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Sample records for gemeinschaftskernkraftwerk neckar

  1. Introduction of a quality management system at the Gemeinschaftskernkraftwerk Neckar GMBH (GKN)

    International Nuclear Information System (INIS)

    Haug, W.; Graeber, U.

    1997-01-01

    In the course of commissioning unit II of the GKN nuclear power plant, a Quality Assurance Manual was introduced in 1988. The Quality Assurance Manual is essentially based on the quality assurance elements of KTA 1401; that is, the emphasis is on quality assurance procedures for safety relevant plant components. During the actual application of the Quality Assurance Manual, however, it soon became apparent that this one-dimensional approach to quality management is not sufficient for the efficient organization of the quality related operational processes and procedures. The management of GKN decided at the end of 1992 to carry out a revision of the Quality Assurance Manual, with the objective of using quality, within the meaning of DIN ISO 9001, as a comprehensive organizational element for all operational processes and procedures. BTB-Jansky GmbH, a consulting firm familiar with the operational processes and procedures was commissioned to revise the Quality Assurance Manual, to investigate the procedures and implement a quality management system. The introduction of the quality management system has made it possible for the quality relevant processes and procedures at GKN to be regulated comprehensively and in a systematically transