual precipitation will decrease by up to 5.2% and 6.8% in the 2055s and 2090s, respectively. However, in some locations in the basin, up to a 14% decrease in precipitation is projected in the 2090s under the A2 (high emissions scenario. Overall, the northwestern and southern part of the Brazos Headwaters Basin will experience greater decreases in precipitation. Moreover, precipitation indices of the number of wet days (prec ≥ 5 mm and heavy precipitation days (prec ≥ 10 mm are projected to slightly decrease for all future periods. On the other hand, Tmin and Tmax will increase by 2 and 3 °C on average in the 2055s and 2090s, respectively. Mostly, projected increases in Tmin and Tmax will be in the upper range in the southern and southeastern part of the basin. Temperature indices of frost (Tmin < 0 °C and ice days (Tmax < 0 °C are projected to decrease, while tropical nights (Tmin > 20 °C and summer days (Tmax

  6. Control de brazo electrónico usando señales electromiográficas

    Directory of Open Access Journals (Sweden)

    Jorge Andrés García-Pinzón

    2015-05-01

    Full Text Available Los trabajos enfocados en la extracción de patrones en señales electromiográficas (SEMG han venido creciendo debido a sus múltiples aplicaciones. En este artículo se presenta una aplicación en la cual se implementa un sistema electrónico para el registro de las SEMG de la extremidad superior en un sujeto, con el fin de controlar de forma remota un brazo electrónico. Se realizó una etapa de preprocesamiento de las señales registradas, para eliminar información poco relevante, y reconocimiento de zonas de interés; enseguida se extraen los patrones y se clasifican. Las técnicas utilizadas fueron: análisis wavelet (AW, análisis de componentes principales (ACP, transformada de fourier (TF, transformada del coseno discreta (TDC, energía, máquinas de soporte vectorial (MSV o SVM y redes neuronales (RNA. En este artículo se demuestra que la metodología planteada permite realizar un proceso de clasificación con un rendimiento superior al 95%. Se registraron más de 4000 señales.

  7. Controlador basado en variables de estado para un Brazo de dos grados de libertad.

    Directory of Open Access Journals (Sweden)

    Edgar Andrés Gutiérrez Cáceres

    2011-05-01

    Full Text Available Este artículo pretende hacer que el control de un brazo robótico con dos grados de libertad, se muestra todas las medidas para analizar el sistema de control y trabajar con variables de estado a partir de las ecuaciones describe el sistema. Inicialmente las ecuaciones son expresadas por una reducción o cambio de orden variable, a continuación, se procede a crear las matrices de variables de estado y, finalmente, determina si el sistema es controlable y observable, para simular en Simulink y luego determinar el comportamiento según el controlador aquí diseñado. Se muestra el continuo mejoramiento y la preocupación por las nuevas técnicas de análisis y sistemas elec trónicos, el grupo VITAL SIGNAL & CONTROL a tomado la iniciativa de utilizar técnicas de procesamiento y dar a conocer sus primeros avances.

  8. Movimiento del brazo humano: de los tres planos a las tres dimensiones

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    Carlos F Rodríguez

    2005-11-01

    Full Text Available La representación clásica de movimiento de la extremidad superior es muy adecuada para describir movimientos individuales que se realizan en planos, pero presenta algunas incoherencias cuando se intentan describir movimientos tridimensionales relativamente complejos. En este trabajo se propone una modificación de la representación de movimientos del brazo humano, especialmente útil para el reporte de resultados de laboratorios de análisis computarizado de movimiento. La representación propuesta tiene dos ventajas: es robusta en el sentido de unicidad y permite describir movimientos tridimensionales a través de gráficas de uso común para los profesionales de la salud. / The classic upper limb motion representation is appropriate for describe individual motions performed in planes, but it has incoherencies when it's used for description of three-dimensional complex movements. In this work a modification for the motion representation of the upper limb is presented. This representation is especially useful for the report of results in computerized motion analysis laboratories. The proposed representation has two advantages: it is robust in the sense of unicity and it allows description of three-dimensional motion graphically in a familiar way for health professionals.

  9. O impacto da osteoporose no Brasil: dados regionais das fraturas em homens e mulheres adultos - The Brazilian Osteoporosis Study (BRAZOS) The burden of osteoporosis in Brazil: regional data from fractures in adult men and women - The Brazilian Osteoporosis Study (BRAZOS)

    OpenAIRE

    Pinheiro, Marcelo M; Rozana M Ciconelli; Natielen de O Jacques; GENARO, Patrícia S; Martini, Lígia A; Marcos B Ferraz

    2010-01-01

    INTRODUÇÃO/OBJETIVOS: O BRAZOS (The Brazilian Osteoporosis Study) é um estudo epidemiológico, de base populacional, realizado em amostra representativa de mulheres e homens brasileiros, de idade superior a 40 anos, com o objetivo de identificar os principais fatores clínicos de risco associados com fratura por baixo impacto. Nesse artigo são apresentados os principais resultados do estudo, de acordo com cada região do país. PACIENTES E MÉTODOS: Um total de 2.420 indivíduos, provenientes das c...

  10. Colgajo lateral de brazo en reconstrucción de la cavidad oral Lateral arm flap in oral cavity reconstruction

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    A. Dean Ferrer

    2008-08-01

    Full Text Available Introducción. La posibilidad de emplear una piel fácilmente plegable ha permitido reconstruir defectos de la cavidad oral consiguiendo una gran funcionalidad. Aunque el colgajo radial es el colgajo que se utiliza con más frecuencia para reconstruir defectos de superficie de la cavidad oral, el colgajo lateral de brazo puede ser de elección en algunas situaciones. Objetivos. El objetivo del presente trabajo es mostrar las ventajas e inconvenientes y nuestras indicaciones y resultados del colgajo lateral de brazo en reconstrucción de defectos de la cavidad oral. Material y método. Se trata de un estudio prospectivo sobre la utilización del colgajo lateral de brazo en la reconstrucción de defectos de la cavidad oral tras cirugía ablativa. Se ha valorado: la viabilidad del colgajo, la morbilidad del lecho donante, la longitud del pedículo, la selección de vasos receptores, las complicaciones y los resultados funcionales de la zona reconstruida. Resultados. Hemos utilizado el colgajo lateral de brazo en 10 pacientes en reconstrucciones primarias tras cirugía ablativa por carcinoma epidermoide de la cavidad oral. Hubo un caso de necrosis por trombosis venosa. El defecto donante se cerró en 8 casos de modo directo y en 2 con un injerto libre de espesor parcial. La longitud media del pedículo ha sido de 8,75 cm. En 9 casos el resultado funcional de los pacientes ha sido satisfactorio. Conclusiones. El colgajo fasciocutáneo lateral de brazo permite la reconstrucción de la cavidad oral consiguiendo buenos resultados funcionales. Además la morbilidad de la zona donante es mínima y puede realizarse cierre directo del defecto cutáneo del brazo en la mayoría de los casos.Introduction. The availability of easily pliable skin has allowed the functional reconstruction of oral cavity defects. Although the radial forearm free flap is the most frequently used flap for the reconstruction of surface defects of the oral cavity, the lateral arm free

  11. ADQUISICIÓN Y PROCESAMIENTO DE SEÑALES EMG PARA CONTROLAR MOVIMIENTO DE UN BRAZO HIDRAULICO

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    Jorge Andrés García Pinzon

    2014-06-01

    Full Text Available En este artículo se presenta el diseño e implementación de un sistema electrónico para el registro de las señales electromiográficas de la extremidad superior del sujeto (humano. Seguidamente al proceso de la implementación del sistema electrónico, en este trabajo se realiza una etapa de pre-procesamiento y procesamiento de las señales registradas, las técnicas utilizadas para éste fin son: análisis wavelet (AW, análisis de componentes principales (ACP, transformada de fourier (TF, transformada del coseno discreta (DCT, máquinas de soporte vectorial (SVM y redes neuronales artificiales (RNA; estas técnicas se usaron para eliminar información poco relevante, reconocer zonas de interés, extraer patrones en cada grupo de señales y clasificar una nueva señal que controle en forma precisa el movimiento que quiere ejecutar el sujeto con el brazo Hidráulico. Dentro de las técnicas de control de procesos Industriales se busca realizar una aplicación con el fin de poder hacer control a dos grados de libertad más el efector final del brazo hidráulico del laboratorio de automatización y mantenimiento de equipos industriales de la Universidad de Pamplona.

  12. 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.

  13. Deleción terminal del brazo largo del cromosoma 9 en Leucemia promielocítica aguda

    OpenAIRE

    2001-01-01

    La Leucemia Promielocítica Aguda (LPA), definida como M3 en la clasificación francesa-americana- británica (FAB)(1), se caracteriza por presentar una translocación cromosómica al azar t(15;17)(q22;q21). En esta translocación se fusionan los receptores del ácido retinoíco ?(? RAR) gen localizado en el cromosoma 17 y el gen PML sobre el cromosoma 15(2). Por otra lado, la deleción del brazo largo del cromosoma 9(9q-) es una alteración rara específica encontrada en (LMA) como una anormalidad únic...

  14. Technical analysis of a river basin-based model of advanced power plant cooling technologies for mitigating water management challenges

    Energy Technology Data Exchange (ETDEWEB)

    Stillwell, Ashlynn S [Department of Civil, Architectural, and Environmental Engineering, University of Texas at Austin, 1 University Station C1786, Austin, TX 78712 (United States); Clayton, Mary E; Webber, Michael E, E-mail: ashlynn.stillwell@mail.utexas.edu, E-mail: mclayton34@mail.utexas.edu, E-mail: webber@mail.utexas.edu [Department of Mechanical Engineering, University of Texas at Austin, 1 University Station C2200, Austin, TX 78712 (United States)

    2011-07-15

    Thermoelectric power plants require large volumes of water for cooling, which can introduce drought vulnerability and compete with other water needs. Alternative cooling technologies, such as cooling towers and hybrid wet-dry or dry cooling, present opportunities to reduce water diversions. This case study uses a custom, geographically resolved river basin-based model for eleven river basins in the state of Texas (the Brazos and San Jacinto-Brazos, Colorado and Colorado-Brazos, Cypress, Neches, Nueces, Red, Sabine, San Jacinto, and Trinity River basins), focusing on the Brazos River basin, to analyze water availability during drought. We utilized two existing water availability models for our analysis: (1) the full execution of water rights-a scenario where each water rights holder diverts the full permitted volume with zero return flow, and (2) current conditions-a scenario reflecting actual diversions with associated return flows. Our model results show that switching the cooling technologies at power plants in the eleven analyzed river basins to less water-intensive alternative designs can potentially reduce annual water diversions by 247-703 million m{sup 3}-enough water for 1.3-3.6 million people annually. We consider these results in a geographic context using geographic information system tools and then analyze volume reliability, which is a policymaker's metric that indicates the percentage of total demand actually supplied over a given period. This geographic and volume reliability analysis serves as a measure of drought susceptibility in response to changes in thermoelectric cooling technologies. While these water diversion savings do not alleviate all reliability concerns, the additional streamflow from the use of dry cooling alleviates drought concerns for some municipal water rights holders and might also be sufficient to uphold instream flow requirements for important bays and estuaries on the Texas Gulf coast.

  15. Risk factors for recurrent falls among Brazilian women and men: the Brazilian Osteoporosis Study (BRAZOS Fatores de risco para quedas recorrentes entre mulheres e homens brasileiros: o Estudo Brasileiro sobre Osteoporose (BRAZOS

    Directory of Open Access Journals (Sweden)

    Marcelo de Medeiros Pinheiro

    2010-01-01

    Full Text Available The objective of the study was to estimate the frequency of recurrent falls and identify the main associated risk factors. The BRAZOS is the first epidemiological study performed on a representative sample of the Brazilian population. Anthropometric data, living habits, previous fractures, falls, dietary intake, physical activity and quality of life were evaluated in 2,420 individuals aged 40 and older. Recurrent falls were reported by 15.5% of men and 25.6% of women. Among women, the risk factors significantly associated to recurrent falls were age, previous fracture, sedentary lifestyle, poor quality of life, diabetes mellitus and current use of benzodiazepine. In men, the risk factors were age, poor quality of life, intake of alcoholic beverages, diabetes mellitus, previous fracture and use of benzodiazepine. A greater intake of vitamin D had a protector effect on the risk of recurrent falls. These findings demonstrated the high prevalence of recurrent falls and emphasize that a multidisciplinary approach is necessary to minimize recurrent falls and their consequences, including osteoporotic fractures.Estimar a freqüência de quedas recorrentes e identificar os principais fatores de risco associados. O BRAZOS é o primeiro estudo epidemiológico realizado em amostragem representativa da população brasileira. Dados antropométricos, hábitos de vida, fratura prévia, quedas, dieta, atividade física e qualidade de vida foram avaliados em 2.420 indivíduos adultos. Quedas recorrentes foram referidas por 15,5% dos homens e 25,6% das mulheres. Nas mulheres, os fatores de risco associados com quedas recorrentes foram idade, fratura prévia, sedentarismo, pior qualidade de vida, diabete mellitus e uso atual de benzodiazepínicos. Nos homens, foram idade, pior qualidade de vida, consumo de bebidas alcoólicas, diabete mellitus, fratura prévia e uso atual de benzodiazepínicos. Maior ingestão de vitamina D desempenhou efeito protetor sobre o

  16. O impacto da osteoporose no Brasil: dados regionais das fraturas em homens e mulheres adultos - The Brazilian Osteoporosis Study (BRAZOS The burden of osteoporosis in Brazil: regional data from fractures in adult men and women - The Brazilian Osteoporosis Study (BRAZOS

    Directory of Open Access Journals (Sweden)

    Marcelo M Pinheiro

    2010-04-01

    Full Text Available INTRODUÇÃO/OBJETIVOS: O BRAZOS (The Brazilian Osteoporosis Study é um estudo epidemiológico, de base populacional, realizado em amostra representativa de mulheres e homens brasileiros, de idade superior a 40 anos, com o objetivo de identificar os principais fatores clínicos de risco associados com fratura por baixo impacto. Nesse artigo são apresentados os principais resultados do estudo, de acordo com cada região do país. PACIENTES E MÉTODOS: Um total de 2.420 indivíduos, provenientes das cinco regiões do país e de todas as classes socioeconômicas foram incluídos no estudo. Foram avaliados dados antropométricos, bem como aspectos relacionados aos hábitos de vida, fraturas, ingestão alimentar, atividade física, quedas e qualidade de vida por meio de entrevista individual e quantitativa. Fratura por baixo impacto foi definida como aquela decorrente de queda da própria altura ou menos. Valor de P OBJECTIVES: The BRAZOS (The Brazilian Osteoporosis Study study is the first epidemiological and population-based study carried out in a representative sample of Brazilian men and women, 40 years or older, with the objective of identifying the prevalence and main clinical risk factors (CRF associated with low-impact fractures. This report shows the main results according to each region of the country. PATIENTS AND METHODS: A total of 2,420 subjects (70% women from 150 different cities in five geographic regions in Brazil, and from all different socio-economical classes were included in this study. Anthropometrical data, as well life style, previous fractures, nutritional status, physical activity, falls, and quality of life were evaluated by a quantitative individual survey. Low-impact fracture was defined as that resulting from a fall no greater than standing height of an individual. A P < 0.05 was considered significant. RESULTS: Statistically significant differences in the prevalence of fractures among the five Brazilian regions

  17. Deleción terminal del brazo largo del cromosoma 9 en Leucemia promielocítica aguda

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    Herrera JC.

    2001-06-01

    Full Text Available La Leucemia Promielocítica Aguda (LPA, definida como M3 en la clasificación francesa-americana- británica (FAB(1, se caracteriza por presentar una translocación cromosómica al azar t(15;17(q22;q21. En esta translocación se fusionan los receptores del ácido retinoíco ?(? RAR gen localizado en el cromosoma 17 y el gen PML sobre el cromosoma 15(2. Por otra lado, la deleción del brazo largo del cromosoma 9(9q- es una alteración rara específica encontrada en (LMA como una anormalidad única del cariotipo o como un cambio secundario, particularmente junto con t(8;21(q22;q22(3,4. La mayoría de ellas son deleciones intersticiales, 9q12 y 9q22; constituyen el sitio más común de ruptura proximal y distal (5.

  18. 49 CFR Appendix B to Part 194 - High Volume Areas

    Science.gov (United States)

    2010-10-01

    ... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PIPELINE SAFETY RESPONSE PLANS FOR ONSHORE OIL PIPELINES... Akron, AL. Brazos River Glen Rose, TX. Brazos River Sealy, TX. Catawba River Mount Holly,...

  19. Un protector laminado de brazo (manica procedente del campamento de la legio VII Gemina en León

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    Aurrecoechea, Joaquín

    2008-12-01

    Full Text Available At the archaeological excavations carried out during 1998 in Santa Marina street, near the internal face of the Late Roman wall of Leon, an important building of the legio VII gemina fortress was discovered. It was identified as a magazine with a central courtyard, erected by this legionary unit at the end of the 1st c. AD. Inside one of the constructions a fragment of a manica or a laminated arm protector was found. This element consists of 11 overlapping plates of different sizes, four of them trapezoid and seven rectangular and of greater size. Some fragments were preserved, which could have been leather. This ensemble became deformed by crushing. This protector was abandoned around the last quarter of the 3rd c. AD in a room which was possibly a storage area and was crushed by the collapse of the roof of the building.Las excavaciones arqueológicas desarrolladas durante 1998 en un solar de la calle Santa Marina, inmediato a la cara interna de la muralla bajoimperial de León, revelaron un gran edificio perteneciente al campamento de la legio VII gemina, que ha sido identificado como un almacén con patio central, levantado a finales del siglo I d. C. En el interior de una de las estancias se encontró un fragmento de manica o protector laminado de brazo. Este elemento está constituido por 11 láminas imbricadas de distinto tamaño, cuatro trapezoidales y siete rectangulares de mayor tamaño. Se conservan algunos restos de lo que pudiera ser cuero. Este conjunto se encuentra deformado por aplastamiento. El protector fue abandonado hacia el último cuarto del siglo III d. C. en una estancia destinada posiblemente a almacenamiento y quedó aplastado por el derrumbe del techo del edificio.

  20. Tetralogía de Fallot asociada a duplicación distal del brazo largo del cromosoma 11

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    Elodia Torres

    2015-04-01

    Full Text Available La tetralogía de Fallot es una cardiopatía frecuente y puede representar hasta el 11 al 13% de todas las cardiopatías congénitas clínicas, se presenta en 1 de cada 8.500 nacidos vivos. En la mayoría de los casos, se asocia a una microdeleción del cromosoma 22 y con menor frecuencia al síndrome de Down. El síndrome de la dup 11q es una anomalía cromosómica causada por la duplicación de la porción distal del extremo del brazo largo del cromosoma 11, ocasionando una trisomía parcial del mismo, producto de un desbalance cromosómico, con disfunción de los genes involucrados en este material genético adicional que ocasiona anormalidades tanto físicas como mentales en un recién nacido. Se presenta el caso de un niño de 3 meses de vida que es derivado a la consulta genética por fenotipo sindromático, Tetralogía de Fallot y retraso del crecimiento. El estudio citogenético se realizó en sangre periférica, los cromosomas fueron procesados con técnicas de tinción convencional, bandas de alta resolución y centroméricas, observándose una duplicación 11q. Cariotipo: 46, XY, dup11 (q23àqter. Se enfatiza la importancia del estudio cromosómico en recién nacidos con malformaciones congénitas mayores para el diagnóstico de certeza y posterior asesoramiento genético a los progenitores.

  1. Inmunogenicidad de conjugados de polisacárido de Neisseria meningitidis serogrupo C unido al toxoide tetánico por diferentes brazos espaciadores

    Directory of Open Access Journals (Sweden)

    Osmir Cabrera

    2005-01-01

    Full Text Available El desarrollo de las vacunas conjugadas compuestas por polisacáridos unidos covalentemente a proteínas contra Haemophilus influenzae type b, han demostrado ser eficaces en infantes, lo que condujo al desarrollo activo de las vacunas conjugadas contra otros microorganismos por varios grupos de investigaci ón. La influencia en la respuesta inmune de la estructura de los brazos espaciadores utilizados en conjugados de polisacárido de N. meningitidis serogrupo C (PMGC-toxoide tetánico (TT fue evaluado en ratones Balb/c. Se determin ó la generación de anticuerpos IgG anti-PMGC e IgG anti-TT en los sueros de los animales inoculados por medio de un ELISA indirecto. También se evaluaron las subclases de anticuerpos IgG1 e IgG2a anti PMGC. El 1,6-diaminohexano (AH, el 1,8-diaminooctano (AO, el ácido 6-aminohexanoico (AA y la dihidrazida del ácido adípico (ADH, fueron utilizados como brazos espaciadores con diferentes estructuras químicas, unidos al PMGC y al TT por medio de la reacción con carbodiimida. El suero de todos los ratones que fueron inoculados con los conjugados presentaron elevados títulos de IgG anti-PMGC y los valores más elevados se encontraron en los sueros de animales inoculados con el conjugado en los que se utilizó al ADH como brazo espaciador. En los grupos de animales inmunizados con los conjugados que utilizaron al AO y al ADH se detectaron títulos de IgG2a superiores a los detectados para el PMGC no conjugado; se observaron los títulos de IgG2a más elevados en los sueros de ratones inmunizados con conjugados con ADH. Las concentraciones de anticuerpos IgG anti-TT observados en los sueros de los ratones inmunizados con los conjugados fueron más elevados que los determinados en el suero de animales inmunizados con el TT. Se concluyó que la respuesta inmune obtenida en los ratones después de ser inoculados con los conjugados varía en dependencia del brazo del espaciador utilizado, siendo más elevada cuando se

  2. Dimensionamiento de un brazo robótico de dos grados de libertad para registro de imágenes en un invernadero

    Directory of Open Access Journals (Sweden)

    Álvaro Llamas González

    2004-01-01

    Full Text Available La agricultura de invernadero requiere un manejo de información relacionada con el control de las condiciones ambientales interiores, las cuales deben mantenerse en rangos aceptables para propiciar un desarrollo óptimo de los cultivos. Para determinar en tiempo real el estado de desarrollo de las plantas, se requiere monitorear un conjunto de variables. Mucha de la información necesaria se puede obtener a partir de las imágenes de las plantas, individuales y en conjunto. El análisis de estas imágenes proporciona información sobre cuestiones tales como el estado nutricional del cultivo, estado sanitario y desarrollo general del mismo. Para registrar estas imágenes de manera continua, se contempla el desarrollo de un robot equipado con una cámara de video que pueda desplazarse dentro del invernadero. Las imágenes serán transmitidas a una computadora que se encargará de procesarlas. En este trabajo se presentan los cálculos de síntesis cinemática del brazo del robot cuya función es llevar la cámara de video a cualquier posición conveniente para el registro de las imágenes. Se trata de un brazo de dos grados de libertad.

  3. Blackberry (Rubus spp.: influence of ripening and processing on levels of phenolic compounds and antioxidant activity of the 'Brazos' and 'Tupy' varieties grown in Brazil

    Directory of Open Access Journals (Sweden)

    Acácio Antonio Ferreira Zielinski

    2015-04-01

    Full Text Available Fruits from temperate and tropical climates which have high levels of antioxidant compounds are the source of numerous studies concerning the correlation with benefits to human health. The objectives of this study were to quantify the anthocyanins and phenolic compounds and also to measure the antioxidant activity (ferric reducing antioxidant power - FRAP of blackberries from two varieties grown in southern Brazil ('Brazos' and 'Tupy' at three stages of ripening; unripe, semi-ripe, ripe and their products (pulp and fermented products. During fruit ripening it was observed that weight, size, diameter and sugars increase significantly and acidity decreased significantly. The anthocyanin content ranged from 4.19 (semi-ripe 'Tupy' variety to 205.75mg 100g-1 (ripe 'Brazos' variety. The highest levels of phenolic compounds were observed for the unripe fruit of both varieties, while antioxidant activity showed no significant difference during the ripening stages. The studied pulp showed a high content of phenolic compounds (ten times higher than that found in the ripe fruits. The anthocyanin content and antioxidant activity did not show the same increase due to the degradation of anthocyanins caused by the heat treatment that was used. The alcoholic fermented beverage made from blackberries remained stable (total phenolic compounds and antioxidant activity during two years of storage, but the in third year a significant reduction in antioxidant activity was observed. These results can be important for establishing the shelf life of this kind of product made with blackberry

  4. El índice tobillo-brazo como predictor de mortalidad vascular Ankle brachial index as indicator for vascular mortality

    Directory of Open Access Journals (Sweden)

    Juan José Arévalo Manso

    2012-06-01

    Full Text Available El índice tobillo-brazo (ITB es un parámetro que muestra la relación entre la tensión arterial sistólica de la extremidad superior y la extremidad inferior. Este indicador, ampliamente estudiado y presente en la bibliografía, se ha mostrado como excelente predictor de mortalidad tanto vascular como por causas generales cuando presenta valores fuera del rango establecido como normal (0,90-1,30. En dichas situaciones la utilidad del ITB reside en detectar precozmente la existencia de enfermedad arterial periférica (EAP durante su fase asintomática y servir como parámetro de corte para el establecimiento de medidas preventivas más contundentes antes de que el daño vascular existente se haga sintomático. Para el profesional de enfermería este parámetro constituye una potente herramienta de valoración, objetiva y cuantitativa, que permite seleccionar aquellos pacientes en los que es preciso potenciar al máximo los cuidados preventivos.The ankle-brachial index (ABI is a simple test showing the relationship between systolic blood pressure in the upper and the lower limbs. This parameter widely studied in literature has been reported as an excellent vascular and all-cause death predictor when exceeds the normal values (0.90-1.30. In such situation the ABI can early detect periferic arterial disease (PAD in asymptomatic phase and be a cutoff parameter to consider more aggressive preventive interventions before the existing vascular damage becomes symptomatic. This test is a powerful assessment tool for nurses to select those patients needing to maximize preventive cares. The nursing staff training for ABI measurement, the provision of suitable equipment by the Health Institutions and the development of reliable and more simple measurement methods are key issues that would facilitate its routinely and systematically use to improve the preventive strategy in vascular diseases.

  5. Aquilla Lake, Brazos River Basin, Texas, Pre-Impoundment Environmental Study: Supplement to Design Memorandum Number 9, Master Plan (in Response to: 40CFR 1505.3),

    Science.gov (United States)

    1983-06-01

    dandelion was dominant, but sow thistle (Sonchus asper), and goldenrod were becoming established. Japanese brome ( Bromus japonicus) snd Johnson grass ...Sorghum halepense Japanese Brome Bromus japonicus Dallisgrass Paspalum dilatatun Downy Brome Bromus tectorum Scribner’s Dichanthelium Dichanthelium...back to the ground each year. Grasses and forbs, annuals or perennials (Hanson 1962). The vegetation complexity required 2 sampling methods - canopy

  6. A Preliminary Assessment of the Cultural Resources within the Millican Project, Navasota River Basin, Brazos, Grimes, Leon, Madison and Robertson Counties, Texas. Reports of Investigations, Number 19.

    Science.gov (United States)

    1982-02-01

    SPANISH SETTLEMENT IN THE VICINITY OF THE PROJECT AREA Pilar de Bucareli , a settlement for exiles from Los Adais Mission near Natchitoches, Louisiana was...believed to have been located near Robbin’s Ferry at Randolph in Madison County (Bolton 1970:406). Bucareli was established to help the Spanish in at least...Gulf of Mexico (Bolton 1970:407). Not all of these well-intentioned goals were realized. Bucareli was populated and remained in existence under the

  7. Efecto del pedaleo de brazos sobre el sistema cardiorrespiratorio de las personas con tetraplejia. (Effect of armcrank pedaling on the cardiorespiratory system of the people with tetraplegia.

    Directory of Open Access Journals (Sweden)

    Gabriel Brizuela Costa

    2010-10-01

    Full Text Available Resumen Objetivos: Determinar el efecto de un programa de entrenamiento de pedaleo de brazos (PB estacionario, sobre el sistema cardiorrespiratorio de personas con tetraplejia. Método: Se estudiaron 11 participantes con tetraplejia por lesión medular (LM de origen traumático a niveles entre C4 y C6. Se midieron variables espirométricas (VC, FVC y MVV y de Variabilidad de la Frecuencia Cardíaca VFC (HR, STDHR, RMSSD, LF, HF y HRVPOWER, antes y después de 8 semanas de entrenamiento. Resultados: Todas las variables mostraron cambios significativos (p Abstract Objective: The aim of the study was to determine the effect, in subjects with tetraplejia, of a stationary armcrank pedaling (AP training program on their cardiorespiratory system. Method: 11 participants with tetraplegia, originated by traumatic spinal cord injury (SCI at levels between C4 and C6, were included in the study. Spirometric (VC, FVC and MVV and Heart Rate Variability (HRV indices (HR, STDHR, RMSSD, LF, HF, HRVPOWER were measured before and after an 8 weeks of armcrank pedaling training program. Results: Spirometric and HRV variables showed changes (p

  8. Caracterización del basamento metamórfico en el extremo oriental del Brazo Huemul, provincia de Neuquén

    Directory of Open Access Journals (Sweden)

    M.F. Gargiulo

    2006-09-01

    Full Text Available El objetivo de este trabajo es caracterizar los afloramientos del basamento metamórfico situados en el extremo oriental del Brazo Huemul del lago Nahuel Huapi. En este sector se describe por primera vez su litología en detalle, su estructura y metamorfismo. Se los clasifica como paragneises protomiloníticos y se los asigna al Complejo Colohuincul. Su estructura está principalmente representada por una faja de cizalla frágil-dúctil cuya orientación más importante es en sentido N14°O coincidiendo con lineamientos regionales del área. Si bien no se han realizado estudios cinemáticos de dicha faja, de acuerdo con las relaciones observadas en el campo entre las diferentes unidades, se la ha interpretado como una zona de falla inversa de alto ángulo (74° al SO, que pone en contacto tectónico a las rocas del basamento metamórfico con las rocas volcánicas/volcaniclásticas de la Formación Ventana. De acuerdo a la asociación de minerales presente (cuarzo - clorita - biotita - granate (almandino? - albita fue posible determinar un protolito sedimentario pelítico sometido a metamorfismo regional en condiciones correspondientes a la facies de esquistos verdes de alta temperatura (zona de biotita-granate.

  9. Clumped Isotope Verification of δ18O-Based Freshwater Mussel Shell Growth Chronology for a High-Resolution Climate and River Discharge Record

    Science.gov (United States)

    VanPlantinga, A.; Grossman, E. L.; Passey, B. H.; Randklev, C.

    2015-12-01

    Isotope profiles in freshwater mussel shells can be used to reconstruct climate, water source, and river discharge, but problems arise from variable water temperature and δ18O. To resolve this complexity and expand the application of isotope sclerochronology to the study of past river systems, we measured δ18O and Δ47 in two common freshwater mussel species from the Brazos River in Texas. To compare the environmental record with the shell record and develop a sclerochronology, weekly water temperature and δ18O data were collected from the Brazos River near College Station from January 2012 to August 2013. The river data reveal complex, irregular patterns for predicted aragonite δ18O. Comparing δ18O profiles from micromilled transects (70-200 µm increments) of coeval shell growth within and between shells yielded consistent patterns. Shell δ18O can be accurately matched to predicted δ18O, providing a chronology of shell growth. However, without a water temperature and δ18O record, interpreting a sclerochronology would be impossible. Shell Δ47 can potentially provide a seasonal chronology to verify the δ18O sclerochronology, which would be invaluable for the use of δ18O sclerochronology in historical and ancient shells. For Δ47 analyses, samples were taken at 0.5 mm resolution in presumed seasonal dark and light growth bands. Clumped temperatures range between 21 and 35 ± 4˚C (Henkes et al., 2013) and track the river temperature record, supporting the interpreted shell δ18O chronology. Shell Δ47-calculated water δ18O values range from -1.2 to 1.5 ± 0.9‰ and match river δ18O. High-resolution shell δ18O profiles combined with Δ47 temperatures can reconstruct a weekly history of water δ18O, and with the observed river discharge vs. water δ18O relation, produce a qualitative record of river discharge. These analytical techniques applied to a historical Brazos River mussel shell collected prior to dam construction reveal weekly records of

  10. Facies metamórficas y edades relativas de las rocas del extremo oriental del Brazo Huemul, provincia de Neuquén

    Directory of Open Access Journals (Sweden)

    M.F. Gargiulo

    2006-06-01

    Full Text Available El estudio de las asociaciones minerales y facies metamórficas presentes en las rocas del extremo oriental del Brazo Huemul del lago Nahuel Huapi permitió establecer la sucesión temporal de aquellas unidades cuyos afloramientos son saltuarios, principalmente debido a la exuberante cubierta vegetal que caracteriza a este sector situado en el extremo sur de la provincia de Neuquén. En el área de estudio afloran rocas de composición principalmente tonalítica, que en este trabajo se correlaciona con el batolito patagónico Subcordillerano debido a que están atravesadas por dos tipos de diques básicos. Un grupo de estos diques está caracterizado por la asociación albita - clorita - epidoto - cummingtonita/grunerita - hornblenda, que indica condiciones de metamorfismo térmico transicional entre la facies de hornfels de albita - epidoto hacia la facies de hornfels de hornblenda, metamorfismo originado por la intrusión del Batolito Patagónico Cordillerano de edad cretácica. Motivo por lo cual estos diques han sido correlacionados con la Formación Montes de Oca. Los diques básicos correspondientes al otro tipo no están hornfelizados pero muestran asociaciones de metamorfismo de muy bajo grado en facies zeolita de alta temperatura (clorita + pumpellyita + laumontita + clorita/esmectita + óxidos de hierro y/o poseen alteración propilítica, por lo cual fueron asignados a la F. Ventana. La distinción entre estos dos tipos de diques permite poner en discusión la edad relativa del cuerpo tonalítico que los hospeda, proponiéndose en este trabajo una edad relativa jurásica inferior a media para el mismo.

  11. Long-term trend analysis of reservoir water quality and quantity at the landscape scale in two major river basins of Texas, USA.

    Science.gov (United States)

    Patino, Reynaldo; Asquith, William H.; VanLandeghem, Matthew M.; Dawson, D.

    2016-01-01

    Trends in water quality and quantity were assessed for 11 major reservoirs of the Brazos and Colorado river basins in the southern Great Plains (maximum period of record, 1965–2010). Water quality, major contributing-stream inflow, storage, local precipitation, and basin-wide total water withdrawals were analyzed. Inflow and storage decreased and total phosphorus increased in most reservoirs. The overall, warmest-, or coldest-monthly temperatures increased in 7 reservoirs, decreased in 1 reservoir, and did not significantly change in 3 reservoirs. The most common monotonic trend in salinity-related variables (specific conductance, chloride, sulfate) was one of no change, and when significant change occurred, it was inconsistent among reservoirs. No significant change was detected in monthly sums of local precipitation. Annual water withdrawals increased in both basins, but the increase was significant (P water quality data due to the presence of high- and low-salinity reservoirs in both basins. These observations present a landscape in the Brazos and Colorado river basins where, in the last ∼40 years, reservoir inflow and storage generally decreased, eutrophication generally increased, and water temperature generally increased in at least 1 of 3 temperature indicators evaluated. Because local precipitation remained generally stable, observed reductions in reservoir inflow and storage during the study period may be attributable to other proximate factors, including increased water withdrawals (at least in the Colorado River basin) or decreased runoff from contributing watersheds.

  12. DISEÑO E IMPLEMENTACIÓN DE UN PROTOTIPO DE BRAZO ROBÓTICO EN 3D PARA LA MANIPULACIÓN DE CAJAS EN UNA MATRIZ DE ALMACENAMIENTO

    Directory of Open Access Journals (Sweden)

    Paola Andrea Rey Molina

    2013-01-01

    Full Text Available A través de éste artículo se presentan los resultados obtenidos en el desarrollo del proyecto de un prototipo de brazo robótico que permite manipular sustancias u objetos que coloquen en riesgo la vida e integridad del operario, el proyecto está pensado y dirigido hacia empresas que manejen altos volúmenes de producción y que manipulen sustancias químicas u objetos que impliquen alto riesgo para el ser humano.

  13. 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.

  14. Facies metamórficas y edades relativas de las rocas del extremo oriental del Brazo Huemul, provincia de Neuquén Metamorphic facies and relative ages of rocks on the eastern part of Brazo Huemul, Neuquén province

    Directory of Open Access Journals (Sweden)

    M.F. Gargiulo

    2006-06-01

    Full Text Available El estudio de las asociaciones minerales y facies metamórficas presentes en las rocas del extremo oriental del Brazo Huemul del lago Nahuel Huapi permitió establecer la sucesión temporal de aquellas unidades cuyos afloramientos son saltuarios, principalmente debido a la exuberante cubierta vegetal que caracteriza a este sector situado en el extremo sur de la provincia de Neuquén. En el área de estudio afloran rocas de composición principalmente tonalítica, que en este trabajo se correlaciona con el batolito patagónico Subcordillerano debido a que están atravesadas por dos tipos de diques básicos. Un grupo de estos diques está caracterizado por la asociación albita - clorita - epidoto - cummingtonita/grunerita - hornblenda, que indica condiciones de metamorfismo térmico transicional entre la facies de hornfels de albita - epidoto hacia la facies de hornfels de hornblenda, metamorfismo originado por la intrusión del Batolito Patagónico Cordillerano de edad cretácica. Motivo por lo cual estos diques han sido correlacionados con la Formación Montes de Oca. Los diques básicos correspondientes al otro tipo no están hornfelizados pero muestran asociaciones de metamorfismo de muy bajo grado en facies zeolita de alta temperatura (clorita + pumpellyita + laumontita + clorita/esmectita + óxidos de hierro y/o poseen alteración propilítica, por lo cual fueron asignados a la F. Ventana. La distinción entre estos dos tipos de diques permite poner en discusión la edad relativa del cuerpo tonalítico que los hospeda, proponiéndose en este trabajo una edad relativa jurásica inferior a media para el mismo.The study of mineral assemblages and metamorphic facies in rocks exposed on the eastern margin of Brazo Huemul, Nahuel Huapi Lake, allowed the reconsideration of the temporal succession of units whose outcrops are isolated and difficult to locate due to the exuberant forest that covers the southestern part of Neuquén province. The rocks

  15. 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...

  16. 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....

  17. 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

  18. ANÁLISIS BIOMECÁNICO DE ESPALDA Y BRAZOS PARA EL DESARROLLO DE HERRAMIENTAS PORTÁTILES BIOMECHANICAL ANALYSIS OF ARMS AND BACK FOR THE DEVELOPMENT OF PORTABLE TOOLS

    Directory of Open Access Journals (Sweden)

    Hugo Andrés López Fisco

    2008-12-01

    Full Text Available Cuando se realizan labores agrícolas semimecanizadas como fertilización, fumigación, cosecha y otras, los operarios regularmente llevan una carga en su espalda y una herramienta en una de sus manos. En este trabajo se estimaron los esfuerzos que se generan en las articulaciones del hombro y del disco intervertebral L5-S1, para una persona promedio realizando labores agrícolas con herramientas portátiles de este tipo. Para hacer el análisis se desarrolló una herramienta computacional denominada HOMO, en la cual se consideran las posiciones más comunes del brazo e inclinaciones más comunes del eje de la columna vertebral cuando se usan equipos de espalda. El análisis determinó que una carga en la espalda de 12 kg combinada con un elemento de 0,5 kg en la mano, no son perjudiciales para la salud de los trabajadores agrícolas.In semi-mechanized agricultural labors such as fertilization, pesticide application, harvesting and others, operators usually carry loads in backpacks and a tool in one of their hands. This work estimated the stresses that result in the shoulder and in the inter-vertebral disk L5-S1 of an average operator performing agricultural labors with back-mounted equipment. In order to perform the analysis it was developed a computational tool called HOMO, which considers the most common positions of the arm and the most common inclinations of the backbone when using back-mounted equipment. This analysis determined that a 12 kg load on the operator’s back, combined with a 0,5 kg tool in the operator’s hand, are not harmful for the studied joints.

  19. Evaluación y aplicación de la medida en la circunferencia del brazo como prueba de tamizaje en el diagnóstico del estado nutricional de niños menores de cinco años

    OpenAIRE

    Criales de Castro, Martha

    2011-01-01

    La medida de la circunferencia del brazo se viene utilizando como un indicador del estado nutricional, especialmente en niños, por tratarse de un método simple y rápido, aplicable a través de un equipo mínimo, sencillo y fácil de transportar. Para establecer su validez como instrumento de tamizaje, es necesario evaluarlo frente a otros criterios de clasificación aceptados como ciertos como son la relación peso para la edad y peso para la talla, lo cual es posible a través del análisis sensibi...

  20. DCS Terrain Submission for Brazos TX

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Terrain data, as defined in FEMA Guidelines and Specifications, Appendix N: Data Capture Standards, describes the digital topographic data that was used to create...

  1. 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.

  2. 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...

  3. 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,...

  4. 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...

  5. 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.

  6. Transformational Change of the Texan Army during the Texas War for Independence

    Science.gov (United States)

    2010-12-10

    system used by the Mexican government as a means of colonization. 8 Sabine RiverTrinity RiverBrazos River Colorado River Nueces River San Antonio San...maritime mart. With a force of five hundred men---two hundred from Bexar join and three hundred Texans whom he expected to meet him on the Nueces --he could...century military vernacular discipline indicates order and control or training. 92 Brazos River Colorado River Nueces River San Antonio Gulf of

  7. Measuring River Pollution

    Science.gov (United States)

    Ayyavoo, Gabriel

    2004-01-01

    The Don River watershed is located within Canada's most highly urbanized area--metropolitan Toronto. Many residential and commercial uses, including alterations to the river's course with bridges, have had a significant impact on the Don's fauna and flora. Pollutants have degraded the river's water quality, a situation exacerbated by the…

  8. 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

  9. Ice Atlas 1985 - 1986. Monongahela River, Allegheny River, Ohio River, Illinois River and Kankakee River.

    Science.gov (United States)

    1987-11-01

    V 0 1m =1 uvydae aury1,18 Belevlle oo Sufc MAPUNTS( MArea concentration MAP NITS(in 2 x 106) (%/) Oppen water 24.97 NA Solid ice cover 0.00 NA Solid...January 28, 1986 ideo Ta-pe 14 Lock and Dam #3 Pool.- Allegheny River: 1/1 / New Kensington Bridge 19- Lock and Dam #2 Pool Surface MArea

  10. "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...

  11. 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....

  12. 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

  13. Sensitivity of reservoir storage and outflow to climate change in a water-limited river basin

    Science.gov (United States)

    Zhao, G.; Gao, H.; Naz, B. S.; Kao, S. C.; Voisin, N.

    2015-12-01

    During the past several decades, numerous reservoirs have been built across the world for a variety of purposes such as flood control, irrigation, municipal water supplies, and hydropower. Consequently, streamflow timing and magnitude are altered significantly by reservoir operations. In addition, the hydrological cycle can be modified substantially by a changing climate. Therefore, a distributed hydrological model which has an embedded reservoir component is essential for representing these effects in future water management planning strategies. In this study, a multi-purpose reservoir module was integrated into the Distributed Hydrology Soil Vegetation Model (DHSVM). The DHSVM model was selected because of its high spatial and temporal resolution and because of its explicit representation of the physical processes. Prescribed operating rules, which are designed to reduce flood risk and enhance water supply reliability, were adopted in this module. The integrated model was tested over a water-limited basin (i.e. the central Brazos River Basin, Texas). Both the calibration and validation results suggest that the model performed robustly at daily, weekly, and monthly levels. Subsequently, the effect of climate sensitivity on reservoir storage and outflow was assessed by perturbing precipitation within a range from -30% to 30% and temperature from -2 °C to 2 °C. Results suggest that both variables are more sensitive to precipitation than temperature. However, there are more uncertainties associated with future precipitation than temperature. It was also found that the sensitivities vary significantly by season. Enabled with the new reservoir component, the DHSVM model provides a platform for projecting future water availability estimations under flow regulation, climate change, and land cover/land use changes. We expect this integrated model to be beneficial for sustainable water resources management.

  14. 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...

  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. Pedaleo de brazos en personas con lesión medular, parálisis cerebral o ataxia cerebelosa: Parámetros fisiológicos. [Armcrank pedaling in persons with spinal cord injury, cerebral palsy or cerebellar ataxia: Physiological parameters].

    Directory of Open Access Journals (Sweden)

    Iris González-Carbonell

    2016-10-01

    Full Text Available Los desórdenes neurológicos generan afectación física y derivan en sedentarismo, enfermedades coronarias y obesidad o diabetes, reduciendo tanto la esperanza como la calidad de vida. La oferta de actividad física adaptada es escasa por falta de información específica sobre la forma de adecuarlo y dosificarlo a las personas que presentan estos desórdenes. Con el fin de comparar el efecto del ejercicio de pedaleo de brazos sobre la respuesta fisiológica y la percepción del esfuerzo, en 8 personas con lesión medular, 4 con parálisis cerebral y 4 con ataxia de Friedreich, se analizó su respuesta fisiológica, así como su percepción subjetiva al esfuerzo, frente a un grupo Control (16 participantes. Para ello realizó un ejercicio normalizado de pedaleo de brazos en un ergómetro y se midieron frecuencia cardíaca, frecuencia respiratoria, volumen corriente, volumen espirado, consumo de Oxígeno relativo, pulso de Oxígeno y percepción del esfuerzo y se realizó un ANOVA con estas variables. Para el grupo con lesión medular, el estrés y gasto energético resultaron los más bajos. El grupo con parálisis cerebral mostró los niveles de estrés más altos, además percibiéndolo como una carga moderada. El grupo con ataxia de Friedreich, mostró respuestas cardiorrespiratorias altas intermedias. Se puede concluir que diferentes desórdenes neurológicos muestran respuestas fisiológicas muy diferentes frente al ejercicio y es importante su control. Abstract Neurological disorders produce physical impairment that result in physical inactivity, heart disease and obesity or diabetes, reducing both life expectancy and quality of life. The supply of adapted physical activity is limited by lack of specific information on how to adapt and dosed to people who have these disorders. In order to compare the effect of armcrank pedaling exercise on their physiological response and perception of effort, 8 people with spinal cord injury, 4 with

  18. 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...

  19. 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...

  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. 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,...

  2. 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...

  3. 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...

  4. 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.

  5. 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...

  6. 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)...

  7. 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.

  8. 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....

  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 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....

  11. 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....

  12. 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....

  13. 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....

  14. 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....

  15. 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...

  16. 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....

  17. 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...

  18. 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....

  19. 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....

  20. 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....

  1. 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...

  2. 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

  3. 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...

  4. 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…

  5. 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).

  6. Anthropometry of height, weight, arm, wrist, abdominal circumference and body mass index, for Bolivian adolescents 12 to 18 years: Bolivian adolescent percentile values from the MESA study Referencias antropométricas de los adolescentes bolivianos de 12 a 18 años: estatura, peso, circunferencia del brazo, muñeca y abdominal, índice de masa corporal: Percentiles de adolescentes bolivianos (PAB del estudio MESA

    Directory of Open Access Journals (Sweden)

    A. Baya Botti

    2009-06-01

    Full Text Available Anthropometry is important as clinical tool for individual follow-up as well as for planning and health policymaking at population level. Recent references of Bolivian Adolescents are not available. The aim of this cross sectional study was to provide age and sex specific centile values and charts of Body Mass Index, height, weight, arm, wrist and abdominal circumference from Bolivian Adolescents. Data from the MEtabolic Syndrome in Adolescents (MESA study was used. Thirty-two Bolivian clusters from urban and rural areas were selected randomly considering population proportions, 3445 school going adolescents, 12 to 18 y, 45% males; 55% females underwent anthropometric evaluation by trained personnel using standardized protocols for all interviews and examinations. Weight, height, wrist, arm and abdominal circumference data were collected. Body Mass Index was calculated. Smoothed age- and gender specific 3rd, 5th, 10th, 25th, 50th, 75th, 85th, 90th, 95th and 97th Bolivian adolescent percentiles(BAP and Charts(BAC where derived using LMS regression. Percentile-based reference data for the antropometrics of for Bolivian Adolescents are presented for the first time.La antropometría es una herramienta clínica importante para el seguimiento individual de los pacientes así como para la planificación de políticas públicas. En Bolivia no existen referencias antropométricas nacionales para adolescentes. El objetivo de este estudio transversal fue de desarrollar percentiles y diagramas de crecimiento para peso, talla, índice de masa corporal, presión arterial sistólica y diastólica, circunferencia de muñeca, brazo y abdominal de adolescentes bolivianos. Los datos antropométricos en el estudio MESA (Síndrome metabólico en adolescentes bolivianos fueron obtenidos a partir de 32 unidades muestrales, considerando proporcionalidad muestral con reposición. Fueron evaluados 3445 adolescentes de 12 a 18, 45% hombres; 55% mujeres, de colegios de

  7. 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

  8. 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

  9. 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.

  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. 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

  12. 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

  13. Shoaling Analysis at Brazos Island, Harbor Inlet, Texas

    Science.gov (United States)

    2015-10-01

    study, the effect of not maintaining the channel to 44 ft MLT results in annual cost penalties of over $5.7 million per year for a 38 ft draft...and, consequently, is not a high priority for maintenance dredging funding. However, any impacts to inbound vessels ensure a major negative economic

  14. Complicações e intercorrências associadas ao edema de braço nos três primeiros meses pós mastectomia Complicaciones e intercurrencias asociadas al edema de brazo en los tres primeros meses después de la mastectomía Complications and intercurrences associated with arm edema in the first three months following mastectomy

    Directory of Open Access Journals (Sweden)

    Marislei Sanches Panobianco

    2002-07-01

    Full Text Available Este estudo buscou identificar complicações, intercorrências e aparecimento de edema pós cirurgia por câncer de mama, e fatores que poderiam estar predispondo ao linfedema do braço do lado operado. É um estudo descritivo, prospectivo e de abordagem quantitativa. A população constou de 17 mulheres submetidas à cirurgia unilateral por câncer de mama, em um hospital-escola. A coleta de dados deu-se por meio do acompanhamento semanal dos sujeitos, nos três meses pós-cirurgia. O edema apareceu em 11 mulheres, sendo, em nove, de grau leve, e, em duas de grau moderado. É importante lembrar que o edema leve poderá tornar-se grave se não tratado, devidamente. Observou-se, entre as mulheres com edema, complicações, intercorrências, e outras variáveis. Os resultados revelam a importância do acompanhamento de enfermagem no pós-operatório, e a necessidade de um melhor preparo dos profissionais para a orientação de pacientes, com o objetivo de prevenir o linfedema.Este estudio buscó identificar complicaciones, intercurrencias y el aparecimiento del edema después de la cirugía por cáncer de mama y factores que pueden estar facilitando el aparecimiento del linfodema del brazo del lado operado. Es un estudio descriptivo, prospectivo y de abordaje cuantitativa. La población fue formada por 17 mujeres sometidas a cirugía unilateral por cáncer de mama en un hospital escuela. La recolección de datos ocurrió a través del seguimiento semanal de los sujetos, en los tres meses después de la cirugía. El edema apareció en 11 mujeres, siendo en nueve de grado leve y en dos de grado moderado. Es importante recordar que el edema leve podrá tornarse grave si no es tratado. Se observó entre las mujeres con edema, complicaciones, intercurrencias y otras variables. Los resultados revelan la importancia del seguimiento de enfermería en la fase posquirúrgica y la necesidad de una mejor preparación de los profesionales para la orientaci

  15. 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

  16. Skjern River Restoration Counterfactual

    DEFF Research Database (Denmark)

    Clemmensen, Thomas Juel

    2014-01-01

    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...... history and more openness towards constant change. In this approach the idea of palimpsest as metaphor for the cultural landscape plays an important role. Rather than being an obstacle for the restoration of nature, the historical layer following the comprehensive cultivation project from the 1960s...

  17. 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.

  18. 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...

  19. 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…

  20. 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

  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. 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.

  3. 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

  4. 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...

  5. 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...

  6. 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)...

  7. 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...

  8. 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.

  9. 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

  10. 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.

  11. 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.

  12. 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.

  13. 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...

  14. 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.

  15. 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.

  16. 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...

  17. 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,...

  18. 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...

  19. 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...

  20. 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...

  1. 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...

  2. 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.

  3. 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...

  4. 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...

  5. Missouri River, Natural Resources Bibliography.

    Science.gov (United States)

    1997-07-01

    Dissertation Abstracts, UnCover, Agricola , and terrestrial habitats adjacent to the river resulted in a variety of bibliographies available on the Internet...106- 232. BUSINESS RESEARCH BUREAU. 1960. 16. Recreational survey of Lewis and Clark Lake and Fort Randall Reservoir. Bus. Res. Bur., 224. BURGESS RL...and 834. HORNER AND SHIFRIN I. 1987. Flood protection zoogeography of the Missouri River Valley in for Missouri Bottoms. Prepared for Business North

  6. Grado de acuerdo entre los índices adiposo-musculares obtenidos a partir de medidas antropométricas del brazo, pliegues cutáneos e impedancia bioeléctrica Interchangeability of the fat-to-fat-free mass ratios obtained by arm anthropometric measures, skinfold thickness and bioelectrical impedance

    Directory of Open Access Journals (Sweden)

    V. Martín Moreno

    2003-04-01

    Full Text Available Objetivo: La masa grasa, la masa libre de grasa y la relación entre ambas, el índice adiposo-muscular, son parámetros útiles para valorar clínicamente al paciente. El objetivo de este estudio es medir el grado de acuerdo entre los índices adiposo-musculares corporales (IAMC obtenidos mediante los pliegues cutáneos con la ecuación de Siri para cuatro pliegues (IAMC Siri y para el pliegue del tríceps (IAMCtríceps; por bioimpedanciometría (IAMC Omron; y mediante las áreas adiposa y muscular del brazo (IAM, valorando su intercambiabilidad. Intervenciones: Estudio descriptivo transversal. Se valoró mediante antropometría e impedancia bioeléctrica (Omron BF 300® a 145 personas, analizándose la concordancia entre métodos mediante el coeficiente de correlación intraclase (CCI y el método de Bland-Altman. El método de referencia fue IAMC Siri. Resultados: El CCI entre IAMC Siri e IAMCtríceps fue de 0,9304 (0,9035; 0,9498, entre IAMC Siri e IAMC Omron de 0,9114 (0,8771; 0,9361 y entre IAMC Siri e IAM de 0,7726 (0,6846; 0,8361. Con el método de Bland-Altman IAMC Siri e IAMCtríceps (- 0,171; 0,117 presentan el intervalo de concordancia más estrecho, seguido de IAMC Siri - IAMC Omron (- 0,186; 0,178. Los límites del intervalo entre IAM e IAMC Siri (- 0,2; 0,42, IAMCtríceps (- 0,26; 0,42 o IAMC Omron (- 0,292; 0,504 superaron el punto de corte (- 0,2; 0,2. Conclusiones: IAMCtríceps e IAMC Omron son intercambiables entre sí y con IAMC Siri, pero IAM no es intercambiable con IAMC Siri, IAMCtríceps o IAMC Omron, resultado que sugiere que el IAM puede no reflejar adecuadamente la composición corporal. IAMCtríceps e IAMC Omron son alternativas válidas a IAMC Siri en la valoración del índice adiposo-muscular.Background: Body fat, fat free mass and the relationship between both, the fat-to-fat-free mass ratio are useful parameters in the nutritional evaluation of the patient. The aim of this study is to evaluate the degree of

  7. Existe déficit bilateral na realização de 10RM em exercícios de braços e pernas? ¿Hay déficit bilateral al realizar 10RM en ejercicios de brazos y piernas? Is there bilateral deficit in the practice of 10RM in arm and leg exercises?

    Directory of Open Access Journals (Sweden)

    Walace David Monteiro

    2006-06-01

    Full Text Available Os exercícios resistidos (ER podem ser realizados de forma uni e bilateral. Dependendo da forma pela qual o movimento é conduzido, verifica-se a presença do déficit bilateral. Os estudos de déficit bilateral concentraram seus esforços na investigação do fenômeno em exercícios realizados com uma repetição máxima e pouco se sabe sobre o seu comportamento em exercícios com várias repetições. O presente estudo teve como objetivos: a comparar a carga obtida em 10 repetições máximas (10RM nos diferentes dimídios corporais em exercícios de braços e pernas; b comparar a soma das ações unilaterais com os resultados obtidos bilateralmente nos mesmos exercícios. Foram avaliadas 20 mulheres treinadas com idade entre 18 e 30 anos (24 ± 6 anos no teste de 10RM de forma uni e bilateral nos exercícios selecionados. A análise estatística foi realizada pelo teste t de Student pareado, para verificar a existência de diferença entre os membros, bem como no somatório dos dois membros separadamente em relação ao trabalho realizado bilateralmente. Para todos os procedimentos considerou-se um nível de significância de p Los ejercicios resistidos (ER pueden ser realizados de forma unilateral y bilateral. Dependiendo de la forma como el movimiento es conducido, se verifica la presencia de déficit bilateral. Los estudios de déficit bilateral concentraron sus esfuerzos en la investigación del fenómeno en ejercicios realizados con repetición máxima y poco se sabe sobre su comportamiento en ejercicios con varias repeticiones. El presente estudio tuvo como objetivos: a comparar la carga obtenida en 10 repeticiones máximas (10RM en los diferentes segmentos corporales en ejercicios de brazos y piernas; b comparar la suma de las acciones unilaterales con los resultados obtenidos bilateralmente en los mismos ejercicios. Fueron evaluadas 20 mujeres preparadas con edades entre 18 y 30 años (24 ± 6 años en el test de 10RM de forma uni e

  8. 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.

  9. 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...

  10. 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

  11. 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.

  12. 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)

  13. 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...

  14. Comparação entre a utilização de saliva e sangue para determinação do lactato mínimo em cicloergômetro e ergômetro de braço em mesa-tenistas Comparacion entre la utilizacion de saliva y sangre para la determinacion del lactato mínimo en cicloergómetro y ergómetro de brazo en tenistas de mesa Comparison between the use of saliva and blood for the minimum lactate determination in arm ergometer and cycle ergometer in table tennis players

    Directory of Open Access Journals (Sweden)

    Alessandro Moura Zagatto

    2004-12-01

    +min ciclo-saliva 135,49 ± 33,21, não foram diferentes significativamente. Contudo, essas intensidades não apresentaram correlações significativas. Pode-se então concluir que a utilização de metabólitos na saliva para determinação do TLM não parece ser possível para esse protocolo quando os ergômetros utilizados são o ergômetro de braço isocinético e o cicloergômetro.El objetivo de estudio fué el de verificar la posibilidad de determinar el test de lactato mínimo (TLM con concentraciones de sodio (Na+, potasio (K+ y lactato (LAC en la saliva en ergómetro de brazo y cicloergómetro. Fueron participantes de este estudio ocho tenistas de mesa de nivel internacional. Como estímulo anaeróbico en el TLM en ambos ergômetros, fueron utilizados tests máximos de 30 segundos. En el ergómetro de brazo isocinético (CYBEX UBE 2432 fué aplicada la fuerza máxima con rotación fija en 102 rpm en el cicloergómetro aplicando una carga de 7,5% del peso corporal (Kp. Después del estímulo anaeróbico en el ergómetro de brazo, fué iniciado un test incremental con rotaciones en la manivela constante a 60 rpm, iniciando a 49 Watts con aumento de 16 Watts en cada etapa de 3 minutos del ejercicio. La intensidad correspondiente al TLM fué determinado con muestras de sangre y saliva (LACmin brazo; Na+min brazo-saliva e K+min braço-saliva, respectivamente. Para el cicloergometro, la carga inicial fue de 85 Watts y aumento de 17 Watts con rotación del pedal constante a 70 rpm. Cada etapa de ejercicio también tiene una duración de 3 minutos. El LACmin fué determinado utilizando las muestras de sangre y saliva (LACmin ciclo; Na+min ciclo-saliva, K+min ciclo-saliva e LACmin ciclo-saliva, respectivamente. En ambos ergómetros, las intensidades obtenidas en el TLM fueron correspondientes a la derivada cero del ajuste polinominal entre metabólito versus intensidad. Fueron utilizados como procedimientos estadísticos, el test ANOVA One Way, test "t" de Student apareado

  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

    2016-12-01

    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.

  17. 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.

  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. 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.

  20. 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

  1. 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.

  2. 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...

  3. 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....

  4. 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...

  5. 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...

  6. 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...

  7. 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...

  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. 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....

  13. 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...

  14. 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:...

  15. 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:...

  16. 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....

  17. 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....

  18. 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...

  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. 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....

  1. 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.

  2. 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.

  3. 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...

  4. 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...

  5. 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...

  6. 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....

  7. 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....

  8. 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...

  9. 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...

  10. 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...

  11. 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...

  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. Kentucky River and Tributaries. Upper Kentucky River Navigation Project. Volume 2. Public Involvement Record.

    Science.gov (United States)

    1980-11-01

    River and as a child , it was one of the greatest things to see the dredge boat come up the Kentucky River. Of course, this discourages river traffic...Portat as a tourist attraction Lock 145 had been neglete during Fr’anfo’ 5 Melodye Park was a the war years and were in very bad product o the river’s

  14. 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.

  15. 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.

  16. 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

  17. 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...

  18. 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.

  19. 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

  20. 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...

  1. 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

  2. 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.

  3. 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...

  4. 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

  5. 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

  6. 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.

  7. Avaliação eletromiográfica de músculos da cintura escapular e braço durante exercícios com carga axial e rotacional Evaluación electromiográfica de músculos de la cintura escapular y brazos durante ejercicios con cargas axial y rotacional Electromyographic assessment of the shoulder girdle and arm muscles during exercises with axial and rotational loads

    Directory of Open Access Journals (Sweden)

    Anamaria Siriani de Oliveira

    2006-02-01

    extremidad libre con la carga rotacional externa (ELCR. Se seleccionaron 20 voluntarias (23,2 años ± 0,9 sedentarias. Ellos estimaron el grosor en mm. de los tríceps del brazo, los bíceps del brazo, pectoral mayor, trapecio y deltoides. El registro electromiográfico de superficie se hizo, durante la realización de los ejercicios con EFCA y de los con ELCR, usando 100% de la resistencia máxima establecidos previamente. Se compararon los valores de RMS normalizados por la reducción máxima voluntaria a través de modelo de efectos mixtos con un nivel de significancia de 5%. En estas condiciones experimentales, los resultados del estudio presente mostraron que ejercicios similares, clasificados por la condición de la extremidad y la dirección de la carga aplicada al miembro superior, promoven niveles similares de electromiografía con actividad en sólo parte de los músculos estudiados. Estos descubrimientos cuestionan la capacidad del sistema de la clasificación usada en este estudio para predecir el tipo de respuesta muscular esperada en el logro de tareas diferentes de misma clasificación.The knowledge of the electromyographic activity produced during shoulder exercises can help in determining its clinical applicability. The purpose of this study was to assess the influence of the load direction and the extremity condition on the electrical activity of the shoulder girdle and upper limb muscles during exercises with fixed distal extremity and external axial load (FEAL and mobile extremity with rotational external load (MERL. Twenty 23.2 ± 0.9 years old female sedentary volunteers were selected. The triceps brachii, biceps brachii, major pectoral, trapezium and deltoid muscles were assessed. The surface electromyography was recorded during two FEAL and two MERL exercises using 100% of the previously established maximal resistance. The RMS values normalized by the maximal voluntary contraction were compared by a mixed effect model with 5% significance level. In

  8. 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

  9. 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.

  10. 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.

  11. 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...

  12. 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.

  13. 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.

  14. 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

  15. 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

  16. 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.

  17. 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.

  18. 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.

  19. 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.

  20. 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.

  1. 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.

  2. 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.

  3. 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.

  4. 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,...

  5. 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...

  6. 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...

  7. 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,...

  8. 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...

  9. 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.

  10. 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...

  11. 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.

  12. 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.

  13. 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.

  14. 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

  15. 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)....

  16. 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:...

  17. 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.

  18. 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.

  19. 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.

  20. 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...

  1. 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...

  2. 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

  3. 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)

  4. 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)

  5. 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)

  6. 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)

  7. 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),...

  8. 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.

  9. 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

  10. 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.

  11. 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...

  12. 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

  13. 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

  14. 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.

  15. 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

  16. 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

  17. 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...

  18. 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.

  19. 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.

  20. 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...

  1. 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.)

  2. 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.

  3. 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....

  4. 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.

  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. 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...

  8. 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...

  9. 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.

  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. 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.

  12. 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...

  13. 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...

  14. 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.

  15. The Trinity River Greenway: A Prototype

    Science.gov (United States)

    1972-06-01

    oLandulosa) (Smilax bona-nox) Carolina Moonseed Wild Plum Eve’s Necklace (Cocculus carolirus) (Prunus mexicana ) (Sophora affinis) Dwarf Dogwood Hoptree...river profile emerges. Norma ".1, small ox bow cut-offs would be filled in, and only those longer stretches of natural river not used for channel left

  16. 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...

  17. 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...

  18. 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...

  19. 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...

  20. 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...

  1. 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

  2. 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

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. 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

  9. Áreas de secção transversa do braço: implicações técnicas e aplicações para avaliação da composição corporal e da força dinâmica máxima Area de sección transversa del brazo: implicaciones técnicas y aplicaciones para avaliación de la composición corporal y de la fuerza dinámica máxima Arm cross-section areas: technical implications and applications for body composition and maximal dynamic strength evaluation

    Directory of Open Access Journals (Sweden)

    Fernando A.M.S. Pompeu

    2004-06-01

    Full Text Available As áreas do tecido muscular (A MB e do anel de gordura do braço (A GB, podem ser estimadas por medidas antropométricas. OBJETIVO: Investigar a validade e o erro intertestador da antropometria para inferência A MB e do A GB. Secundariamente, estudou-se a previsão da força dos membros superiores e tronco através da A MB. MÉTODOS: Foram voluntários para este estudo 40 adultos masculinos jovens (25 ± 6 anos; 72,6 ± 9,4kg, divididos aleatoriamente nos grupos de validade interna (VI, n = 30 e validade externa (VE, n = 10. Determinou-se para VI, através de conceitos geométricos, a área total do braço (A TB, A MB, A GB e área percentual de gordura do braço. O somatório de oito dobras cutâneas (S DC8 foi empregado como índice da adiposidade corporal. A força dos membros superiores e do tronco foi medida através da carga máxima alcançada no exercício supino reto livre (1-RM. As medidas antropométricas foram realizadas por dois avaliadores independentes. Os dados foram tratados por meio da análise de regressão, coeficiente de correlação intraclasse (ICC e teste t de Student pareado (a Las áreas del tejido muscular (A MB y del de grosor del brazo (A GB, pueden ser estimadas por medidas antropométricas. OBJETIVO: Investigar la validación de el error inter-testeo de la antropometría para inferencia del A MB y del A GB. Secundariamente, se estudió la previsión de la fuerza de los miembros superiores y del tronco a través de la A MB. METODOS: Fueron voluntarios para este estudio 40 jóvenes masculinos (25 ± 6 años; 72,6 ± 9,4 kg, divididos aleatoriamente en los grupos de validación interna (VI, n = 30 y de validación externa (VE, n = 10. Se determinó para VI, a través de conceptos geométricos, el área total del brazo (A TB, A MB, A GB y el área porcentual de gordura de el brazo. La sumatoria de ocho pliegues cutáneos (S DC8 fue empleado como índice de la adiposidad corporal. La fuerza de los miembros superiores y

  10. 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.

  11. 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.

  12. 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.

  13. 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...

  14. 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

  15. 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.

  16. 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

  17. 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

  18. 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.

  19. 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.

  20. 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

  1. 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.

  2. 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.

  3. 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.

  4. 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;...

  5. 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...

  6. 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...

  7. 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...

  8. Associação do índice tornozelo-braço com inflamação e alterações minerais ósseas em pacientes em hemodiálise Asociación del índice Tobillo-Brazo con la inflamación y trastornos minerales óseos en pacientes en hemodiálisis Association of ankle-arm index with inflammation and mineral bone disorder in hemodialysis patients

    Directory of Open Access Journals (Sweden)

    Jair B. Miguel

    2011-05-01

    Full Text Available FUNDAMENTO: O índice tornozelo-braço (ITB reduzido, inflamação e distúrbio mineral ósseo (DMO estão associados com aumento no risco de morte e complicações cardiovasculares em pacientes em hemodiálise (HD, mas a relação entre esses fatores necessita ser elucidada. OBJETIVO: Avaliar a associação entre ITB anormal e DMO com inflamação em pacientes em HD. MÉTODOS: Esta análise transversal avaliou 478 pacientes em HD por pelo menos 1 ano. O ITB foi avaliado através de um Doppler portátil e manômetro de coluna de mercúrio. Os pacientes foram divididos em três grupos, de acordo com o ITB (baixo: 1,3. As medidas de proteína C-reativa foram utilizadas como marcador inflamatório, enquanto a DMO foi avaliada através dos níveis de cálcio, fósforo e hormônio paratireoidiano intacto (iPTH. RESULTADOS: Os participantes tinham 54 (18 a 75 anos, 56% eram do sexo masculino, 17% eram diabéticos e estavam em HM por 5 (1 a 35 anos. A prevalência de ITB baixo, normal e alto AAI foi 26,8%, 64,6% e 8,6%, respectivamente. Usando um modelo de regressão logística condicional com procedimento backward, idade (p6 mg/L (p= 0,006 estavam associados com a presença de ITB baixo, enquanto o sexo masculino (pFUNDAMENTO: El índice tobillo-brazo (ITB reducido, la inflamación y el trastorno mineral óseo (TMO se asocian con mayor riesgo de muerte y complicaciones cardiovasculares en pacientes sometidos a hemodiálisis (HD, pero la relación entre estos factores debe ser aclarada. Objetivos: Evaluar la asociación entre el ITB anormal la TMO con inflamación en paciente en HD. MÉTODOS: Este análisis transversal evaluó a 478 pacientes en HD durante al menos 1 año. El ITB se midió con un Doppler portátil y manómetro de columna de mercurio. Los pacientes fueron divididos en tres grupos, de acuerdo al ITB (bajo: 1,3. Las mediciones de proteína C-reactiva se utilizaron como marcador inflamatorio, mientras que la TMO se evaluó a través de los

  9. A hydrodynamic-numerical model of the river Rhine [online

    OpenAIRE

    Minh Thu, Pham Thi

    2007-01-01

    Abstract During the last centuries the river Rhine underwent a major regulation process which separated the river­bed from its flood plains and reduced the available areas for flooding. The river was straightened and the consequence is the discharge conditions were strongly changed and many recorded flood events were occurred. Serious floods at the river Rhine in 1993 and 1995 resulted in the policy "Room for the Rivers" and in 1998 in the "Action Plan Flood Defenc...

  10. 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.

  11. 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.

  12. 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.

  13. 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.

  14. 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.

  15. 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.

  16. 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.

  17. Umpqua River Oregon Active Channel 1994

    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...

  18. 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...

  19. 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...

  20. 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...

  1. 1999 Yellow River Aerial Photos, Central Wisconsin

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The 25-mile stretch of the Yellow River adjacent to the Necedah National Wildlife Refuge in Central Wisconsin provides valuable habitat to numerous species of...

  2. 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...

  3. 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...

  4. 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,...

  5. Umpqua River Oregon Active Channel 2000

    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...

  6. Umpqua River Oregon Active Channel 1939

    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...

  7. 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

  8. 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

  9. 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...

  10. Canoeing on the Sheenjek River: Draft

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report summarizes a recreational canoe trip on the Upper Sheenjek River in the Arctic National Wildlife Refuge. The report describes the author's experiences...

  11. 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...

  12. 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)

  13. 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...

  14. 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.

  15. Umpqua River Oregon Active Channel 1967

    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...

  16. 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.

  17. 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...

  18. 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...

  19. 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.

  20. 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...

  1. 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...

  2. 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...

  3. 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.

  4. 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...

  5. 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...

  6. 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.

  7. 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).

  8. 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...

  9. 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...

  10. 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).

  11. 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...

  12. 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.

  13. DNR 100K Lakes and Rivers

    Data.gov (United States)

    Minnesota Department of Natural Resources — Polygons representing hydrographic features (lakes, ponds, some rivers, and open water areas) originating from the USGS 1:100,000 (100K)DLG (Digital Line Graph)...

  14. Modelling planform changes of braided rivers

    NARCIS (Netherlands)

    Jagers, Hendrik Reinhard Albert

    2003-01-01

    This study has focused on modelling techniques to predict planform changes of braided rivers and their relation with state-of-the-art knowledge on the physical processes and the availability of model input data

  15. Morphology of Tigris River within Baghdad City

    Directory of Open Access Journals (Sweden)

    A. A. Ali

    2012-10-01

    Full Text Available In recent years, substantial changes have occurred in the morphology of the River Tigris within Baghdad City. Although huge volumes of sediment are being trapped in recently constructed headwater reservoirs, the number of islands in the Tigris at Baghdad is increasing. The debris of bridges destroyed in the wars of 1991 and 2003 and their subsequent reconstruction have enhanced the development of these islands. As a consequence the ability of the river to carry the peaks of flood waters has been reduced. This has led to potential increase of flooding in parts of the city.

    The bed of the River Tigris has been surveyed on three occasions (1976, 1991, and 2008. The most recent survey was conducted by the Ministry of Water Resources, extended 49 km from the Al-Muthana Bridge north Baghdad to the confluence with the Diyala River south Baghdad. It yielded cross-section profiles at 250 m intervals. The data are used to predict the maximum flood capacity for the river using the one-dimensional hydraulic model for steady flow "HEC-RAS" modeling. Calibration of the model was carried out using field measurements for water levels along the last 15 km of the reach and the last 10 yr of observation at the Sarai Baghdad gauging station.

    The model showed a significant predicted reduction in the current river capacity below that which the river had carried during the floods of 1971 and 1988. The three surveys conducted on the same reach of the Tigris indicated that the ability of the river to transport water has decreased.

  16. Salmon River Habitat Enhancement. 1990 Annual Report

    Energy Technology Data Exchange (ETDEWEB)

    Rowe, Mike

    1991-12-01

    The annual report contains three individual subproject sections detailing tribal fisheries work completed during the summer and fall of 1990. Subproject I contains summaries of evaluation/monitoring efforts associated with the Bear Valley Creek, Idaho enhancement project. Subproject II contains an evaluation of the Yankee Fork of the Salmon River habitat enhancement project. Subproject III concerns the East Fork of the Salmon River, Idaho.

  17. River network routing on the NHDPlus dataset

    OpenAIRE

    David, Cédric; Maidment, David,; Niu, Guo-Yue; Yang, Zong-Liang; Habets, Florence; Eijkhout, Victor

    2011-01-01

    International audience; The mapped rivers and streams of the contiguous United States are available in a geographic information system (GIS) dataset called National Hydrography Dataset Plus (NHDPlus). This hydrographic dataset has about 3 million river and water body reaches along with information on how they are connected into net- works. The U.S. Geological Survey (USGS) National Water Information System (NWIS) provides stream- flow observations at about 20 thousand gauges located on theNHDP...

  18. Columbia River Component Data Gap Analysis

    Energy Technology Data Exchange (ETDEWEB)

    L. C. Hulstrom

    2007-10-23

    This Data Gap Analysis report documents the results of a study conducted by Washington Closure Hanford (WCH) to compile and reivew the currently available surface water and sediment data for the Columbia River near and downstream of the Hanford Site. This Data Gap Analysis study was conducted to review the adequacy of the existing surface water and sediment data set from the Columbia River, with specific reference to the use of the data in future site characterization and screening level risk assessments.

  19. Creating a catchment perspective for river restoration

    Science.gov (United States)

    Benda, L.; Miller, D.; Barquín, J.

    2011-03-01

    One of the major challenges in river restoration is to identify the natural fluvial landscape in catchments with a long history of river control. Intensive land use on valley floors often predates the earliest remote sensing: levees, dikes, dams, and other structures alter valley-floor morphology, river channels and flow regimes. Consequently, morphological patterns indicative of the fluvial landscape including multiple channels, extensive floodplains, wetlands, and fluvial-riparian and tributary-confluence dynamics can be obscured, and information to develop appropriate and cost effective river restoration strategies can be unavailable. This is the case in the Pas River catchment in northern Spain (650 km2), in which land use and development have obscured the natural fluvial landscape in many parts of the basin. To address this issue we coupled general principles of hydro-geomorphic processes with computer tools to characterize the fluvial landscape. Using a 5-m digital elevation model, valley-floor surfaces were mapped according to elevation above the channel and proximity to key geomorphic processes. The predicted fluvial landscape is patchily distributed according to topography, valley morphology, river network structure, and fan and terrace landforms. The vast majority of the fluvial landscape in the main segments of the Pas River catchment is presently masked by human infrastructure, with only 15% not impacted by river control structures and development. The reconstructed fluvial landscape provides a catchment scale context to support restoration planning, in which areas of potential ecological productivity and diversity could be targeted for in-channel, floodplain and riparian restoration projects.

  20. Tidal river dynamics: Implications for deltas

    Science.gov (United States)

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

    2016-03-01

    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 intrusion, a realm that can extend inland hundreds of kilometers. One key phenomenon resulting from this interaction is the emergence of large fortnightly tides, which are forced long waves with amplitudes that may increase beyond the point where astronomical tides have become extinct. These can be larger than the linear tide itself at more landward locations, and they greatly influence tidal river water levels and wetland inundation. Exploration of the spectral redistribution and attenuation of tidal energy in rivers has led to new appreciation of a wide range of consequences for fluvial and coastal sedimentology, delta evolution, wetland conservation, and salinity intrusion under the influence of sea level rise and delta subsidence. Modern research aims at unifying traditional harmonic tidal analysis, nonparametric regression techniques, and the existing understanding of tidal hydrodynamics to better predict and model tidal river dynamics both in single-thread channels and in branching channel networks. In this context, this review summarizes results from field observations and modeling studies set in tidal river environments as diverse as the Amazon in Brazil, the Columbia, Fraser and Saint Lawrence in North America, the Yangtze and Pearl in China, and the Berau and Mahakam in Indonesia. A description of state-of-the-art methods for a comprehensive analysis of water levels, wave propagation, discharges, and inundation extent in tidal rivers is provided. Implications for lowland river deltas are also discussed in terms of sedimentary deposits, channel bifurcation, avulsion, and salinity intrusion, addressing contemporary research challenges.

  1. Columbia River flow-time calculations

    Energy Technology Data Exchange (ETDEWEB)

    Soldat, J.K.

    1962-07-01

    An appraisal of available data on flow times in the Columbia River between the reactor areas and Pasco was made to permit extrapolation of the flow-time curves to lower river flow rates. Comparisons were made between data collected by the US Corps of Engineers and environmental monitoring data and with the previously developed equation for flow times. New equations were developed to fit curves over the range (4 to 40) x 10/sup 4/CFS.

  2. Creating a catchment perspective for river restoration

    Directory of Open Access Journals (Sweden)

    L. Benda

    2011-03-01

    Full Text Available One of the major challenges in river restoration is to identify the natural fluvial landscape in catchments with a long history of river control. Intensive land use on valley floors often predates the earliest remote sensing: levees, dikes, dams, and other structures alter valley-floor morphology, river channels and flow regimes. Consequently, morphological patterns indicative of the fluvial landscape including multiple channels, extensive floodplains, wetlands, and fluvial-riparian and tributary-confluence dynamics can be obscured, and information to develop appropriate and cost effective river restoration strategies can be unavailable. This is the case in the Pas River catchment in northern Spain (650 km2, in which land use and development have obscured the natural fluvial landscape in many parts of the basin. To address this issue we coupled general principles of hydro-geomorphic processes with computer tools to characterize the fluvial landscape. Using a 5-m digital elevation model, valley-floor surfaces were mapped according to elevation above the channel and proximity to key geomorphic processes. The predicted fluvial landscape is patchily distributed according to topography, valley morphology, river network structure, and fan and terrace landforms. The vast majority of the fluvial landscape in the main segments of the Pas River catchment is presently masked by human infrastructure, with only 15% not impacted by river control structures and development. The reconstructed fluvial landscape provides a catchment scale context to support restoration planning, in which areas of potential ecological productivity and diversity could be targeted for in-channel, floodplain and riparian restoration projects.

  3. RIVER PROTECTION PROJECT SYSTEM PLAN

    Energy Technology Data Exchange (ETDEWEB)

    CERTA PJ

    2008-07-10

    The U.S. Department of Energy (DOE), Office of River Protection (ORP) manages the River Protection Project (RPP). The RPP mission is to retrieve and treat Hanford's tank waste and close the tank farms to protect the Columbia River. As a result, the ORP is responsible for the retrieval, treatment, and disposal of the approximately 57 million gallons of radioactive waste contained in the Hanford Site waste tanks and closure of all the tanks and associated facilities. The previous revision of the System Plan was issued in September 2003. ORP has approved a number of changes to the tank waste treatment strategy and plans since the last revision of this document, and additional changes are under consideration. The ORP has established contracts to implement this strategy to establish a basic capability to complete the overall mission. The current strategy for completion of the mission uses a number of interrelated activities. The ORP will reduce risk to the environment posed by tank wastes by: (1) Retrieving the waste from the single-shell tanks (SST) to double-shell tanks (DST) for treatment and disposal; (2) Constructing and operating the WTP, which will safely treat all of the high-level waste (HLW) and about half of the low-activity waste (LAW) contained in the tank farms, and maximizing its capability and capacity; (3) Developing and deploying supplemental treatment capability or a second WTP LAW Facility that can safely treat about half of the LAW contained in the tank farms; (4) Developing and deploying treatment and packaging capability for transuranic (TRU) tank waste for shipment to and disposal at the Waste Isolation Pilot Plant (WIPP); (5) Deploying interim storage capacity for the immobilized HLW and shipping that waste to Yucca Mountain for disposal; (6) Operating the Integrated Disposal Facility for the disposal of immobilized LAW, along with the associated secondary waste, (7) Closing the SST and DST tank farms, ancillary facilities, and al1 waste

  4. RIVER PROTECTION PROJECT SYSTEM PLAN

    Energy Technology Data Exchange (ETDEWEB)

    CERTA PJ; KIRKBRIDE RA; HOHL TM; EMPEY PA; WELLS MN

    2009-09-15

    The U.S. Department of Energy (DOE), Office of River Protection (ORP) manages the River Protection Project (RPP). The RPP mission is to retrieve and treat Hanford's tank waste and close the tank farms to protect the Columbia River. As a result, ORP is responsible for the retrieval, treatment, and disposal of approximately 57 million gallons 1 of radioactive waste contained in the Hanford Site waste tanks and closure2 of all the tanks and associated facilities. The previous revision of the System Plan was issued in May 2008. ORP has made a number of changes to the tank waste treatment strategy and plans since the last revision of this document, and additional changes are under consideration. ORP has contracts in place to implement the strategy for completion of the mission and establish the capability to complete the overall mission. The current strategl involves a number of interrelated activities. ORP will reduce risk to the environment posed by tank wastes by the following: (1) Retrieving the waste from the single-shell tanks (SST) to double-shell tanks (DST) and delivering the waste to the Waste Treatment and Immobilization Plant (WTP). (2) Constructing and operating the WTP, which will safely treat all of the high-level waste (HLW) fraction contained in the tank farms. About one-third of the low-activity waste (LAW) fraction separated from the HLW fraction in the WTP will be immobilized in the WTP LAW Vitrification Facility. (3) Developing and deploying supplemental treatment capability assumed to be a second LAW vitrification facility that can safely treat about two-thirds of the LAW contained in the tank farms. (4) Developing and deploying supplemental pretreatment capability currently assumed to be an Aluminum Removal Facility (ARF) using a lithium hydrotalcite process to mitigate sodium management issues. (5) Developing and deploying treatment and packaging capability for contact-handled transuranic (CH-TRU) tank waste for possible shipment to and

  5. Water scarcity in the Jordan River basin.

    Science.gov (United States)

    Civic, M A

    1999-03-01

    This article reports the problem on water scarcity in the Jordan River basin. In the Jordan River basin, freshwater scarcity results from multiple factors and most severely affects Israel, Jordan, the West Bank, and the Gaza Strip. One of these multiple factors is the duration of rainfall in the region that only occurs in a small area of highlands in the northwest section. The varying method of water use parallels that of Israel that utilizes an estimated 2000 million cu. m. The national patterns of water usage and politically charged territorial assertions compound the competition over freshwater resources in the region. The combination of political strife, resource overuse, and contaminated sources means that freshwater scarcity in the Jordan River basin will reach a critical level in the near future. History revealed that the misallocation/mismanagement of freshwater from the Jordan River basin was the result of centuries of distinct local cultural and religious practices combined with historical influences. Each state occupying near the river basin form their respective national water development schemes. It was not until the mid-1990s that a shared-use approach was considered. Therefore, the critical nature of water resource, the ever-dwindling supply of freshwater in the Jordan River basin, and the irrevocability of inappropriate policy measures requires unified, definitive, and ecologically sound changes to the existing policies and practices to insure an adequate water supply for all people in the region.

  6. Hydrogeochemical characteristics of the River Idrijca (Slovenia

    Directory of Open Access Journals (Sweden)

    Tjaša Kanduč

    2008-06-01

    Full Text Available The hydrogeochemical and isotope characteristics of the River Idrijca, Slovenia, where the world’s second largest mercury (Hg mine is located, were investigated. The River Idrijca, a typical steep mountain river has an HCO3- - Ca2+ - Mg2+ chemical composition. Its Ca2+/Mg2+ molar ratio indicates that dolomite weathering prevails in the watershed. The River Idrijca and its tributaries are over saturated with respect to calcite and dolomite. The pCO2 pressure is up to 13 times over atmospheric pressure and represents a source of CO2 to the atmosphere. δ18O values in river water indicate primary control from precipitation and enrichment of the heavy oxygen isotope of infiltrating water recharging the River Idrijca from its slopes.The δ13 CDIC values range from −10.8 to −6.6 ‰ and are controlled by biogeochemical processes in terrestrial environments and in the stream: 1 exchange with atmospheric CO2, 2 degradation of organic matter, 3 dissolution of carbonates, and 4 tributaries. The contributions of these inputs were calculated according to steady state equations and are estimated to be -11 %: 19 %: 31 %: 61 % in the autumn and 0 %: 6 %: 9 %: 35 % in the spring sampling seasons.

  7. Climate change characteristics of Amur River

    Directory of Open Access Journals (Sweden)

    Lan-lan YU

    2013-04-01

    Full Text Available Unusually severe weather is occurring more frequently due to global climate change. Heat waves, rainstorms, snowstorms, and droughts are becoming increasingly common all over the world, threatening human lives and property. Both temperature and precipitation are representative variables usually used to directly reflect and forecast the influences of climate change. In this study, daily data (from 1953 to 1995 and monthly data (from 1950 to 2010 of temperature and precipitation in five regions of the Amur River were examined. The significance of changes in temperature and precipitation was tested using the Mann-Kendall test method. The amplitudes were computed using the linear least-squares regression model, and the extreme temperature and precipitation were analyzed using hydrological statistical methods. The results show the following: the mean annual temperature increased significantly from 1950 to 2010 in the five regions, mainly due to the warming in spring and winter; the annual precipitation changed significantly from 1950 to 2010 only in the lower mainstream of the Amur River; the frequency of extremely low temperature events decreased from 1953 to 1995 in the mainstream of the Amur River; the frequency of high temperature events increased from 1953 to 1995 in the mainstream of the Amur River; and the frequency of extreme precipitation events did not change significantly from 1953 to 1995 in the mainstream of the Amur River. This study provides a valuable theoretical basis for settling disputes between China and Russia on sustainable development and utilization of water resources of the Amur River.

  8. Climate change characteristics of Amur River

    Institute of Scientific and Technical Information of China (English)

    Lan-lan YU; Zi-qiang XIA; Jing-ku LI; Tao CAI

    2013-01-01

    Unusually severe weather is occurring more frequently due to global climate change. Heat waves, rainstorms, snowstorms, and droughts are becoming increasingly common all over the world, threatening human lives and property. Both temperature and precipitation are representative variables usually used to directly reflect and forecast the influences of climate change. In this study, daily data (from 1953 to 1995) and monthly data (from 1950 to 2010) of temperature and precipitation in five regions of the Amur River were examined. The significance of changes in temperature and precipitation was tested using the Mann-Kendall test method. The amplitudes were computed using the linear least-squares regression model, and the extreme temperature and precipitation were analyzed using hydrological statistical methods. The results show the following:the mean annual temperature increased significantly from 1950 to 2010 in the five regions, mainly due to the warming in spring and winter;the annual precipitation changed significantly from 1950 to 2010 only in the lower mainstream of the Amur River;the frequency of extremely low temperature events decreased from 1953 to 1995 in the mainstream of the Amur River;the frequency of high temperature events increased from 1953 to 1995 in the mainstream of the Amur River; and the frequency of extreme precipitation events did not change significantly from 1953 to 1995 in the mainstream of the Amur River. This study provides a valuable theoretical basis for settling disputes between China and Russia on sustainable development and utilization of water resources of the Amur River.

  9. Migration of radionuclides through a river system

    Energy Technology Data Exchange (ETDEWEB)

    Matsunaga, Takeshi [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

    1999-03-01

    Migration behavior of several atmospherically-derived radionuclides in a river watershed was studied. A main interest was in their relocation from the ground soil of the watershed to a downstream region through a river. Studied radionuclides are: {sup 137}Cs generated by weapon tests in the atmosphere; {sup 210}Pb and {sup 7}Be of naturally occurring radionuclides; {sup 137}Cs, {sup 90}Sr, {sup 239,240}Pu and {sup 241}Am released by the Chernobyl nuclear power plant accident. Dominance of the form in suspended solid in river water (particulate form) was qualified for the radionuclides in the Kuji river watershed. An importance of discharge in flooding was also confirmed. A historical budget analysis for weapon test derived {sup 137}Cs was presented for the Hi-i river watershed and its accompanied lake sediment (Lake Shinji). The work afforded a scheme of a fate of {sup 137}Cs after falling on the ground soil and on the lake surface. Several controlling factors, which can influence on the chemical form of radionuclides discharged to a river, were also investigated in the vicinity of the Chernobyl nuclear power plant. A special attention was paid on the association of the radionuclides with dissolved species in water. Preferential association of Pu and Am isotopes to a large molecular size of dissolved matrices, probably of humic substances, was suggested. (author)

  10. Assessment of River Habitat Quality in the Hai River Basin, Northern China

    Directory of Open Access Journals (Sweden)

    Yuekui Ding

    2015-09-01

    Full Text Available We applied a river habitat quality (RHQ assessment method to the Hai River Basin (HRB; an important economic centre in China; to obtain baseline information for water quality improvement; river rehabilitation; and watershed management. The results of the assessment showed that the river habitat in the HRB is seriously degraded. Specifically; 42.41% of the sites; accounting for a river length of 3.31 × 104 km; were designated poor and bad. Habitat in the plain areas is seriously deteriorated; and nearly 50% of the sites; accounting for a river length of 1.65 × 104 km; had either poor or bad habitats. River habitat degradation was attributable to the limited width of the riparian zone (≤5 m; lower coverage of riparian vegetation (≤40%; artificial land use patterns (public and industrial land; frequent occurrence of farming on the river banks and high volumes of solid waste (nearly 10 m3; single flow channels; and rare aquatic plants (≤1 category. At the regional scale; intensive artificial land use types caused by urbanization had a significant impact on the RHQ in the HRB. RHQ was significantly and negatively correlated with farmland (r = 1.000; p < 0.01 and urban land (r = 0.998; p < 0.05; and was significantly and positively correlated with grassland and woodland (r = 1.000; p < 0.01. Intensive artificial land use; created through urbanization processes; has led to a loss of the riparian zone and its native vegetation; and has disrupted the lateral connectivity of the rivers. The degradation of the already essentially black rivers is exacerbated by poor longitudinal connectivity (index of connectivity is 2.08–16.56; caused by reservoirs and sluices. For river habitat rehabilitation to be successful; land use patterns need to be changed and reservoirs and sluices will have to be regulated.

  11. RiverML: Standardizing the Communication of River Model Data (Invited)

    Science.gov (United States)

    Jackson, S.; Maidment, D. R.; Arctur, D. K.

    2013-12-01

    RiverML is a proposed language for conveying a description of river channel and floodplain geometry and flow characteristics through the internet in a standardized way. A key goal of the RiverML project is to allow interoperability between all hydraulic and hydrologic models, whether they are industry standard software packages or custom-built research tools. By providing a common transfer format for common model inputs and outputs, RiverML can shorten the development time and enhance the immediate utility of innovative river modeling tools. RiverML will provide descriptions of cross sections and multiple flow lines, allowing the construction of wireframe representations. In addition, RiverML will support descriptions of network connectivity, properties such as roughness coefficients, and time series observations such as water surface elevation and flow rate. The language is constructed in a modular fashion such that the geometry information, network information, and time series observations can be communicated independently of each other, allowing an arbitrary suite of software packages to contribute to a coherently modeled scenario. Funding for the development of RiverML is provided through an NSF grant to CUAHSI HydroShare project, a web-based collaborative environment for sharing data & models. While RiverML is geared toward the transfer of data, HydroShare will serve as a repository for storing water-related data and models of any format, while providing enhanced functionality for standardized formats such as RiverML, WaterML, and shapefiles. RiverML is a joint effort between the CUAHSI HydroShare development team, the Open Geospatial Consortium (OGC) Hydrology Domain Working Group, and an international community of data providers, data users, and software developers.

  12. Microbial Water Pollution of Drin River in Scutary Area, Albania

    Directory of Open Access Journals (Sweden)

    LINDITA BUSHATI

    2014-06-01

    Full Text Available Black Drin River joining White Drin and some other small rivers form the longest river of Albania, Drin River, 335 Km long. Drin has two distributaries, one of which empties directly into Adriatic Sea and the other one into Buna river, in Scutary (Shkoder. The Drin area is beautiful and very important for the Albanian economy, for the electricity and has a large agriculture activity as well. Unfortunately mismanagement of agricultural practices and the discharge of industrial and urban wastes into the river are causing a high pollution. River conservation is threatened by pollution. Drin river water is used by people for fishing, swimming and irrigation of plants and the pollution of this river is a problematic issue in environment and human health. We monitored microbial and chemical water pollution of Scutary area of Drin, where Drin goes into Bojana, during 2012-2013 and a high water pollution level was recorded.

  13. River ice jams at bridges

    Energy Technology Data Exchange (ETDEWEB)

    Sullivan, D. [New Brunswick Dept. of Transportation, Fredericton, NB (Canada); Beltaos, S. [National Water Research Institute, Burlington, ON (Canada)

    2000-12-01

    Ice jamming, known to cause high water levels at even moderate river flows, is described as both the main and least understood source of ice-related bridge damages. This paper describes a joint study by the New Brunswick Department of Transportation, the Department of the Environment, local governments, and the National Water Research Institute, designed to address problems associated with the interaction of ice jams and bridges. The study consists of collecting information at each of four sites in New Brunswick including: historical data on ice jam locations, causes, and water levels; channel bathymetry, width and slope within each study centred at the respective bridge; and documentation of ice conditions throughout the ice season, including measurement of ice cover thickness, observation of breakup mechanisms, times, causes, characteristics and possible impacts of ice jam release. Data analysis will include determination of high stages due to ice jams or surges caused by upstream ice jam releases, scour potential of surges, and quantification of the structure's capacity to restrain ice movement and to cause jams. The principal objective of the study is to advance beyond empiricism and to develop rational design criteria for bridges by anticipating the effects of climate changes and by incorporating local meteorological and hydrometric records into bridge design for added safety.

  14. International Alligator Rivers Analog Project

    Energy Technology Data Exchange (ETDEWEB)

    Bichard, G.F.

    1988-01-01

    The Australian Nuclear Science and Technology Organization (ANSTO), the Japan Atomic Energy Research Institute, the Swedish Nuclear Power Inspectorate, the U.K. Department of the Environment, the US Nuclear Regulatory Commission (NRC), and the Power Reactor and Nuclear Fuel Development Corporation of Japan are participating under the aegis of the Nuclear Energy Agency in the International Alligator Rivers Analog Project. The project has a duration of 3 yr, starting in 1988. The project has grown out of a research program on uranium ore bodies as analogs of high-level waste (HLW) repositories undertaken by ANSTO supported by the NRC. A primary objective of the project is to develop an approach to radionuclide transport model validation that may be used by the participants to support assessments of the safety of radioactive waste repositories. The approach involves integrating mathematical and physical modeling with hydrological and geochemical field and laboratory investigations of the analog site. The Koongarra uranium ore body has been chosen as the analog site because it has a secondary ore body that has formed over the past million years as a result of leaching by groundwater flowing through fractures in the primary ore body.

  15. Savannah River Site computing architecture

    Energy Technology Data Exchange (ETDEWEB)

    1991-03-29

    A computing architecture is a framework for making decisions about the implementation of computer technology and the supporting infrastructure. Because of the size, diversity, and amount of resources dedicated to computing at the Savannah River Site (SRS), there must be an overall strategic plan that can be followed by the thousands of site personnel who make decisions daily that directly affect the SRS computing environment and impact the site's production and business systems. This plan must address the following requirements: There must be SRS-wide standards for procurement or development of computing systems (hardware and software). The site computing organizations must develop systems that end users find easy to use. Systems must be put in place to support the primary function of site information workers. The developers of computer systems must be given tools that automate and speed up the development of information systems and applications based on computer technology. This document describes a proposal for a site-wide computing architecture that addresses the above requirements. In summary, this architecture is standards-based data-driven, and workstation-oriented with larger systems being utilized for the delivery of needed information to users in a client-server relationship.

  16. Savannah River Site computing architecture

    Energy Technology Data Exchange (ETDEWEB)

    1991-03-29

    A computing architecture is a framework for making decisions about the implementation of computer technology and the supporting infrastructure. Because of the size, diversity, and amount of resources dedicated to computing at the Savannah River Site (SRS), there must be an overall strategic plan that can be followed by the thousands of site personnel who make decisions daily that directly affect the SRS computing environment and impact the site`s production and business systems. This plan must address the following requirements: There must be SRS-wide standards for procurement or development of computing systems (hardware and software). The site computing organizations must develop systems that end users find easy to use. Systems must be put in place to support the primary function of site information workers. The developers of computer systems must be given tools that automate and speed up the development of information systems and applications based on computer technology. This document describes a proposal for a site-wide computing architecture that addresses the above requirements. In summary, this architecture is standards-based data-driven, and workstation-oriented with larger systems being utilized for the delivery of needed information to users in a client-server relationship.

  17. Freedom space for rivers: a sustainable management approach to enhance river resilience.

    Science.gov (United States)

    Biron, Pascale M; Buffin-Bélanger, Thomas; Larocque, Marie; Choné, Guénolé; Cloutier, Claude-André; Ouellet, Marie-Audray; Demers, Sylvio; Olsen, Taylor; Desjarlais, Claude; Eyquem, Joanna

    2014-11-01

    River systems are increasingly under stress and pressure from agriculture and urbanization in riparian zones, resulting in frequent engineering interventions such as bank stabilization or flood protection. This study provides guidelines for a more sustainable approach to river management based on hydrogeomorphology concepts applied to three contrasted rivers in Quebec (Canada). Mobility and flooding spaces are determined for the three rivers, and three levels of "freedom space" are subsequently defined based on the combination of the two spaces. The first level of freedom space includes very frequently flooded and highly mobile zones over the next 50 years, as well as riparian wetlands. It provides the minimum space for both fluvial and ecological functionality of the river system. On average for the three studied sites, this minimum space was approximately 1.7 times the channel width, but this minimum space corresponds to a highly variable width which must be determined from a thorough hydrogeomorphic assessment and cannot be predicted using a representative average. The second level includes space for floods of larger magnitude and provides for meanders to migrate freely over a longer time period. The last level of freedom space represents exceptional flood zones. We propose the freedom space concept to be implemented in current river management legislation because it promotes a sustainable way to manage river systems, and it increases their resilience to climate and land use changes in comparison with traditional river management approaches which are based on frequent and spatially restricted interventions.

  18. 75 FR 32852 - Navy River Swim Special Local Regulation; Lower Mississippi River, Walls, MS

    Science.gov (United States)

    2010-06-10

    ... SECURITY Coast Guard 33 CFR Part 100 RIN 1625-AA08 Navy River Swim Special Local Regulation; Lower... protect persons and vessels from the potential safety hazards associated with an event involving a swim... immediate action is needed to protect the participants in the Mississippi River swim, spectators, and...

  19. Handling sediments in Dutch river management: The planning stage of the Maaswerken river widening project

    NARCIS (Netherlands)

    Meulen, M.J. van der; Rijnveld, M.; Gerrits, L.M.; Joziasse, J.; Heijst, M.W.I.M. van; Gruijters, S.H.L.L.

    2006-01-01

    Goals, Scope and Background. Faced with higher peak discharges in the foreseeable future, the Dutch government has decided to increase the discharge capacities of the Dutch Rhine and Meuse rivers. Instead of raising the dikes, river widening measures are to be undertaken, in and along the riverbed.

  20. 78 FR 18277 - Special Local Regulation; Low Country Splash, Wando River, Cooper River, and Charleston Harbor...

    Science.gov (United States)

    2013-03-26

    ... ensure safety of life on the navigable water of the United States during the Low Country Splash. C... persons and vessels, except those participating in the Low Country Splash or serving as safety vessels are...; Low Country Splash, Wando River, Cooper River, and Charleston Harbor, Charleston, SC AGENCY:...

  1. 78 FR 28492 - Special Local Regulation; Low Country Splash, Wando River, Cooper River, and Charleston Harbor...

    Science.gov (United States)

    2013-05-15

    ... SECURITY Coast Guard 33 CFR Part 100 RIN 1625-AA08 Special Local Regulation; Low Country Splash, Wando... Wando River, Cooper River, and Charleston Harbor in Charleston, South Carolina during the Low Country Splash on June 1, 2013. This special local regulation is necessary to ensure the safety of...

  2. Erosion of river banks along the Paraná de las Palmas River, Argentina

    NARCIS (Netherlands)

    Den Bieman, J.; Van den Koppel, M.; Van Velzen, G.; Verbruggen, W.

    2010-01-01

    One of the branches of the Paraná delta is the Paraná de las Palmas River. This branch doesn’t have the biggest discharge but has the most navigation. The situation in the Paraná de las Palmas isn’t without problems though; the river banks show erosion over the whole length of the branch. This erosi

  3. Effect of Upper Zab River Confluence Point on The Quality Characteristics of Tigris River Water

    Directory of Open Access Journals (Sweden)

    Mohamed Saeed

    2013-05-01

    Full Text Available Many sources play a significant role in changing the Tigris river water quality within Iraqi territory, such as the river's tributaries receiving points, impounding like Mosul dam, the residential settlements as Mosul city, and the untreated discharge of agricultural activities.The First river tributary is Khabbor which confluences the Tigris River at Feshkhaboor village, near the Iraqi-Turkish borders. The second one is Upper Zab which meeting the river at Mishraq, 45 Km south of Mosul. Upper Zab Tributary is characterized by high discharges rates, and high pollution content. The study aim to evaluate its effect on the Tigris river water quality.The Study revealed that the Upper Zab river has  buffering capacity that polishes or enhances the Tigris river water characteristics, with an adverse effect for the others. For example, the values increased by 6% for pH, 56% for Dissolved oxygen, and 134.5% for alkalinity, Whereas the other characteristics decreased by 27.7% for electrical conductivity, 23.6% for total solids, 40% for suspended solids,16.5% for calcium ion, 20% for chloride, 33% for sulfate, 50% for chemical oxygen demand, and 6% for biological oxygen demand.  

  4. Bioassessments to detect changes in Pacific Northwest river fish assemblages: A Malheur River case study

    Science.gov (United States)

    The EPA’s Environmental Monitoring and Assessment Program large-river assessment protocol was applied to assess the ecological condition, major stressors, and likely human disturbances of the mainstem Malheur River, OR. We used inflatable rafts to allow launching and retrieving ...

  5. An Evaluation of River Health for the Weihe River in Shaanxi Province, China

    Directory of Open Access Journals (Sweden)

    Jinxi Song

    2015-01-01

    Full Text Available Excessive socioeconomic activities in the Weihe River region have caused severe ecosystem degradation, and the call for the recovery and maintenance of the river health has drawn great attention. Based on the connotation of river health, previous research findings, and status quo of the Weihe River ecosystem, in this study, we developed a novel health evaluation index system to quantitatively determine the health of the Weihe River in Shaanxi Province. The river in the study area was divided into five reaches based on the five hydrological gauging stations, and appropriate evaluation indices for each river section were selected according to the ecological environmental functions of that section. A hybrid approach integrating analytic hierarchy process (AHP and a fuzzy synthetic evaluation method was applied to measure the river health. The results show that Linjiancun-Weijiabao reach and Weijiabao-Xianyang reach are in the “moderate” level of health and Lintong-Huaxian reach and downstream of Huaxian reach are in the “poor” health rating, whereas Xianyang-Lintong reach is in the “sick” rating. Moreover, the most sensitive factors were determined, respectively, for each reach from upper stream to lower stream in the study area.

  6. Global change impacts on river ecosystems: A high-resolution watershed study of Ebro river metabolism.

    Science.gov (United States)

    Val, Jonatan; Chinarro, David; Pino, María Rosa; Navarro, Enrique

    2016-11-01

    Global change is transforming freshwater ecosystems, mainly through changes in basin flow dynamics. This study assessed how the combination of climate change and human management of river flow impacts metabolism of the Ebro River (the largest river basin in Spain, 86,100km(2)), assessed as gross primary production-GPP-and ecosystem respiration-ER. In order to investigate the influence of global change on freshwater ecosystems, an analysis of trends and frequencies from 25 sampling sites of the Ebro river basin was conducted. For this purpose, we examined the effect of anthropogenic flow control on river metabolism with a Granger causality study; simultaneously, took into account the effects of climate change, a period of extraordinary drought (largest in past 140years). We identified periods of sudden flow changes resulting from both human management and global climate effects. From 1998 to 2012, the Ebro River basin was trending toward a more autotrophic condition indicated by P/R ratio. Particularly, the results show that floods that occurred after long periods of low flows had a dramatic impact on the respiration (i.e., mineralization) capacity of the river. This approach allowed for a detailed characterization of the relationships between river metabolism and drought impacts at the watershed level. These findings may allow for a better understanding of the ecological impacts provoked by flow management, thus contributing to maintain the health of freshwater communities and ecosystem services that rely on their integrity.

  7. 33 CFR 165.903 - Safety Zones: Cuyahoga River and Old River, Cleveland, OH.

    Science.gov (United States)

    2010-07-01

    ... knuckle toward the upriver corner of the Nautica Stage. (7) The fender on the west bank of the river at 41... hundred seventy (270) foot section on the east bank of the river between the Columbus Road bridge (41..., which is the end of the chain link fence between The Club Mega and Shippers C & D. (b)...

  8. River Water Quality Zoning: A Case Study of Karoon and Dez River System

    Directory of Open Access Journals (Sweden)

    M Karamouz, N Mahjouri, R Kerachian

    2004-10-01

    Full Text Available Karoon-Dez River basin, with an area of 67000 square kilometers, is located in southern part of Iran. This river system supplies the water demands of 16 cities, several villages, thousands hectares of agricultural lands, and several hydropower plants. The increasing water demands at the project development stage including agricultural networks, fish hatchery projects, and inter-basin water transfers, have caused a gloomy future for water quality of the Karoon and Dez Rivers. A good part of used agricultural water, which is about 8040 million cubic meters, is returned to the rivers through agricultural drainage systems or as non-point, return flows. River water quality zoning could provide essential information for developing river water quality management policies. In this paper, a methodology is presented for this purpose using methods of -mean crisp classification and a fuzzy clustering scheme. The efficiency of these clustering methods was evaluated using water quality data gathered from the monitoring sampling points along Karoon and Dez Rivers. The results show that the proposed methodology can provide valuable information to support decision-making and to help river water quality management in the region.

  9. 75 FR 33690 - Safety Zone, Lights on the River Fireworks Display, Delaware River, New Hope, PA

    Science.gov (United States)

    2010-06-15

    ..., Delaware River, New Hope, PA AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard is establishing a temporary safety zone on the Delaware River in New Hope, PA. The safety zone... downriver of the bridge in New Hope, PA. DATES: This rule is effective from June 15, 2010 through July...

  10. Bank retreat study of a meandering river reach case study: River Irwell

    NARCIS (Netherlands)

    Duran, R.; Beevers, L.; Crosato, A.; Wright, N.

    2010-01-01

    Lack of data is often considered a limitation when undertaking morphological studies. This research deals with morphological studies of small rivers experiencing bank erosion processes when only limited data are available. A reach of the meandering gravel-bed river Irwell (United Kingdom) is taken

  11. Denitrification in the Mississippi River network controlled by flow through river bedforms

    Science.gov (United States)

    Gomez-Velez, Jesus D.; Harvey, Judson W.; Cardenas, M. Bayani; Kiel, Brian

    2015-12-01

    Increasing nitrogen concentrations in the world's major rivers have led to over-fertilization of sensitive downstream waters. Flow through channel bed and bank sediments acts to remove riverine nitrogen through microbe-mediated denitrification reactions. However, little is understood about where in the channel network this biophysical process is most efficient, why certain channels are more effective nitrogen reactors, and how management practices can enhance the removal of nitrogen in regions where water circulates through sediment and mixes with groundwater--hyporheic zones. Here we present numerical simulations of hyporheic flow and denitrification throughout the Mississippi River network using a hydrogeomorphic model. We find that vertical exchange with sediments beneath the riverbed in hyporheic zones, driven by submerged bedforms, has denitrification potential that far exceeds lateral hyporheic exchange with sediments alongside river channels, driven by river bars and meandering banks. We propose that geomorphic differences along river corridors can explain why denitrification efficiency varies between basins in the Mississippi River network. Our findings suggest that promoting the development of permeable bedforms at the streambed--and thus vertical hyporheic exchange--would be more effective at enhancing river denitrification in large river basins than promoting lateral exchange through induced channel meandering.

  12. Field intercomparison of channel master ADCP with RiverSonde Radar for measuring river discharge

    Science.gov (United States)

    Spain, P.; Marsden, R.; Barrick, D.; Teague, C.; Ruhl, C.

    2005-01-01

    The RiverSonde radar makes non-contact measurement of a horizontal swath of surface velocity across a river section. This radar, which has worked successfully at several rivers in the Western USA, has shown encouraging correlation with simultaneous measurements of average currents at one level recorded by an acoustic travel-time system. This work reports a field study intercomparing data sets from a 600 kHz Channel Master ADCP with the RiverSonde radar. The primary goal was to begin to explore the robustness of the radar data as a reliable index of discharge. This site Is at Three Mile Slough in Northern California, USA. The larger intent of the work is to examine variability in space and time of the radar's surface currents compared with subsurface flows across the river section. Here we examine data from a couple of periods with strong winds. ?? 2005 IEEE.

  13. Hydrology and morphology of two river mouth regions (temperate Vistula Delta and subtropical Red River Delta

    Directory of Open Access Journals (Sweden)

    Zbigniew Pruszak

    2005-09-01

    Full Text Available The paper presents a comparative analysis of two different river mouths from two different geographical zones (subtropical and temperate climatic regions. One is the multi-branch and multi-spit mouth of the Red River on the Gulf of Tonkin (Vietnam, the other is the smaller delta of the river Vistula on a bay of the Baltic Sea (Poland. The analysis focuses on the similarities and differences in the hydrodynamics between these estuaries and the adjacent coastal zones, the features of sediment transport, and the long-term morphodynamics of the river outlets. Salinity and water level are also discussed, the latter also in the context of the anticipated global effect of accelerated sea level rise. The analysis shows that the climatic and environmental conditions associated with geographical zones give rise to fundamental differences in the generation and dynamic evolution of the river mouths.

  14. River and Reservoir Operations Model, Truckee River basin, California and Nevada, 1998

    Science.gov (United States)

    Berris, Steven N.; Hess, Glen W.; Bohman, Larry R.

    2001-01-01

    The demand for all uses of water in the Truckee River Basin, California and Nevada, commonly is greater than can be supplied. Storage reservoirs in the system have a maximum effective total capacity equivalent to less than two years of average river flows, so longer-term droughts can result in substantial water-supply shortages for irrigation and municipal users and may stress fish and wildlife ecosystems. Title II of Public Law (P.L.) 101-618, the Truckee?Carson?Pyramid Lake Water Rights Settlement Act of 1990, provides a foundation for negotiating and developing operating criteria, known as the Truckee River Operating Agreement (TROA), to balance interstate and interbasin allocation of water rights among the many interests competing for water from the Truckee River. In addition to TROA, the Truckee River Water Quality Settlement Agreement (WQSA), signed in 1996, provides for acquisition of water rights to resolve water-quality problems during low flows along the Truckee River in Nevada. Efficient execution of many of the planning, management, or environmental assessment requirements of TROA and WQSA will require detailed water-resources data coupled with sound analytical tools. Analytical modeling tools constructed and evaluated with such data could help assess effects of alternative operational scenarios related to reservoir and river operations, water-rights transfers, and changes in irrigation practices. The Truckee?Carson Program of the U.S. Geological Survey, to support U.S. Department of the Interior implementation of P.L. 101-618, is developing a modeling system to support efficient water-resources planning, management, and allocation. The daily operations model documented herein is a part of the modeling system that includes a database management program, a graphical user interface program, and a program with modules that simulate river/reservoir operations and a variety of hydrologic processes. The operations module is capable of simulating lake

  15. Annual cycle in lakes and rivers from CryoSat-2 altimetry — The Brahmaputra river

    DEFF Research Database (Denmark)

    Villadsen, Heidi; Andersen, Ole Baltazar; Stenseng, Lars

    2014-01-01

    A key concern of the CryoSat-2 orbit has been its long repeat period of 369 days, which is usually undesirable for river and lake monitoring. However, the results of this study show that CryoSat-2 data can indeed be used for such monitoring by utilizing the high spatial coverage and the sub......-cycle period of 30 days. The performance of CryoSat-2/SIRAL altimetry for river level monitoring is investigated by studying river levels retrieved from Ganges and Brahmaputra. An evaluation of CryoSat-2 river levels from LRM, SAR and SARIn data is performed by comparing with Envisat data from the period...... data to continue river level archives from satellite radar altimetry....

  16. Coexistence of fisheries with river dolphin conservation.

    Science.gov (United States)

    Kelkar, Nachiket; Krishnaswamy, Jagdish; Choudhary, Sunil; Sutaria, Dipani

    2010-08-01

    Freshwater biodiversity conservation is generally perceived to conflict with human use and extraction (e.g., fisheries). Overexploited fisheries upset the balance between local economic needs and endangered species' conservation. We investigated resource competition between fisheries and Ganges river dolphins (Platanista gangetica gangetica) in a human-dominated river system in India to assess the potential for their coexistence. We surveyed a 65-km stretch of the lower Ganga River to assess habitat use by dolphins (encounter rates) and fishing activity (habitat preferences of fishers, intensity of net and boat use). Dolphin abundance in the main channel increased from 179 (SE 7) (mid dry season) to 270 (SE 8) (peak dry season), probably as a result of immigration from upstream tributaries. Dolphins preferred river channels with muddy, rocky substrates, and deep midchannel waters. These areas overlapped considerably with fishing areas. Sites with 2-6 boats/km (moderately fished) were more preferred by dolphins than sites with 8-55 boats/km (heavily fished). Estimated spatial (85%) and prey-resource overlap (75%) between fisheries and dolphins (chiefly predators of small fish) suggests a high level of competition between the two groups. A decrease in abundance of larger fish, indicated by the fact that small fish comprised 74% of the total caught, may have intensified the present competition. Dolphins seem resilient to changes in fish community structure and may persist in overfished rivers. Regulated fishing in dolphin hotspots and maintenance of adequate dry season flows can sustain dolphins in tributaries and reduce competition in the main river. Fish-stock restoration and management, effective monitoring, curbing destructive fishing practices, secure tenure rights, and provision of alternative livelihoods for fishers may help reconcile conservation and local needs in overexploited river systems.

  17. RiverHeath: Neighborhood Loop Geothermal Exchange System

    Energy Technology Data Exchange (ETDEWEB)

    Geall, Mark [RiverHeath LLC, Appleton, WI (United States)

    2016-07-11

    The goal of the RiverHeath project is to develop a geothermal exchange system at lower capital infrastructure cost than current geothermal exchange systems. The RiverHeath system features an innovative design that incorporates use of the adjacent river through river-based heat exchange plates. The flowing water provides a tremendous amount of heat transfer. As a result, the installation cost of this geothermal exchange system is lower than more traditional vertical bore systems. Many urban areas are located along rivers and other waterways. RiverHeath will serve as a template for other projects adjacent to the water.

  18. On geo-basis of river regulation-A case study for the middle reaches of the Yangtze River

    Institute of Scientific and Technical Information of China (English)

    LIU GuoWei

    2008-01-01

    From the point of view that people have to obey the river's geo-attributes in the river regulation,the definition and the meaning of the geo-attributes of a river are discussed.The geo-basis of the river regulation of the middle reaches of the Yangtze River is expounded in five aspects,including the structural geomorphol-ogy environment of flood storage and discharge,the distribution characteristics of subsidence and the sedimentation areas of Dongting Basin,the history evolution of Jianghan Basin,the function of Jianghan Basin and Dongting Basin as the flood water detention areas of Jingjiang River reach in ancient time,and the geological characteristic of Jingjiang River reach.Based on the geo-attributes of the middle reaches of the Yangtze River,some ideas about the middle reach regulation of the Yangtze River are put forward:to process the interchange between the lakes and diked marsh areas in Dongting Basin,to canal the new river route as the flood di-version channel of Jingjiang River reach with the paleo river,to recover the func-tion of Jianghan Basin as flood detention area of the middle reaches.And we should take into consideration the geo-environment of the whole Yangtze River in the river regulation of middle reaches.

  19. Morphological, hydrological, biogeochemical and ecological changes and challenges in river restoration - the Thur River case study

    Science.gov (United States)

    Schirmer, M.; Luster, J.; Linde, N.; Perona, P.; Mitchell, E. A. D.; Barry, D. A.; Hollender, J.; Cirpka, O. A.; Schneider, P.; Vogt, T.; Radny, D.; Durisch-Kaiser, E.

    2014-06-01

    River restoration can enhance river dynamics, environmental heterogeneity and biodiversity, but the underlying processes governing the dynamic changes need to be understood to ensure that restoration projects meet their goals, and adverse effects are prevented. In particular, we need to comprehend how hydromorphological variability quantitatively relates to ecosystem functioning and services, biodiversity as well as ground- and surface water quality in restored river corridors. This involves (i) physical processes and structural properties, determining erosion and sedimentation, as well as solute and heat transport behavior in surface water and within the subsurface; (ii) biogeochemical processes and characteristics, including the turnover of nutrients and natural water constituents; and (iii) ecological processes and indicators related to biodiversity and ecological functioning. All these aspects are interlinked, requiring an interdisciplinary investigation approach. Here, we present an overview of the recently completed RECORD (REstored CORridor Dynamics) project in which we combined physical, chemical, and biological observations with modeling at a restored river corridor of the perialpine Thur River in Switzerland. Our results show that river restoration, beyond inducing morphologic changes that reshape the river bed and banks, triggered complex spatial patterns of bank infiltration, and affected habitat type, biotic communities and biogeochemical processes. We adopted an interdisciplinary approach of monitoring the continuing changes due to restoration measures to address the following questions: How stable is the morphological variability established by restoration? Does morphological variability guarantee an improvement in biodiversity? How does morphological variability affect biogeochemical transformations in the river corridor? What are some potential adverse effects of river restoration? How is river restoration influenced by catchment-scale hydraulics

  20. Suitability Evaluation on River Bank Filtration of the Second Songhua River, China

    Science.gov (United States)

    Wang, Lixue; Ye, Xueyan; Du, Xinqiang

    2016-04-01

    The Second Songhua River is the biggest river with the most economic value in Jilin Province, China. In recent years, with the rapid development of economy, water resources and water environment problem is getting prominent, including surface water pollution and over exploitation of groundwater resources, etc. By means of bank filtration, the Second Songhua River basin might realize the combined utilization of regional groundwater and surface water, and thus has important significance for the guarantee of water demand for industrial and agricultural production planning in the basin. The following steps were adopted to evaluate the suitability of bank filtration nearby the Scond Songhua River : Firstly, in order to focus on the most possible area, the evaluation area was divided based on the aspects of natural geographical conditions and hydraulic connection extent between river water and groundwater. Second, the main suitability indexes including water quantity, water quality, interaction intensity between surface water and groundwater, and the exploitation condition of groundwater resource, and nine sub-indexes including hydraulic conductivity, aquifer thickness, river runoff, the status of groundwater quality, the status of surface water quality, groundwater hydraulic gradient, possible influence zone width of surface water under the condition of groundwater exploitation, permeability of riverbed layer and groundwater depth were proposed to establish an evaluation index system for the suitability of river bank filtration. Thirdly, Combined with the natural geography, geology and hydrogeology conditions of the Second Songhua River basin, the ArcGIS technology is used to complete the evaluation of the various indicators. According to the weighted sum of each index, the suitability of river bank filtration in the study area is divided into five grades. The evaluation index system and evaluation method established in this article are applicable to the Second Songhua

  1. Coho Salmon Master Plan, Clearwater River Basin.

    Energy Technology Data Exchange (ETDEWEB)

    Nez Perce Tribe; FishPro

    2004-10-01

    The Nez Perce Tribe has a desire and a goal to reintroduce and restore coho salmon to the Clearwater River Subbasin at levels of abundance and productivity sufficient to support sustainable runs and annual harvest. Consistent with the Clearwater Subbasin Plan (EcoVista 2003), the Nez Perce Tribe envisions developing an annual escapement of 14,000 coho salmon to the Clearwater River Subbasin. In 1994, the Nez Perce Tribe began coho reintroduction by securing eggs through U.S. v. Oregon; by 1998 this agreement provided an annual transfer of 550,000 coho salmon smolts from lower Columbia River hatchery facilities for release in the Clearwater River Subbasin. In 1998, the Northwest Power and Conservation Council authorized the Bonneville Power Administration to fund the development of a Master Plan to guide this reintroduction effort. This Master Plan describes the results of experimental releases of coho salmon in the Clearwater River Subbasin, which have been ongoing since 1995. These data are combined with results of recent coho reintroduction efforts by the Yakama Nation, general coho life history information, and historical information regarding the distribution and life history of Snake River coho salmon. This information is used to assess a number of alternative strategies aimed at restoring coho salmon to historical habitats in the Clearwater River subbasin. These data suggest that there is a high probability that coho salmon can be restored to the Clearwater River subbasin. In addition, the data also suggest that the re-establishment of coho salmon could be substantially aided by: (1) the construction of low-tech acclimation facilities; (2) the establishment of a 'localized' stock of coho salmon; and (3) the construction of hatchery facilities to provide a source of juvenile coho salmon for future supplementation activities. The Nez Perce Tribe recognizes that there are factors which may limit the success of coho reintroduction. As a result of these

  2. Critical pollution levels in Umguza River, Zimbabwe

    Science.gov (United States)

    Chinyama, A.; Ncube, R.; Ela, W.

    2016-06-01

    In most countries worldwide regulatory bodies set effluent discharge limits into rivers and other natural water bodies. These limits specify the maximum permissible concentration of defined pollutants that may be discharged into the water body. This limit is conceptually based on the self-purification (assimilative) capacity of the receiving water. However, this self-purification constant is itself a function of the water's pollutant loading. Umguza River situated south west of Zimbabwe, is fed by tributaries that drain an urban catchment and as such is prone to pollution due to human activities in the catchment. This study investigated the levels of pollution in Umguza River that would affect its self-purification capacity. This was achieved by characterising the spatial distribution of a selected range of water quality parameters as well as determining the self-purification capacity of a stretch of the river. Critical pollutant concentrations were determined for some of the parameters that showed high values along the stretch. The selected parameters of interest were dissolved oxygen, suspended solids, phosphates, nitrates, COD, turbidity, ammonia, pH, alkalinity and temperature. The study was carried out from January 2014 to April 2014. The self-purification capacity was determined using a formula that compares the mass flux of a pollutant upstream and downstream of the selected stretch of the river. Statistical analysis was used to establish relationships between the pollutants and the self-purification capacity of the river. The study found that the levels of ammonia and phosphates were very high compared to the regulated limits (2 mg/l vs 0.5 mg/l; and 8 mg/l vs 0.5 mg/l respectively). It was also found that the self-purification capacity varied significantly across pollutants. It was therefore concluded that a critical pollutant concentration exists above which the river completely loses its natural ability to assimilate and decrease its pollutant load over

  3. Columbia River impact evaluation plan

    Energy Technology Data Exchange (ETDEWEB)

    1993-06-01

    As a result of past practices, four areas of the Hanford Site (the 100, 200, 300, and 1100 Areas) have been included on the US Environmental Protection Agency`s (EPA`s) National Priorities List (NPL) under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980. To accomplish the timely cleanup of the past-practice units, the Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement), was signed by the Washington State Department of Ecology (Ecology), EPA, and the US Department of Energy (DOE). To support the Tri-Party Agreement, milestones were adopted. These milestones represent the actions needed to ensure acceptable progress toward Hanford Site compliance with CERCLA, RCRA, and the Washington State Hazardous Waste Management Act of 1976. This report was prepared to fulfill the requirement of Tri-Party Agreement Milestone M-30-02, which requires a plan to determine cumulative health and environmental impacts to the Columbia River. This plan supplements the CERCLA remedial investigations/feasibility studies (RI/FS) and RCRA facility investigations/corrective measures studies (RFI/CMSs) that will be undertaken in the 100 Area. To support the plan development process, existing information was reviewed and a preliminary impact evaluation based on this information was performed. The purpose of the preliminary impact evaluation was to assess the adequacy of existing data and proposed data collection activities. Based on the results of the evaluation, a plan is proposed to collect additional data or make changes to existing or proposed data collection activities.

  4. RIVER PROTECTION PROJECT SYSTEM PLAN

    Energy Technology Data Exchange (ETDEWEB)

    CERTA PJ

    2008-07-10

    The U.S. Department of Energy (DOE), Office of River Protection (ORP) manages the River Protection Project (RPP). The RPP mission is to retrieve and treat Hanford's tank waste and close the tank farms to protect the Columbia River. As a result, the ORP is responsible for the retrieval, treatment, and disposal of the approximately 57 million gallons of radioactive waste contained in the Hanford Site waste tanks and closure of all the tanks and associated facilities. The previous revision of the System Plan was issued in September 2003. ORP has approved a number of changes to the tank waste treatment strategy and plans since the last revision of this document, and additional changes are under consideration. The ORP has established contracts to implement this strategy to establish a basic capability to complete the overall mission. The current strategy for completion of the mission uses a number of interrelated activities. The ORP will reduce risk to the environment posed by tank wastes by: (1) Retrieving the waste from the single-shell tanks (SST) to double-shell tanks (DST) for treatment and disposal; (2) Constructing and operating the WTP, which will safely treat all of the high-level waste (HLW) and about half of the low-activity waste (LAW) contained in the tank farms, and maximizing its capability and capacity; (3) Developing and deploying supplemental treatment capability or a second WTP LAW Facility that can safely treat about half of the LAW contained in the tank farms; (4) Developing and deploying treatment and packaging capability for transuranic (TRU) tank waste for shipment to and disposal at the Waste Isolation Pilot Plant (WIPP); (5) Deploying interim storage capacity for the immobilized HLW and shipping that waste to Yucca Mountain for disposal; (6) Operating the Integrated Disposal Facility for the disposal of immobilized LAW, along with the associated secondary waste, (7) Closing the SST and DST tank farms, ancillary facilities, and al1 waste

  5. RIVER PROTECTION PROJECT SYSTEM PLAN

    Energy Technology Data Exchange (ETDEWEB)

    CERTA PJ; KIRKBRIDE RA; HOHL TM; EMPEY PA; WELLS MN

    2009-09-15

    The U.S. Department of Energy (DOE), Office of River Protection (ORP) manages the River Protection Project (RPP). The RPP mission is to retrieve and treat Hanford's tank waste and close the tank farms to protect the Columbia River. As a result, ORP is responsible for the retrieval, treatment, and disposal of approximately 57 million gallons 1 of radioactive waste contained in the Hanford Site waste tanks and closure2 of all the tanks and associated facilities. The previous revision of the System Plan was issued in May 2008. ORP has made a number of changes to the tank waste treatment strategy and plans since the last revision of this document, and additional changes are under consideration. ORP has contracts in place to implement the strategy for completion of the mission and establish the capability to complete the overall mission. The current strategl involves a number of interrelated activities. ORP will reduce risk to the environment posed by tank wastes by the following: (1) Retrieving the waste from the single-shell tanks (SST) to double-shell tanks (DST) and delivering the waste to the Waste Treatment and Immobilization Plant (WTP). (2) Constructing and operating the WTP, which will safely treat all of the high-level waste (HLW) fraction contained in the tank farms. About one-third of the low-activity waste (LAW) fraction separated from the HLW fraction in the WTP will be immobilized in the WTP LAW Vitrification Facility. (3) Developing and deploying supplemental treatment capability assumed to be a second LAW vitrification facility that can safely treat about two-thirds of the LAW contained in the tank farms. (4) Developing and deploying supplemental pretreatment capability currently assumed to be an Aluminum Removal Facility (ARF) using a lithium hydrotalcite process to mitigate sodium management issues. (5) Developing and deploying treatment and packaging capability for contact-handled transuranic (CH-TRU) tank waste for possible shipment to and

  6. Damodar river pollution and health hazards

    Energy Technology Data Exchange (ETDEWEB)

    Kalyan Banerjee; Raghubir Banerjee; Ajoy Sen; Mukhopadhyay, S.; Sen, A.C.; Dasarath Singh; Biswajit Mandal [Bankura Sammilani Medical College, Bankura (India)

    2003-07-01

    Damodar river started from Latehar of Chhotonagpur plateaux and ultimately ended its journey in the river Hooghly near Calcutta, West Bengal, India. After discovery of coal in this area many industries have been set up including steel plants, locomotive, paper, aluminium, glass, cement and chemical factories. To control water pollution, a water analysis centre was set up at Panchet and speed boats were deployed to locate and assess the different industrial pollution around its course. In the western course of the river it picks up waste from Sindri Fertilizer mainly of chromate, ammonia and naphthalene. From Bokaro and Chandrapura Thermal Power units, the river becomes loaded with fly ash, oil and grease. It also picks up toxic constituents from coal washeries of different collieries. The water treatment plants that are in use employ conventional methods of sedimentation, sand filtration, alum treatment and chlorination. With the rising incidence of pulmonary diseases, diarrhoea and gastroenteritis, contact dermatitis, skin cancer and bullous diseases, the Mines Board of Health, Asansol along with Director General of Mines Safety and some practicing consultants of the area, has undertaken a pilot study to assess the Damodar river pollution during lean months and the rainy season and its implication towards industrial population's health. 5 refs.

  7. Alongshore sediment bypassing as a control on river mouth morphodynamics

    Science.gov (United States)

    Nienhuis, Jaap H.; Ashton, Andrew D.; Nardin, William; Fagherazzi, Sergio; Giosan, Liviu

    2016-04-01

    River mouths, shoreline locations where fluvial and coastal sediments are partitioned via erosion, trapping, and redistribution, are responsible for the ultimate sedimentary architecture of deltas and, because of their dynamic nature, also pose great management and engineering challenges. To investigate the interaction between fluvial and littoral processes at wave-dominated river mouths, we modeled their morphologic evolution using the coupled hydrodynamic and morphodynamic model Delft3D-SWAN. Model experiments replicate alongshore migration of river mouths, river mouth spit development, and eventual spit breaching, suggesting that these are emergent phenomena that can develop even under constant fluvial and wave conditions. Furthermore, we find that sediment bypassing of a river mouth develops though feedbacks between waves and river mouth morphology, resulting in either continuous bypassing pathways or episodic bar bypassing pathways. Model results demonstrate that waves refracting into the river mouth bar create a zone of low alongshore sediment transport updrift of the river mouth, which reduces sediment bypassing. Sediment bypassing, in turn, controls the river mouth migration rate and the size of the river mouth spit. As a result, an intermediate amount of river discharge maximizes river mouth migration. The fraction of alongshore sediment bypassing can be predicted from the balance between the jet and the wave momentum flux. Quantitative comparisons show a match between our modeled predictions of river mouth bypassing and migration rates observed in natural settings.

  8. Benchmarking wide swath altimetry-based river discharge estimation algorithms for the Ganges river system

    Science.gov (United States)

    Bonnema, Matthew G.; Sikder, Safat; Hossain, Faisal; Durand, Michael; Gleason, Colin J.; Bjerklie, David M.

    2016-04-01

    The objective of this study is to compare the effectiveness of three algorithms that estimate discharge from remotely sensed observables (river width, water surface height, and water surface slope) in anticipation of the forthcoming NASA/CNES Surface Water and Ocean Topography (SWOT) mission. SWOT promises to provide these measurements simultaneously, and the river discharge algorithms included here are designed to work with these data. Two algorithms were built around Manning's equation, the Metropolis Manning (MetroMan) method, and the Mean Flow and Geomorphology (MFG) method, and one approach uses hydraulic geometry to estimate discharge, the at-many-stations hydraulic geometry (AMHG) method. A well-calibrated and ground-truthed hydrodynamic model of the Ganges river system (HEC-RAS) was used as reference for three rivers from the Ganges River Delta: the main stem of Ganges, the Arial-Khan, and the Mohananda Rivers. The high seasonal variability of these rivers due to the Monsoon presented a unique opportunity to thoroughly assess the discharge algorithms in light of typical monsoon regime rivers. It was found that the MFG method provides the most accurate discharge estimations in most cases, with an average relative root-mean-squared error (RRMSE) across all three reaches of 35.5%. It is followed closely by the Metropolis Manning algorithm, with an average RRMSE of 51.5%. However, the MFG method's reliance on knowledge of prior river discharge limits its application on ungauged rivers. In terms of input data requirement at ungauged regions with no prior records, the Metropolis Manning algorithm provides a more practical alternative over a region that is lacking in historical observations as the algorithm requires less ancillary data. The AMHG algorithm, while requiring the least prior river data, provided the least accurate discharge measurements with an average wet and dry season RRMSE of 79.8% and 119.1%, respectively, across all rivers studied. This poor

  9. Effects of human activities on the ecological processes of river biofilms in a highly urbanized river

    Science.gov (United States)

    Hung, R.; Li, M.

    2013-12-01

    Many anthropogenic disturbances and their effects of aquatic ecosystem are difficult to quantify in urbanized rivers. In past, specific taxa analysis of community structure was a common approach in river health monitoring studies. However, it is still difficult to understand stream ecosystem integrity without considering ecosystem processes. The complex species composition and metabolism of a river biofilm have the capacity to interact and/or modulate their surrounding environment. Because of their short life cycles, species richness, and worldwide distribution, structure and function of river biofilm communities are sensitive to change in environmental conditions. Therefore, biofilms are widely used as early warning systems of water pollution for water quality monitoring studies. In this study, we used river biofilms as a bioindicator by examining their extracellular enzyme activities and photosynthesis efficiency to understand human activities on the ecological processes of river ecosystem in a highly urbanized river. We sampled four sites along the Keelung River, Taiwan, based on different intensities of anthropogenic disturbances including water pollution index, population densities, land use types and types of stream habitats. Two study sites are heavily influenced by human activities and the others are not. The activities of extracellular enzymes within the biofilm play an important function for organic matter decomposition and nutrient cycling. We measured seven extracellular enzyme activities (β-d-glucosidase, phosphatase, leucine-aminopeptidase, sulfatase, peroxidase, polyphenol oxidase, and esterase) to examine specific enzyme activity changes at four study sites monthly. In addition, relative proportion of each extracellular enzyme activity on total enzyme activities was calculated in order to examine the relationship between functional biofilm profiles and different urban intensities. Among four study sites, leucine-aminopeptidase and esterase

  10. River bank geomorphology controls groundwater arsenic concentrations in aquifers adjacent to the Red River, Hanoi Vietnam

    Science.gov (United States)

    Stahl, Mason O.; Harvey, Charles F.; van Geen, Alexander; Sun, Jing; Thi Kim Trang, Pham; Mai Lan, Vi; Mai Phuong, Thao; Hung Viet, Pham; Bostick, Benjamin C.

    2016-08-01

    Many aquifers that are highly contaminated by arsenic in South and Southeast Asia are in the floodplains of large river networks. Under natural conditions, these aquifers would discharge into nearby rivers; however, large-scale groundwater pumping has reversed the flow in some areas so that rivers now recharge aquifers. At a field site near Hanoi Vietnam, we find river water recharging the aquifer becomes high in arsenic, reaching concentrations above 1000 µg/L, within the upper meter of recently (50 µg/L) aqueous arsenic concentrations are found in aquifer regions adjacent to zones where the river has recently deposited sediment and low arsenic concentrations are found in aquifer regions adjacent to erosional zones. High arsenic concentrations are even found adjacent to a depositional river reach in a Pleistocene aquifer, a type of aquifer sediment which generally hosts low arsenic water. Using geochemical and isotopic data, we estimate the in situ rate of arsenic release from riverbed sediments to be up to 1000 times the rates calculated on inland aquifer sediments in Vietnam. Geochemical data for riverbed porewater conditions indicate that the reduction of reactive, poorly crystalline iron oxides controls arsenic release. We suggest that aquifers in these regions may be susceptible to further arsenic contamination where riverine recharge drawn into aquifers by extensive groundwater pumping flows through recently deposited river sediments before entering the aquifer.

  11. Modeling mercury biomagnification (South River, Virginia, USA) to inform river management decision making.

    Science.gov (United States)

    Tom, Kyle R; Newman, Michael C; Schmerfeld, John

    2010-04-01

    Mercury trophic transfer in the South River (VA, USA) was modeled to guide river remediation decision making. Sixteen different biota types were collected at six sites within 23 river miles. Mercury biomagnification was modeled using a general biomagnification model based on delta(15)N and distance from the historic mercury release. Methylmercury trophic transfer was clearer than that for total Hg and, therefore, was used to build the predictive model (r(2) (prediction) = 0.76). The methylmercury biomagnification factors were similar among sites, but model intercept did increase with distance down river. Minimum Akaike's Information Criterion Estimation (MAICE) justified the incorporation of distance in the model. A model with a very similar biomagnification factor to the South River (95% confidence intervals [CI] = 0.38-0.52) was produced for a second contaminated Virginia river, the North Fork Holston River (95% CI = 0.41-0.55). Percent of total Hg that was methylmercury increased monotonically with trophic position. Trophic models based on delta(15)N were adequate for predicting changes in mercury concentrations in edible fish under different remediation scenarios.

  12. The effects of Thailand's Great Flood of 2011 on river sediment discharge in the upper Chao Phraya River basin, Thailand

    Institute of Scientific and Technical Information of China (English)

    Butsawan Bidorn; Seree Chanyotha; Stephen A. Kish; Joseph F. Donoghue; Komkrit Bidorn; Ruetaitip Mama

    2015-01-01

    Severe flooding that occurred during the 2011 monsoon season in Thailand was the heaviest flooding in the past 50 yr. The rainfall over the northern part of Thailand, especially during July–August 2011, was 150% higher than average. During the flooding period, river flows of the four major Chao Phraya River tributaries (Ping, Wang, Yom, and Nan rivers) increased in the range of 1.4–5 times the average discharge. This study examined the river sediment discharge of the four major rivers in the upper Chao Phraya River basin in Thailand. The four rivers are considered the main sources of sediment supply to the Chao Phraya Estuary. River surveys of the Ping, Wang, Yom, and Nan rivers were carried out in October 2011 (during the Great Flood) and October 2012 (one year after the flood). Survey data included river cross sections, flow velocities, suspended sediment concentrations, and bed load transport in each river. Analyses of these data indicated that total sediment transport rates for the four main rivers during the flooding of 2011 were 2.3–5.6 times higher than the average sediment discharge over 60 yr. The flood of 2011 sig-nificantly affected the sediment characteristics including the proportions of suspended and bed sediment loads in each river though in different ways. The rates of sediment transport per unit discharge for the Ping and Wang rivers dramatically increased during the 2011 flood, but the flooding had minimal effects on the sediment characteristics in the Yom and Nan rivers. The amount of total sediment discharge in each river caused by the 2011 flooding varied between 0.3 and 1.6 Mt. Additionally, the bed load transport in these rivers varied between ? 0%and 26%of the suspended sediment discharge.

  13. Evaluate Status of Pacific Lamprey in the Clearwater River and Salmon River Drainages, Idaho, 2009 Technical Report.

    Energy Technology Data Exchange (ETDEWEB)

    Cochnauer, Tim; Claire, Christopher [Idaho Department of Fish and Game

    2009-05-07

    Pacific lamprey Lampetra tridentata have received little attention in fishery science until recently, even though abundance has declined significantly along with other anadromous fish species in Idaho. Pacific lamprey in Idaho have to navigate over eight lower Snake River and Columbia River hydroelectric facilities for migration downstream as juveniles to the Pacific Ocean and again as adults migrating upstream to their freshwater spawning grounds in Idaho. The number of adult Pacific lamprey annually entering the Snake River basin at Ice Harbor Dam has declined from an average of over 18,000 during 1962-1969 to fewer than 600 during 1998-2006. Based on potential accessible streams and adult escapement over Lower Granite Dam on the lower Snake River, we estimate that no more than 200 Pacific lamprey adult spawners annually utilize the Clearwater River drainage in Idaho for spawning. We utilized electrofishing in 2000-2006 to capture, enumerate, and obtain biological information regarding rearing Pacific lamprey ammocoetes and macropthalmia to determine the distribution and status of the species in the Clearwater River drainage, Idaho. Present distribution in the Clearwater River drainage is limited to the lower sections of the Lochsa and Selway rivers, the Middle Fork Clearwater River, the mainstem Clearwater River, the South Fork Clearwater River, and the lower 7.5 km of the Red River. In 2006, younger age classes were absent from the Red River.

  14. On geo-basis of river regulation——A case study for the middle reaches of the Yangtze River

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    From the point of view that people have to obey the river’s geo-attributes in the river regulation, the definition and the meaning of the geo-attributes of a river are discussed. The geo-basis of the river regulation of the middle reaches of the Yangtze River is expounded in five aspects, including the structural geomorphology environment of flood storage and discharge, the distribution characteristics of subsidence and the sedimentation areas of Dongting Basin, the history evolution of Jianghan Basin, the function of Jianghan Basin and Dongting Basin as the flood water detention areas of Jingjiang River reach in ancient time, and the geological characteristic of Jingjiang River reach. Based on the geo-attributes of the middle reaches of the Yangtze River, some ideas about the middle reach regulation of the Yangtze River are put forward: to process the interchange between the lakes and diked marsh areas in Dongting Basin, to canal the new river route as the flood diversion channel of Jingjiang River reach with the paleo river, to recover the function of Jianghan Basin as flood detention area of the middle reaches. And we should take into consideration the geo-environment of the whole Yangtze River in the river regulation of middle reaches.

  15. Comparative Mountain Hydrology: A Case Study of Wis(l)ok River in Poland and Chaohe River in China

    Institute of Scientific and Technical Information of China (English)

    Leszek SOBKOWIAK; LIU Changming

    2015-01-01

    Hydrological processes in river basins of similar size and morphology may differ significantly due to different climatic conditions.This paper presents a comparative analysis of hydrological characteristics of two river basins located in different climatic zones:the Wis(l)ok River Basin in the south-eastern Poland and the Chaohe River Basin in the northern China.The criteria of their choice were similarities in the basin area,main river length and topography.The results show that climate plays a key role in shaping fluvial conditions within the two basins.It is concluded that:1) precipitation in the Wis(l)ok River Basin is more evenly distributed in the yearly cycle,while in the Chaohe River Basin it is highly concentrated in the few summer months; 2) spring snowmelt significantly contributes to runoff in the Wis(l)ok River Basin,while its role in the Chaohe River Basin is negligible; 3) in the Wis(l)ok River Basin,besides the peak flow in spring,there is also a period of high water in summer resulting from precipitation,while in the Chaohe River Basin there is only one high water period in summer; 4) the Wis(l)ok River Basin shows relatively higher stability in terms of the magnitude of intra-and inter-seasonal discharges; 5) during the multi-year observation period,a decrease in both precipitation and runoff was recorded in the two river basins.

  16. Snake and Columbia Rivers Sediment Sampling Project

    Energy Technology Data Exchange (ETDEWEB)

    Pinza, M.R.; Word, J.Q; Barrows, E.S.; Mayhew, H.L.; Clark, D.R. (Battelle/Marine Sciences Lab., Sequim, WA (United States))

    1992-12-01

    The disposal of dredged material in water is defined as a discharge under Section 404 of the Clean Water Act and must be evaluated in accordance with US Environmental Protection Agency regulation 40 CFR 230. Because contaminant loads in the dredged sediment or resuspended sediment may affect water quality or contaminant loading, the US Army Corps of Engineers (USACE), Walla Walla District, has requested Battelle/Marine Sciences Laboratory to collect and chemically analyze sediment samples from areas that may be dredged near the Port Authority piers on the Snake and Columbia rivers. Sediment samples were also collected at River Mile (RM) stations along the Snake River that may undergo resuspension of sediment as a result of the drawdown. Chemical analysis included grain size, total organic carbon, total volatile solids, ammonia, phosphorus, sulfides, oil and grease, total petroleum hydrocarbons, metals, polynuclear aromatic hydrocarbons, pesticides, polychlorinated biphenyls, and 21 congeners of polychlorinated dibenzodioxins and dibenzofurans.

  17. When and where rivers meet the sea

    Institute of Scientific and Technical Information of China (English)

    H.JesseWalker

    2001-01-01

    River mouth areas provide one of the most desired locations for human habitation. Although occupying only a small portion of the total length of the world’s shoreline, river mouths are dynamic and complex with highly variable physical and chemical characteristics.The size, shape, and position of a river’s mouth are dependent on its geologic and hydrologic history. Further, the processes that operate in a river’s mouth are affected by the sea and its currents, tides, and salinity; the river and its discharge and sediment characteristics; and wind generated waves and storm surges. Present-day locations are, geologically speaking, of recent origin because of the rise in sea level that accompanied deglaciation and the sedimentation that followed drowning.

  18. Updating river basin models with radar altimetry

    DEFF Research Database (Denmark)

    Michailovsky, Claire Irene B.

    response of a catchment to meteorological forcing. While river discharge cannot be directly measured from space, radar altimetry (RA) can measure water level variations in rivers at the locations where the satellite ground track and river network intersect called virtual stations or VS. In this PhD study...... been between 10 and 35 days for altimetry missions until now. The location of the VS is also not necessarily the point at which measurements are needed. On the other hand, one of the main strengths of the dataset is its availability in near-real time. These characteristics make radar altimetry ideally...... suited for use in data assimilation frameworks which combine the information content from models and current observations to produce improved forecasts and reduce prediction uncertainty. The focus of the second and third papers of this thesis was therefore the use of radar altimetry as update data...

  19. Characteristics of the Great Whale River plume

    Science.gov (United States)

    Ingram, R. Grant

    1981-03-01

    Observations of the motion field and dilution effects associated with the plume of Great Whale River in Hudson Bay are presented for both open water and ice-covered conditions. In the summer months a distinct plume of about 100 km2 in area is formed offshore which is characterized by a 1-2 m thickness and large velocities directed away from the river mouth in contrast to slower currents parallel to the shore in the ambient waters underneath. Surface drifter results suggest that the outer boundary of plume may be a zone of frontal convergence. Under ice-covered conditions the plume was significantly thicker and extended much farther offshore in spite of a marked reduction in river runoff at this time.

  20. Land protection plan : Bear River Watershed Conservation Area

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The U.S. Fish and Wildlife Service is establishing a conservation area for the Bear River watershed in Idaho, Utah, and Wyoming. The Bear River Watershed...

  1. Habitat Management Plan for Roanoke River National Wildlife Refuge

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Roanoke River NWR Habitat Management Plan provides a long-term vision and specific guidance on managing habitats for the resources of concern at Roanoke River...

  2. Splitting rivers at their seams: bifurcations and avulsion

    NARCIS (Netherlands)

    Kleinhans, M.G.; Ferguson, R.I.; Lane, S.N.; Hardy, R.J.

    2012-01-01

    River bifurcations are critical but poorly understood elements of many geomorphological systems. They are integralelements of alluvial fans, braided rivers, fluvial lowland plains, and deltas and control the partitioning of water and sediment throughthese systems. Bifurcations are commonly unstable

  3. Channel centerline for the Rogue River, Oregon in 2009

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Rogue River drains 13,390 square kilometers of southwestern Oregon before flowing into the Pacific Ocean near the town of Gold Beach, Oregon. The Rogue River...

  4. Channel centerline for the Rogue River, Oregon in 2005

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Rogue River drains 13,390 square kilometers of southwestern Oregon before flowing into the Pacific Ocean near the town of Gold Beach, Oregon. The Rogue River...

  5. Special report of Horsefeldt-White River patrol

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report covers a patrol made by horseback and pack train from the headwaters of the copper River across the upper drainage to the Tanana River and terminating on...

  6. 2009 Oregon Parks and Recreation Department Lidar: Columbia River

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The data set represents the lidar elevations along the Columbia River corridor in Oregon, including portions of the following counties: Gilliam, Hood River,...

  7. Spatial distributions of biophysical conditions on the Ohio River

    Science.gov (United States)

    Conceptually, landscape and hydrogeomorphic features associated with large floodplain river ecosystems impose spatial organization on river biota, nutrients, and habitat. We examined whether resulting patchiness was evident in basin and riparian landcover, water chemistry, fish a...

  8. Habitat Management Plan for Tensas River National Wildlife Refuge

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Tensas River NWR Habitat Management Plan provides a long-term vision and specific guidance on managing habitats for the resources of concern at Tensas River NWR,...

  9. Refuge Trip Report for White River National Wildlife Refuge

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report covers the refuge trip to White River National Wildlife River to assess the potential of increasing the quantity and quality waterfowl wintering...

  10. AFSC/ABL: Movements of Yukon River Chinook salmon

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Upriver movements were determined for Chinook salmon Oncorhynchus tshawytscha returning to the Yukon River, a large, relatively pristine river basin. A total of...

  11. Freshwater mussels of Cahaba River National Wildlife Refuge

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This is a summary of 2004 freshwater mussel inventory on Cahaba River National Wildlife Refuge. The Cahaba River National Wildlife Refuge was established for the...

  12. Environmental contaminants in aquatic resources from the Columbia River

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Columbia River is an important resource for fish and wildlife, and a number of National Wildlife Refuges (NWRs) were established along the river to protect...

  13. UMRS LTRMP 2010/11 LCU Mapping -- Open River South

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Aerial photographs for Pools 1-13 Upper Mississippi River System and Pools, Alton-Marseilles, Illinois River were collected in color infrared (CIR) in August of...

  14. Morphodynamic river processes and techniques for assessment of channel evolution in Alpine gravel bed rivers

    Science.gov (United States)

    Formann, E.; Habersack, H. M.; Schober, St.

    2007-10-01

    Over the past 10 years many restoration projects have been undertaken in Austria, and river engineering measures such as spur dykes and longitudinal bank protection, which imposed fixed lateral boundaries on rivers, have been removed. The EU-Life Project "Auenverbund Obere Drau" has resulted in extensive restoration on the River Drau, aimed to improve the ecological integrity of the river ecosystem, to arrest riverbed degradation, and to ensure flood protection. An essential part of the restoration design involved the consideration of self-forming river processes, which led to new demands being imposed on river management. This paper illustrates how model complexity is adapted to the solution and evaluation of different aspects of river restoration problems in a specific case. Point-scale monitoring data were up-scaled to the whole investigation area by means of digital elevation models, and a scaling approach to the choice of model complexity was applied. Simple regime analysis methods and 1-D models are applicable to the evaluation of long-term and reach-scale restoration aims, and to the prediction of kilometre-scale processes (e.g. mean river bed aggradation or degradation, flood protection). 2-D models gave good results for the evaluation of hydraulic changes (e.g. transverse flow velocities, shear stresses, discharges at diffluences) for different morphological units at the local scale (100 m-10 m), and imposed an intermediate demand on calibration data and topographic survey. The study shows that complex 3-D numerical models combined with high resolution digital elevation models are necessary for detailed analysis of processes (1 m-0.01 m), but not for the evaluation of the restoration aims on the River Drau. In conclusion, model choice (complexity) will depend on both lower limits (determined by the complexity of processes to be analysed) and upper limits (field data quality and process understanding for numerical models).

  15. Landscape elements and river chemistry as affected by river regulation – a 3-D perspective

    Directory of Open Access Journals (Sweden)

    E. Smedberg

    2008-11-01

    Full Text Available We tested the hypothesis whether individual land classes within a river catchment contribute equally to river loading with dissolved constituents or whether some land classes act as "hot spots" to river loading and if so, are these land classes especially affected by hydrological alterations. The amount of land covered by forests and wetlands and the average soil depth of a river catchment explain 58–93% of the variability in total organic carbon (TOC and dissolved silicate (DSi concentrations for 22 river catchments in Northern Sweden. Whereas only 3% of the headwater areas of the Luleälven have been inundated by the creation of reservoirs, some 10% of the soils and aggregated forest and wetland areas have been lost due to damming and further hydrological alteration such as bypassing entire sub-catchments by headrace tunnels. However, looking at individual forest classes, our estimates indicate that some 37% of the deciduous forests have been inundated by the four major reservoirs built in the Luleälven headwaters. These deciduous forest and wetlands formerly growing on top of alluvial deposits along the river corridors forming the riparian zone play a vital role in loading river water with dissolved constituents, especially DSi. A digital elevation model draped with land classes and soil depths which highlights that topography of various land classes acting as hot spots is critical in determining water residence time in soils and biogeochemical fluxes. Thus, headwater areas of the Luleälven appear to be most sensitive to hydrological alterations due to the thin soil cover (on average 2.7–4.5 m and only patchy appearance of forest and wetlands that were significantly perturbed. Moreover, since these headwater areas are characterized often by high specific discharge, this relatively minor change in the landscape when compared to the entire river catchment may indeed explain the significant lower fluxes at the river mouth.

  16. Sediment regime constraints on river restoration - An example from the lower missouri river

    Science.gov (United States)

    Jacobson, R.B.; Blevins, D.W.; Bitner, C.J.

    2009-01-01

    Dammed rivers are subject to changes in their flow, water-quality, and sediment regimes. Each of these changes may contribute to diminished aquatic habitat quality and quantity. Of the three factors, an altered sediment regime is a particularly unyielding challenge on many dammed rivers. The magnitude of the challenge is illustrated on the Lower Missouri River, where the largest water storage system in North America has decreased the downriver suspended-sediment load to 0.2%-17% of predamloads. In response to the altered sediment regime, the Lower Missouri River channel has incised as much as 3.5 m just downstream of Gavins Point Dam, although the bed has been stable to slightly aggrading at other locations farther downstream. Effects of channel engineering and commercial dredging are superimposed on the broad-scale adjustments to the altered sediment regime. The altered sediment regime and geomorphic adjustments constrain restoration and management opportunities. Incision and aggradation limit some objectives of flow-regime management: In incising river segments, ecologically desirable reconnection of the floodplain requires discharges that are beyond operational limits, whereas in aggrading river segments, small spring pulses may inundate or saturate low-lying farmlands. Lack of sediment in the incising river segment downstream of Gavins Point Dam also limits sustainable restoration of sand-bar habitat for bird species listed under the Endangered Species Act. Creation of new shallow-water habitat for native fi shes involves taking sediment out of floodplain storage and reintroducing most or all of it to the river, raising concerns about increased sediment, nutrient, and contaminant loads. Calculations indicate that effects of individual restoration projects are small relative to background loads, but cumulative effects may depend on sequence and locations of projects. An understanding of current and historical sediment fl uxes, and how they vary along the river

  17. Managing the wetlands. People and rivers: Africa.

    Science.gov (United States)

    Dugan, P

    1993-01-01

    At the current population growth rate in Africa, the population will reach 1 billion by 2010. Water is needed to sustain these people, yet rainfall in Africa is erratic. Africans are already confronting a shortage of freshwater. Agriculture supports 66% of the population of sub-Saharan Africa. Sound agricultural development is needed to curb rural-urban migration, but a constant supply of freshwater is essential. Major rivers (the Limpopo in southern Africa and the Save/Sabi in Zimbabwe and Mozambique) now flow only seasonally. The flows of the Chari-Logona, the Nile, and the Zambezi are falling. Continual mismanagement of Africa's river basins coupled with current projections of global climate change will expand desiccation. All but the White Nile and the Zaire rivers flood seasonally every year, thereby expanding Africa's wetlands. Wetlands have been targeted for development projects (e.g., hydroelectric projects and large dams), largely to meet urban-industrial demands. Development planners tend to ignore the economic value of the wetlands. For example, the Niger Inland Delta sustains 550,000 people, 1 million cattle, and 1 million sheep. Wetlands replenish ground water and serve as natural irrigation. River basin planning often results in environmentally disastrous schemes which do not understand local management practices. Hydrologists, engineers, geologists, and economics design these schemes, but sociologists, anthropologists, and development experts should be included. The unfinished Jonglei Canal in southern Sudan would have adversely affected 400,000 pastoralists. The Volta River Authority's Akosombo Dam displaced 84,000 people and flooded the most productive agricultural land in Ghana. A sustainable future in Africa depends on understanding the interactions of human uses and the ways in which they relate to the natural variations in river flow. The IUCN Wetlands Programme, based on the principles of the World Conservation Strategy, is working with

  18. REE Geochemistry of Euphrates River, Turkey

    Directory of Open Access Journals (Sweden)

    Leyla Kalender

    2016-01-01

    Full Text Available The study area is located on the Euphrates River at 38°41°32.48′′N–38°14′24.10′′N latitude and 39°56′4.59′′E–39°8°13.41′′E longitude. The Euphrates is the longest river in Western Asia. The lithological units observed from the bottom to the top are Permo-Triassic Keban Metamorphites, Late Cretaceous Kömürhan Ophiolites, Upper Cretaceous Elazığ Magmatic Complex, Middle Eocene Maden Complex and Kırkgeçit Formation, Upper Pliocene and Lower Eocene Seske Formation and Upper Miocene, Pliocene Karabakır and Çaybağı Formations, Palu Formation, and Holocene Euphrates River sediments. The geochemical studies show that 87Sr/86Sr and 143Nd/144Nd isotopic compositions in the Euphrates River bank sediments are 0.7053, 0.7048, and 0.7057 and 0.512654, 0.512836, and 0.512775, respectively. These values indicate mixing of both carbonate-rich shallow marine sediment and felsic-mafic rocks from Elazığ Magmatic Complex into the stream sediments. The positive εNd (0 values (0.35, 3.9, and 2.7 are higher downstream in the studied sediments due to weathering of the mafic volcanic rocks. The chondrite, NAS, and UCC normalized patterns show that the REE compositions of the Euphrates River sediments are higher than chondrite composition but close to NAS and UCC. The river sediments in the tectonic zone and the weathered granodioritic rocks of the Elazığ Magmatic complex affect upstream water compositions.

  19. Automatic River Network Extraction from LIDAR Data

    Science.gov (United States)

    Maderal, E. N.; Valcarcel, N.; Delgado, J.; Sevilla, C.; Ojeda, J. C.

    2016-06-01

    National Geographic Institute of Spain (IGN-ES) has launched a new production system for automatic river network extraction for the Geospatial Reference Information (GRI) within hydrography theme. The goal is to get an accurate and updated river network, automatically extracted as possible. For this, IGN-ES has full LiDAR coverage for the whole Spanish territory with a density of 0.5 points per square meter. To implement this work, it has been validated the technical feasibility, developed a methodology to automate each production phase: hydrological terrain models generation with 2 meter grid size and river network extraction combining hydrographic criteria (topographic network) and hydrological criteria (flow accumulation river network), and finally the production was launched. The key points of this work has been managing a big data environment, more than 160,000 Lidar data files, the infrastructure to store (up to 40 Tb between results and intermediate files), and process; using local virtualization and the Amazon Web Service (AWS), which allowed to obtain this automatic production within 6 months, it also has been important the software stability (TerraScan-TerraSolid, GlobalMapper-Blue Marble , FME-Safe, ArcGIS-Esri) and finally, the human resources managing. The results of this production has been an accurate automatic river network extraction for the whole country with a significant improvement for the altimetric component of the 3D linear vector. This article presents the technical feasibility, the production methodology, the automatic river network extraction production and its advantages over traditional vector extraction systems.

  20. Observing river stages using unmanned aerial vehicles

    Science.gov (United States)

    Niedzielski, Tomasz; Witek, Matylda; Spallek, Waldemar

    2016-08-01

    We elaborated a new method for observing water surface areas and river stages using unmanned aerial vehicles (UAVs). It is based on processing multitemporal five orthophotomaps produced from the UAV-taken visible light images of nine sites of the river, acquired with a sufficient overlap in each part. Water surface areas are calculated in the first place, and subsequently expressed as fractions of total areas of water-covered terrain at a given site of the river recorded on five dates. The logarithms of the fractions are later calculated, producing five samples, each consisted of nine elements. In order to detect statistically significant increments of water surface areas between two orthophotomaps, we apply the asymptotic and bootstrapped versions of the Student's t test, preceded by other tests that aim to check model assumptions. The procedure is applied to five orthophotomaps covering nine sites of the Ścinawka river (south-western (SW) Poland). The data have been acquired during the experimental campaign, at which flight settings were kept unchanged over nearly 3 years (2012-2014). We have found that it is possible to detect transitions between water surface areas associated with all characteristic water levels (low, mean, intermediate and high stages). In addition, we infer that the identified transitions hold for characteristic river stages as well. In the experiment we detected all increments of water level: (1) from low stages to mean, intermediate and high stages; (2) from mean stages to intermediate and high stages; and (3) from intermediate stages to high stages. Potential applications of the elaborated method include verification of hydrodynamic models and the associated predictions of high flows as well as monitoring water levels of rivers in ungauged basins.

  1. Life history diversity in Klamath River steelhead

    Science.gov (United States)

    Hodge, Brian W.; Wilzbach, Peggy; Duffy, Walter G. G.; Quinones, Rebecca M.; Hobbs, James A.

    2016-01-01

    Oncorhynchus mykiss exhibits a vast array of life histories, which increases its likelihood of persistence by spreading risk of extirpation among different pathways. The Klamath River basin (California–Oregon) provides a particularly interesting backdrop for the study of life history diversity in O. mykiss, in part because the river is slated for a historic and potentially influential dam removal and habitat recolonization project. We used scale and otolith strontium isotope (87Sr/86Sr) analyses to characterize life history diversity in wildO. mykiss from the lower Klamath River basin. We also determined maternal origin (anadromous or nonanadromous) and migratory history (anadromous or nonanadromous) of O. mykiss and compared length and fecundity at age between anadromous (steelhead) and nonanadromous (Rainbow Trout) phenotypes of O. mykiss. We identified a total of 38 life history categories at maturity, which differed in duration of freshwater and ocean rearing, age at maturation, and incidence of repeat spawning. Approximately 10% of adult fish sampled were nonanadromous. Rainbow Trout generally grew faster in freshwater than juvenile steelhead; however, ocean growth afforded adult steelhead greater length and fecundity than adult Rainbow Trout. Although 75% of individuals followed the migratory path of their mother, steelhead produced nonanadromous progeny and Rainbow Trout produced anadromous progeny. Overall, we observed a highly diverse array of life histories among Klamath River O. mykiss. While this diversity should increase population resilience, recent declines in the abundance of Klamath River steelhead suggest that life history diversity alone is not sufficient to stabilize a population. Our finding that steelhead and Rainbow Trout give rise to progeny of the alternate form (1) suggests that dam removal might lead to a facultatively anadromous O. mykiss population in the upper basin and (2) raises the question of whether both forms of

  2. Bathymetry of the Hong and Luoc River Junction, Red River Delta, Vietnam, 2010

    Science.gov (United States)

    Kinzel, Paul J.; Nelson, Jonathan M.; Toan, Duong Duc; Thanh, Mung Dinh; Shimizu, Yasuyuki

    2012-01-01

    The U.S. Geological Survey, in collaboration with the Water Resources University in Hanoi, Vietnam, conducted a bathymetric survey of the junction of the Hong and Luoc Rivers. The survey was done to characterize the channel morphology of this delta distributary network and provide input for hydrodynamic and sediment transport models. The survey was carried out in December 2010 using a boat-mounted multibeam echo sounder integrated with a global positioning system. A bathymetric map of the Hong and Luoc River junction was produced which was referenced to the datum of the Trieu Duong tide gage on the Luoc River.

  3. River discharge contribution to sea-level rise in the Yangtze River Estuary, China

    Science.gov (United States)

    Kuang, Cuiping; Chen, Wei; Gu, Jie; Su, Tsung-Chow; Song, Hongling; Ma, Yue; Dong, Zhichao

    2017-02-01

    Sea level changes in the Yangtze River Estuary (YRE) as a result of river discharge are investigated based on the monthly averaged river discharge from 1950 to 2011 at the Datong station. Quantification of the sea level contribution is made by model computed results and the sea level rates reported by the China Sea Level Bulletin (CSLB). The coastal modeling tool, MIKE21, is used to establish a depth-averaged hydrodynamic model covering the YRE and Hangzhou Bay. The model is validated with the measured data. Multi-year monthly river discharges are statistically calculated based on the monthly river discharges at Datong station from 1950 to 2011. The four characteristic discharges (frequency of 75%, 50% and 25%, and multi-year monthly) and month-averaged river discharge from 1950 to 2011 are used to study the seasonal and long-term changes of sea level. The computed sea level at the Dajishan and Lvsi stations are used to study the multi-time scale structure of periodic variation in different time scale of river discharge series. The results reveal that (1) the sea level rises as the river discharge increases, and its amplification decreases from upstream to the offshore. (2) The sea level amplification on the south coast is greater than that on the north coast. When river discharge increases by 20,000 m3/s, the sea level will increase by 0.005-0.010 m in most of Hangzhou Bay. (3) The sea level at the Dajishan station, influenced by river discharge, increased 0.178 mm/y from 1980 to 2011. Correspondingly, the sea level rose at a rate of 2.6-3.0 mm/y during the same period. These values were provided by the CSLB. The increase in sea level (1980-2011) at the Dajishan station caused by river discharge is 6.8-8.9% of the total increase in sea level. (4) The 19-20 year dominant nodal cycle of sea level at the Dajishan and Lvsi stations is in accord with 18.6 year nodal cycle of main tidal constituents on Chinese coasts. It implies that the sea-level change period on the

  4. Research on the conversion relationships between the river and groundwater in the Yellow River drainage area

    Institute of Scientific and Technical Information of China (English)

    WANG; Wenke; KONG; Jinling; DUAN; Lei; WANG; Yanlin; MA; Xi

    2004-01-01

    Conversion relationships between the river and groundwater in the Yellow River drainage area are studied in this paper based on the geologic and physiognomy conditions and the data of the groundwater regime, isotope, groundwater flow field and field survey. Then eight recharge and discharge modes on the relationships are put forward and the hydraulic characteristics of the modes are analysed, which provides a scientific basis for quantitatively simulating and assessing the conversion relationships,maintenance mechanism of the Yellow River and the regeneration ability of the groundwater in the area.

  5. Partners in Leadership for Pearl River

    Science.gov (United States)

    2007-01-01

    Members of the 2007 class of Partners in Leadership toured NASA Stennis Space Center in Hancock County, Miss., on Jan. 11. They visited the center's B Test Stand, part of the center's rocket engine test complex. The Partners in Leadership training program is designed to teach Pearl River County leaders about their county's government, economic development, health and human services, history and arts, environment and education during a 10-month period. The program, sponsored by the Partners for Pearl River County, helps fulfill the mission of the economic and community development agency.

  6. Sediment Transport in Rivers with Overbank Flow

    Institute of Scientific and Technical Information of China (English)

    Donald; W; KNIGHT

    2005-01-01

    Some concepts related to sediment transport in rivers with overbank flow are described.Following a description of the physical processes that are involved when a river inundates its floodplains,some simple com- putational methods are presented which permit the depth-averaged velocity and boundary shear stress to be pre- dicted within a cross section of variable,but prismatic shape.The methoda account for the strong transverse shear in velocity that occurs when the stage is just above bankfull,as well as ...

  7. The Chena River Watershed Hydrology Model

    Science.gov (United States)

    2012-04-01

    ER D C/ CR R EL T R -1 2 -1 The Chena River Watershed Hydrology Model C ol d R eg io n s R es ea rc h an d E n gi n ee ri n g La...14 Table 6. Estimated monthly ET using Hargreaves method and pan...using water balance method A generalized water balance for the Chena River watershed can be written as mS P S ET R     (3) where P

  8. Radioiodine in the Savannah River Site environment

    Energy Technology Data Exchange (ETDEWEB)

    Kantelo, M.V.; Bauer, L.R.; Marter, W.L.; Murphy, C.E. Jr.; Zeigler, C.C.

    1993-01-15

    Radioiodine, which is the collective term for all radioactive isotopes of the element iodine, is formed at the Savannah River Site (SRS) principally as a by-product of nuclear reactor operations. Part of the radioiodine is released to the environment during reactor and reprocessing operations at the site. The purpose of this report is to provide an introduction to radioiodine production and disposition, its status in the environment, and the radiation dose and health risks as a consequence of its release to the environment around the Savannah River Plant. A rigorous dose reconstruction study is to be completed by thee Center for Disease Control during the 1990s.

  9. Jiangxinzhou-Emerald on the Yangtze River

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    <正>Jiangxinzhou, green as jade and shaped like a green plum, is inlaid on the Yangtze River, in the western part of Jianye District in Nanjing, Jiangsu Province. It is only 6 kilometers away from Xinjiekou, the downtown commercial center, and is separated from the new modern city, the New District of Hexi in Nanjing, with a strip of water. The river with a distant source and long stream is just like the arms of a mother to embrace the green island of 15 kilometers and to nourish the 12,000 residents at the island.

  10. Contaminant variability in a sedimentation area of the river Rhine.

    NARCIS (Netherlands)

    Winkels, H.J.

    1997-01-01

    Aquatic sediments in sedimentation zones of major rivers are in general sinks for pollutants. The sedimentation zone Ketelmeer/IJsselmeer is an important sink for contaminants of the river Rhine (i.e. river IJssel). Recent and historical pollution interact here. Redistribution of suspended solids an

  11. 78 FR 44433 - Safety Zone; Metedeconk River; Brick Township, NJ

    Science.gov (United States)

    2013-07-24

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Metedeconk River; Brick Township, NJ AGENCY... regulation applies to only one recurring fireworks event held in the Metedeconk River in Brick Township, NJ... CFR 165.506, an entry 19 for the Metedeconk River, Brick Township, NJ Safety Zone will be added from...

  12. 76 FR 37039 - Drawbridge Operation Regulation; Passaic River, Harrison, NJ

    Science.gov (United States)

    2011-06-24

    ... SECURITY Coast Guard 33 CFR Part 117 RIN 1625-AA09 Drawbridge Operation Regulation; Passaic River, Harrison... across the Passaic River, mile 5.0, at Harrison, New Jersey. The owner of the bridge has requested relief... Amtrak Dock Bridge, mile 5.0, across the Passaic River, at Harrison, New Jersey, has a vertical...

  13. 75 FR 8390 - St. Croix River Aids to Navigation

    Science.gov (United States)

    2010-02-24

    ... SECURITY Coast Guard St. Croix River Aids to Navigation AGENCY: Coast Guard, DHS. ACTION: Notice of public... the aids to navigation in the St. Croix River. DATES: A public meeting will be held on Tuesday, March... review the current Aids to Navigation system on the St. Croix River and discuss concerns and...

  14. 76 FR 52563 - Special Local Regulations; Sabine River, Orange, TX

    Science.gov (United States)

    2011-08-23

    ... SECURITY Coast Guard 33 CFR Part 100 RIN 1625-AA08 Special Local Regulations; Sabine River, Orange, TX... temporary Special Local Regulation on the Sabine River within the Port Arthur, TX Captain of the Port Zone. This Special Local Regulation is intended to restrict vessels from portions of the Sabine River...

  15. Large River Sediment Transport and Deposition: An Annotated Bibliography.

    Science.gov (United States)

    1998-04-01

    geometry, model, river 110. HICKIN, E. J. 1995. River geomorphology. International Association of Geomorphologists , Publication 2. John Wiley... Association of Geomorphologists . They reflect the rich diversity of present-day geomorphological studies being conducted throughout the world. Topics...Sons, New York. n.p. Several river studies were presented in August 1993 at the Third International Geomorphology Conference of the International

  16. Downstream hydraulic geometry of a tidally influenced river delta

    NARCIS (Netherlands)

    Sassi, M.G.; Hoitink, A.J.F.; Brye, de B.; Deleersnijder, E.

    2012-01-01

    Channel geometry in tidally influenced river deltas can show a mixed scaling behavior between that of river and tidal channel networks, as the channel forming discharge is both of river and tidal origin. We present a method of analysis to quantify the tidal signature on delta morphology, by extendin

  17. 76 FR 61382 - Colorado River Basin Salinity Control Advisory Council

    Science.gov (United States)

    2011-10-04

    ... Bureau of Reclamation Colorado River Basin Salinity Control Advisory Council AGENCY: Bureau of Reclamation, Interior. ACTION: Notice of public meeting. ] SUMMARY: The Colorado River Basin Salinity Control Advisory Council (Council) was established by the Colorado River Basin Salinity Control Act of 1974 (Pub....

  18. 75 FR 25877 - Colorado River Basin Salinity Control Advisory Council

    Science.gov (United States)

    2010-05-10

    ... Bureau of Reclamation Colorado River Basin Salinity Control Advisory Council AGENCY: Bureau of Reclamation, Interior. ACTION: Notice of public meeting. SUMMARY: The Colorado River Basin Salinity Control Advisory Council (Council) was established by the Colorado River Basin Salinity Control ] Act of 1974...

  19. 78 FR 70574 - Colorado River Basin Salinity Control Advisory Council

    Science.gov (United States)

    2013-11-26

    ....20350010.REG0000, RR04084000] Colorado River Basin Salinity Control Advisory Council AGENCY: Bureau of Reclamation, Interior. ACTION: Notice of public meeting. SUMMARY: The Colorado River Basin Salinity Control Advisory Council (Council) was established by the Colorado River Basin Salinity Control Act of 1974 (Pub....

  20. 77 FR 23508 - Colorado River Basin Salinity Control Advisory Council

    Science.gov (United States)

    2012-04-19

    ... Bureau of Reclamation Colorado River Basin Salinity Control Advisory Council AGENCY: Bureau of Reclamation, Interior. ACTION: Notice of public meeting. SUMMARY: The Colorado River Basin Salinity Control Advisory Council (Council) was established by the Colorado River Basin Salinity Control Act of 1974 (Pub....

  1. 75 FR 27360 - Colorado River Basin Salinity Control Advisory Council

    Science.gov (United States)

    2010-05-14

    ... Bureau of Reclamation Colorado River Basin Salinity Control Advisory Council AGENCY: Bureau of Reclamation, Interior. ACTION: Notice of public meeting. SUMMARY: The Colorado River Basin Salinity Control Advisory Council (Council) was established by the Colorado River Basin Salinity Control Act of 1974 (Pub....

  2. 75 FR 66389 - Colorado River Basin Salinity Control Advisory Council

    Science.gov (United States)

    2010-10-28

    ... Bureau of Reclamation Colorado River Basin Salinity Control Advisory Council AGENCY: Bureau of Reclamation, Interior. ACTION: Notice of public meeting. SUMMARY: The Colorado River Basin Salinity Control Advisory Council (Council) was established by the Colorado River Basin Salinity Control Act of 1974 (Pub....

  3. 76 FR 24515 - Colorado River Basin Salinity Control Advisory Council

    Science.gov (United States)

    2011-05-02

    ... Bureau of Reclamation Colorado River Basin Salinity Control Advisory Council AGENCY: Bureau of... Committee Act, the Bureau of Reclamation announces that the Colorado River Basin Salinity Control Advisory...) 524-3826; e-mail at: kjacobson@usbr.gov . SUPPLEMENTARY INFORMATION: The Colorado River Basin...

  4. 77 FR 61784 - Colorado River Basin Salinity Control Advisory Council

    Science.gov (United States)

    2012-10-11

    ... Bureau of Reclamation Colorado River Basin Salinity Control Advisory Council AGENCY: Bureau of Reclamation, Interior. ACTION: Notice of public meeting. SUMMARY: The Colorado River Basin Salinity Control Advisory Council (Council) was established by the Colorado River Basin Salinity Control Act of 1974 (Pub....

  5. 78 FR 23784 - Colorado River Basin Salinity Control Advisory Council

    Science.gov (United States)

    2013-04-22

    ... Bureau of Reclamation Colorado River Basin Salinity Control Advisory Council AGENCY: Bureau of Reclamation, Interior. ACTION: Notice of public meeting. SUMMARY: The Colorado River Basin Salinity Control Advisory Council (Council) was established by the Colorado River Basin Salinity Control Act of 1974...

  6. A Visit to Gyigu by the Tongtian River

    Institute of Scientific and Technical Information of China (English)

    BYBAYINGDONGZHUBCERANG

    2004-01-01

    Tongtian River refers to the reach where the Tuto River, the origin of Yangtze River, joins the Tangqu, running southeast and passing the Batang outfall in Yushu, the Tibetan-inhabited area in Qinghai. It stretches 813 km, with a drainage area of 138,000 square km.

  7. 76 FR 58105 - Regulated Navigation Area; Saugus River, Lynn, MA

    Science.gov (United States)

    2011-09-20

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA11 Regulated Navigation Area; Saugus River, Lynn, MA AGENCY... River in Lynn, MA. Establishing this temporary rule will allow the necessary stabilization work to be... on the Energy Systems Pipeline Bridge on the Saugus River in Lynn, MA. The regulated area...

  8. 78 FR 3836 - Drawbridge Operation Regulation; Shark River, Avon, NJ

    Science.gov (United States)

    2013-01-17

    ... SECURITY Coast Guard 33 CFR Part 117 Drawbridge Operation Regulation; Shark River, Avon, NJ AGENCY: Coast... which are across the Shark River (South Channel), at Avon Township, NJ. This deviation is necessary to facilitate machinery replacement on the Shark River railroad bridge. This temporary deviation will allow...

  9. 77 FR 57022 - Drawbridge Operation Regulation; Shark River, Avon, NJ

    Science.gov (United States)

    2012-09-17

    ... SECURITY Coast Guard 33 CFR Part 117 Drawbridge Operation Regulation; Shark River, Avon, NJ AGENCY: Coast..., and the S35 bridge, mile 0.9, all of which are across the Shark River (South Channel), at Avon Township, NJ. This deviation is necessary to facilitate stringer replacement on the Shark River...

  10. Variable input parameter influence on river corridor prediction

    NARCIS (Netherlands)

    Zerfu, T.; Beevers, L.; Crosato, A.; Wright, N.

    2015-01-01

    This paper considers the erodible river corridor, which is the area in which the main river channel is free to migrate over a period of time. Due to growing anthropogenic pressure, predicting the corridor width has become increasingly important for the planning of development along rivers. Several a

  11. River discharge changes in the Qinghai-Tibet Plateau

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Annual mean discharge data of the five large rivers in the exorheic region of the Qinghai-Tibet Plateau from 1956 to 2000 are analyzed for trends with the Mann-Kendall nonparametric trend test. The results reveal that though in general no increasing trends exist in the total river discharges, significant regional differences of river discharge exist, reflecting the decreasing trends of discharge in the Yellow River and the Tongtian River (upper Changjiang River), an increasing trend in Yalong River, and inverted change in the Lancang River and Yarlung Zangbo River. Based on analyses of the seasonal discharge, it is found that climatic change had a significant effect on the seasonal variation of river discharge in the Qinghai-Tibet Plateau. In spring (from March to May) the discharge increased significantly, especially in the source area of the Yellow River. Together with the analyses on data of the mean temperature in the Northern Hemisphere and climatic data within the river basins, the relationship between discharges and mean temperature of the Northern Hemisphere is explored, which indicates that there is no increase in the stream discharge in the Qinghai-Tibet Plateau with global warming. It is probably the increasing evaporation, caused by rising temperature that offsets the hydrological effect of increasing precipitation.

  12. Quantitatively distinguishing sediments from the Yangtze River and the Yellow River using δEu_N-ΣREEs plot

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    Sediment samples were collected from the lower channel of the Yangtze River and the Yellow River and the contents of rare earth elements (REEs) were measured. In addition, some historical REEs data were collected from published literatures. Based on the δEuN-ΣREEs plot, a clear boundary was found be-tween the sediments from the two rivers. The boundary can be described as an orthogonal polynomial equation by ordinary linear regression with sediments from the Yangtze River located above the curve and sediments from the Yellow River located below the curve. To validate this method, the REEs con-tents of sediments collected from the estuaries of the Yangtze River and the Yellow River were meas-ured. In addition, the REEs data of sediment Core 255 from the Yangtze River and Core YA01 from the Yellow River were collected. Results show that the samples from the Yangtze River estuary and Core 255 almost are above the curve and most samples from the Yellow River estuary and Core YA01 are below the curve in the δEuN-ΣREEs plot. The plot and the regression equation can be used to distin-guish sediments from the Yangtze River and the Yellow River intuitively and quantitatively, and to trace the sediment provenance of the eastern seas of China. The difference between the sediments from two rivers in the δEuN-ΣREEs plot is caused by different mineral compositions and regional climate patterns of the source areas. The relationship between δEuN and ΣREEs is changed little during the transport from the source area to the river, and from river to the sea. Thus the original information on mineral compositions and climate of the source area was preserved.

  13. Quantitatively distinguishing sediments from the Yangtze River and the Yellow River using δEuN-ΣREEs plot

    Institute of Scientific and Technical Information of China (English)

    JIANG FuQing; ZHOU XiaoJing; LI AnChun; LI TieGang

    2009-01-01

    Sediment samples were collected from the lower channel of the Yangtze River and the Yellow River and the contents of rare earth elements (REEs) were measured. In addition, some historical REEs data were collected from published literatures. Based on the δEuN-ΣREEs plot, a clear boundary was found be-tween the sediments from the two rivers. The boundary can be described as an orthogonal polynomial equation by ordinary linear regression with sediments from the Yangtze River located above the curve and sediments from the Yellow River located below the curve. To validate this method, the REEs con-tents of sediments collected from the estuaries of the Yangtze River and the Yellow River were meas-ured. In addition, the REEs data of sediment Core 255 from the Yangtze River and Core YA01 from the Yellow River were collected. Results show that the samples from the Yangtze River estuary and Core 255 almost are above the curve and most samples from the Yellow River estuary and Core YA01 are below the curve in the δEuN-ΣREEs plot. The plot and the regression equation can be used to distin-guish sediments from the Yangtze River and the Yellow River intuitively and quantitatively, and to trace the sediment provenance of the eastern seas of China. The difference between the sediments from two rivers in the δEuN-ΣREEs plot is caused by different mineral compositions and regional climate patterns of the source areas. The relationship between δEuN and ΣREEs is changed little during the transport from the source area to the river, and from river to the sea. Thus the original information on mineral compositions and climate of the source area was preserved.

  14. Morphometric Characters of a Himalayan River Basin-Pindari river of Pindari Glacier

    Science.gov (United States)

    Patel, L. K.; Pillai, J.

    2011-12-01

    Himalayan region consist many glaciers and glacier-fed rivers. About 17% of the Indian Himalayan Region (IHR) is under permanent cover of Ice and snow and have more than 9000 glaciers and high altitude fresh water lakes. Stream runoff originating from the glaciers has direct implication in geomorphology of the region. Present study is an attempt to find out the stages in the geomorphic development of a higher altitudinal river basin, Pindari river basin. Development of a landscape is equal to the some total of the development of each individual drainage basin of which it is composed. Morphometric parameters of the river basin had been identified viz. linear, areal and relief aspect and examined. Pindari river basin is a 5th order high altitudinal, sub-dendratic, parallel and perennial tributary of Alaknanda River, formed by three main tributaries (Sunderdhunga, Pindari and Kafini). It has the catchment area above 557.63 Km2. This river originates from combined action of rain and snow fall from Pindari glacier which is part of Nanda Devi Biosphere Reserve (a world heritage site). Pindari river basin is located between 1600 m to 6880 m elevation ,and 300 03' 23" -300 19' 04" N Latitude and 790 45' 59" - 80 0 04' 13"E Longitude. Due to microclimatic conditions Pindari river basin generally dry with low annual precipitation. There is heavy rainfall during monsoon season. The approximate variation in the precipitation is from 750 mm to 2000 mm. For estimating the Morphometric parameter SOI toposheet on 1:50000 scale and Landsat data (ETM+) having 15m resolution were georectified in RS and GIS environment. SRTM data was used in analysis of elevation and slope range of the study area. Extensive field study was held on during the year 2010. Morphometric parameters (linear, aerial and relief) of the study area had been estimated. It is observed that Pindari river basin is a sub-dendratic, higher relief, youth, fine texture; elongated basin has peak flow, high discharge, and

  15. Environmental Contaminants in River Otter (Lontra canadensis) Collected from the Willamette River, Oregon, 1996-99

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Willamette River originates in the Cascade Mountains southeast of Eugene, Oregon and makes a 300 mile northward journey through the Willamette Valley, joining...

  16. 2000 Aerial Photo Mosaics - Upper Mississippi River System -- Open River 2

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The U.S. Geological Survey's Upper Midwest Environmental Sciences Center (UMESC) collects aerial photography of the Upper Mississippi River System (UMRS) floodplain...

  17. Snake River Islands Wilderness proposal : Snake River sector : Deer Flat National Wildlife Refuge

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This document describes the Snake River Islands in the Deer Flat National Wildlife Refuge which have been studied pursuant to the Wilderness Act of 1964 to determine...

  18. Digital spatial data as support for river basin management: The case of Sotla river basin

    Directory of Open Access Journals (Sweden)

    Prah Klemen

    2013-01-01

    Full Text Available Many real-world spatially related problems, including river-basin planning and management, give rise to geographical information system based decision making, since the performance of spatial policy alternatives were traditionally and are still often represented by thematic maps. Advanced technologies and approaches, such as geographical information systems (GIS, offer a unique opportunity to tackle spatial problems traditionally associated with more efficient and effective data collection, analysis, and alternative evaluation. This paper discusses the advantages and challenges of the use of digital spatial data and geographical information systems in river basis management. Spatial data on social, environmental and other spatial conditions for the study area of 451.77 km2, the Slovenian part of the Sotla river basin, are used to study the GIS capabilities of supporting spatial decisions in the framework of river basin management.

  19. Colorado River Wildlife Management Area (Green River Easements) [Land Status Map: Sheet 1 of 2

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This map was produced by the Division of Realty to depict landownership at Colorado River Wildlife Management Area. It was generated from rectified aerial...

  20. Floodplain methylmercury biomagnification factor higher than that of the contiguous river (South River, Virginia USA).

    Science.gov (United States)

    Newman, Michael C; Xu, Xiaoyu; Condon, Anne; Liang, Lian

    2011-10-01

    Mercury biomagnification on the South River floodplain (Virginia, USA) was modeled at two locations along a river reach previously modeled for methylmercury movement through the aquatic trophic web. This provided an opportunity to compare biomagnification in adjoining trophic webs. Like the aquatic modeling results, methylmercury-based models provided better prediction than those for total mercury. Total mercury Food Web Magnification Factors (FWMF, fold per trophic level) for the two locations were 4.9 and 9.5. Methylmercury FWMF for the floodplain locations were higher (9.3 and 25.1) than that of the adjacent river (4.6). Previous speculation was not resolved regarding whether the high mercury concentrations observed in floodplain birds was materially influenced by river prey consumption by riparian spiders and subsequent spider movement into the trophic web of the adjacent floodplains. Results were consistent with a gradual methylmercury concentration increase from contaminated floodplain soil, to arthropod prey, and finally, to avian predators.

  1. 1989 Land Cover/Use Data for the 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...

  2. 1989 Land Cover/Use Data for the Upper Mississippi River System--Open River 2

    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...

  3. 1989 Land Cover/Use Data for the Upper Mississippi River System--St Croix River

    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. 2011 UMRS Color Infrared Aerial Photo Mosaic - Mississippi River, Open River North South

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Upper Mississippi River Restoration-Environmental Management Program (UMRR-EMP) partnered with the U.S. Fish and Wildlife Service (USFWS) Region 3 to collect...

  5. 2011 UMRS Color Infrared Aerial Photo Mosaic - Mississippi River, Open River North North

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Upper Mississippi River Restoration-Environmental Management Program (UMRR-EMP) partnered with the U.S. Fish and Wildlife Service (USFWS) Region 3 to collect...

  6. 2011 UMRS Color Infrared Aerial Photo Mosaic - Mississippi River, Open River North Middle

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Upper Mississippi River Restoration-Environmental Management Program (UMRR-EMP) partnered with the U.S. Fish and Wildlife Service (USFWS) Region 3 to collect...

  7. 2011 UMRS Color Infrared Aerial Photo Mosaic - Mississippi River, Open River South South

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The Upper Mississippi River Restoration-Environmental Management Program (UMRR-EMP) partnered with the U.S. Fish and Wildlife Service (USFWS) Region 3 to collect...

  8. Proposal: Tennessee River and Lower Duck River Mussel Survey and Inventory

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Provide the Tennessee National Wildlife Refuge (NWR) with baseline data on freshwater mussel communities found within the lower 24 miles of the Duck River and the...

  9. Evaluation of benthic macroinvertebrate assemblage for disturbance zonation in urban rivers using multivariate analysis: Implications for river management

    Indian Academy of Sciences (India)

    Ram Devi Tachamo Shah; Deep Narayan Shah

    2013-08-01

    River pollution has tremendously increased in the major cities of South Asia, where the rivers have become a repository for domestic, agricultural, municipal and industrial wastes. This study presents the evaluation of benthic macroinvertebrate assemblage as a means of assessing ecological status, determining different disturbance zones and identifying environmental variables and stressors that deteriorate the river ecosystem. In total, 20 sites in 36-km stretch of the main stem of the Bagmati River and 7 sites on its tributaries were selected for sampling in the post-monsoon and pre-monsoon seasons during the time period 2008–2010. The Ganga River System Biotic Score (GRSbios) index was applied to determine the ecological status. The ecological status of the different Bagmati River stretches ranged from reference, class 1 to class 5 (extremely polluted). We identified three types of disturbance zones along the river, ranging from minimally polluted to extremely polluted. A river corridor survey was conducted to identify any river stressing factors, revealing a sharp deterioration of the river from upstream to downstream with increasing concentrations of chloride and ortho-phosphate phosphorus. Effluents and Activities and Facilities were found to be the major stressing factors to the river ecosystem. The information gained should help water managers find the most time-efficient and cost-effective measures to address river degradation.

  10. 78 FR 1936 - Tongue River Railroad Company, Inc.-Rail Construction and Operation-In Custer, Powder River and...

    Science.gov (United States)

    2013-01-09

    ... Surface Transportation Board Tongue River Railroad Company, Inc.--Rail Construction and Operation--In... Supplemental Application for Construction and Operation Authority and Board Acceptance. SUMMARY: Tongue River... Tongue River I.\\1\\ In 1996, the Board authorized TRRC to build a contiguous 41-mile line from Ashland...

  11. 77 FR 64592 - Tongue River Railroad Company, Inc.-Rail Construction and Operation-in Custer, Powder River and...

    Science.gov (United States)

    2012-10-22

    ... TRANSPORTATION Surface Transportation Board Tongue River Railroad Company, Inc.--Rail Construction and Operation... on Draft Scope. SUMMARY: On October 16, 2012, Tongue River Railroad Company, Inc. (TRRC) filed a... Miles City, Montana, and two termini located near Ashland, Montana, a proceeding known as Tongue River...

  12. My River My Home: Both Art and Science

    Science.gov (United States)

    Gillies, S. L.; Janmaat, A.; Marsh, S. J.; Peucker-Ehrenbrink, B.; Voss, B.; Holmes, R. M.; King, S.; Bertrand, K.

    2014-12-01

    The University of the Fraser Valley has been researching the water chemistry of the Fraser River since 2009 as a member of the Global Rivers Observatory coordinated by Woods Hole Oceanographic Institution and Woods Hole Research Center. The Global Rivers Observatory is advancing our understanding of how climate change, deforestation, and other disturbances are impacting river chemistry and land-ocean linkages. This knowledge is vital for tracking the health of Earth's watersheds and predicting how Earth's water and chemical cycles will change in the future. The Global Rivers Observatory also promotes the communication of science to the general public. In September 2013, the My River My Home art and science exhibit opened at the Fraser River Discovery Centre, New Westminster, BC. The exhibit is a global exchange of artwork created by children living along the rivers being studied by the Global Rivers Observatory scientists. The exhibit is intended to inspire young students to develop an awareness of the environment and the importance of rivers. Scientists from UFV, WHOI, and WHRC worked together with the Fraser River Discovery Centre on the science communication aspects of the display and to develop hands-on science activities looking at different aspects of river water quality. The exhibition has led to the creation of My River My Home, An Activity Kit for Educators about the sustainability of the Fraser River. The kit is being offered through the Fraser River Discovery Centre and deals with issues such as the importance of water, water quality, and encouraging a global perspective. The resource kit was classroom tested by several teachers, and four UBC teacher candidates worked on incorporating teacher suggestions into the kit. The resource kit will be available on-line at the end of September 2014 and contains inquiry based activities suitable for a variety of educational levels.

  13. Research on runoff forecast approaches to the Aksu River basin

    Institute of Scientific and Technical Information of China (English)

    OUYANG RuLin; CHENG WeiMing; WANG WeiSheng; JIANG Yan; ZHANG YiChi; WANG YongQin

    2007-01-01

    The Aksu River (the international river between China and Kirghiz) has become the main water source for the Tarim River. It significantly influences the Tarim River's formation, development and evolution.Along with the western region development strategy and the Tarim River basin comprehensive development and implementation, the research is now focused on the Aksu River basin hydrologic characteristic and hydrologic forecast. Moreover, the Aksu River is representative of rivers supplied with glacier and snow melt in middle-high altitude arid district. As a result, the research on predicting the river flow of the Aksu River basin has theoretical and practical significance. In this paper, considering the limited hydrometeorological data for the Aksu River basin, we have constructed four hydrologic forecast approaches using the daily scale to simulate and forecast daily runoff of two big branches of the Aksu River basin. The four approaches are the upper air temperature and the daily runoff correlation method, AR(p) runoff forecast model, temperature and precipitation revised AR(p) model and the NAM rainfall-runoff model. After comparatively analyzing the simulation results of the four approaches, we discovered that the temperature and precipitation revised AR(p) model, which needs less hydrological and meteorological data and is more predictive, is suitable for the short-term runoff forecast of the Aksu River basin. This research not only offers a foundation for the Aksu River and Tarim Rivers' hydrologic forecast, flood prevention, control and the entire basin water collocation, but also provides the hydrologic forecast reference approach for other arid ungauged basins.

  14. Spatial distribution of river dolphins, Inia geoffrensis (Iniidae), in the Araguaia River (central Brazil)

    OpenAIRE

    ARAÚJO, CLARYANA COSTA; Vera Maria Ferreira da Silva

    2014-01-01

    This study aimed to characterize the distribution of botos, Inia geoffrensis, along a 530 km stretch in the middle reaches of the Araguaia River (central Brazil). Data collection was conducted in May (lowering water season) and September (dry season) of 2009. The location and group size of botos were recorded, and the relative density was calculated. The river was divided into nine areas according to geomorphological features; these areas were later grouped into two (low and high) levels of s...

  15. Developing a broader scientific foundation for river restoration: Columbia River food webs

    OpenAIRE

    Naiman, Robert J.; Alldredge, J. Richard; Beauchamp, David A.; Bisson, Peter A.; Congleton, James; Charles J. Henny; Huntly, Nancy; Lamberson, Roland; Levings, Colin; Merrill, Erik N.; Pearcy, William G.; Bruce E. Rieman; Ruggerone, Gregory T.; Scarnecchia, Dennis; Smouse, Peter E.

    2012-01-01

    Well-functioning food webs are fundamental for sustaining rivers as ecosystems and maintaining associated aquatic and terrestrial communities. The current emphasis on restoring habitat structure—without explicitly considering food webs—has been less successful than hoped in terms of enhancing the status of targeted species and often overlooks important constraints on ecologically effective restoration. We identify three priority food web-related issues that potentially impede successful river...

  16. Operational river discharge forecasting in poorly gauged basins: the Kavango River basin case study

    DEFF Research Database (Denmark)

    Bauer-Gottwein, Peter; Jensen, Iris Hedegaard; Guzinski, R.;

    2015-01-01

    Operational probabilistic forecasts of river discharge are essential for effective water resources management. Many studies have addressed this topic using different approaches ranging from purely statistical black-box approaches to physically based and distributed modeling schemes employing data...... assimilation techniques. However, few studies have attempted to develop operational probabilistic forecasting approaches for large and poorly gauged river basins. The objective of this study is to develop open-source software tools to support hydrologic forecasting and integrated water resources management...

  17. ABOUT LOACH IN THE SAVA RIVER

    Directory of Open Access Journals (Sweden)

    D. Ivelić

    2007-07-01

    Full Text Available genus Cobitis. In the Sava river near Zagreb, two species of the genus Cobitis were recorded C. elongata and C. elongatoides. Both species live together in the mud covered slow flowing sections of the river. As no data on the biology of these two loach were found in literature, the aim of this study was to research the conditions of the loach from the Sava river. The fish were caught by electric gear on three locations in May 2006. Also, macroinvertebrates were collected and physical and chemical analyses of water were performed. Qualityof water of the Sava river is sufficient for growth, reproduction and presence of C. elongata, it is less so for C. elongatoides. Macroinvertebrates are present with 10 taxa at three investigated sites. Crustacea was dominant at Medsave site, Oligochaeta at Lijevi Dubrov~ak site and Diptera and Gastropoda at Setu{ site. There are some differences in morphometric parameters of both species, due to the differences in the body dimensions. Main differences occurred when measuring the value of prepectoral distance, the end of prepectoral distance and preventral distance of the fin. Condition factor of C. elongata was lower (0.61 than that of C. elongatoides (0.81. Length–mass relationships of C. elongata could be expressed by the following formula: W=0.0039xSL3,2063, and C. elongatoides W=0.0057xSL3,1872.

  18. Seepage investigations of the Clackamas River, Oregon

    Science.gov (United States)

    Lee, Karl K.

    2011-01-01

    Analysis of streamflow measurements and continuous records of streamflow provided insight into interaction of the groundwater system with the Clackamas River in northwestern Oregon. This report assesses gains and losses of the Clackamas River based on streamflow measurements made during previous hydrologic studies, decades of continuous streamflow data, and a detailed suite of streamflow measurements made in September 2006. Gains and losses were considered significant if, after accounting for tributary inflows and withdrawals, the difference in streamflow from a measurement site to the next site downstream exceeded the streamflow measurement uncertainty. Streamflow measurements made in 1987, 1992, and 1998 indicated minor gains and losses. Comparison of continuous records of late summer streamflow of the Clackamas River at Estacada to sites at Clackamas and Oregon City indicated gains in some years, and no losses. Analysis of streamflow measurements of the Clackamas River from Estacada to Oregon City during low-flow conditions in September 2006 enabled an estimation of gains and losses on a reach-by-reach scale; these gains and losses were attributable to the geomorphic setting. During late summer, most groundwater discharge occurs upstream of Estacada, and groundwater contributions to streamflow downstream of Estacada are minor.

  19. 33 CFR 117.739 - Passaic River.

    Science.gov (United States)

    2010-07-01

    ... signal if at least one hour advance notice is given to the drawtender at Upper Hack Bridge mile 6.9, across the Hackensack River at Secaucus, N.J. In the event the HX drawtender is at the Lower Hack...

  20. Enteric bacterial growth rates in river water.

    Science.gov (United States)

    Hendricks, C W

    1972-08-01

    Enteric bacteria, including stocked strains of pathogenic species and organisms naturally present in the stream, were capable of growth in a chemostat with autoclaved river water taken 750 m below a sewage outfall. Maximal specific growth rates for all organisms occurred at 30 C, whereas culture generation times ranged between 33.3 and 116 hr. Of the six laboratory strains of enteric species used, Escherichia coli and Enterobacter aerogenes grew at generation times of 34.5 and 33.3 hr, respectively, while the remaining Proteus, Arizona, Salmonella, and Shigella spp. reproduced at a rate two to three times slower than the coliforms. Little or no growth occurred in the water at incubation temperatures of 20 and 5 C, and death was observed for Salmonella senftenberg at 20 and 5 C and for E. aerogenes and Proteus rettgeri at 5 C. When enteric bacteria naturally present in the river water were employed in similar experiments, coliform bacteria demonstrated a generation time of approximately 116 hr, whereas fecal coliforms failed to grow. Growth of the bacteria from the river demonstrated a periodicity of approximately 100 hr, which suggests that much of the growth of these organisms in the chemostat may be on the glass surfaces. This phenomenon, however, was not observed with any of the stocked enteric species. Neither the stock cultures nor the aquatic strains were capable of growth in autoclaved river water taken above the sewage outfall at the three temperatures tested.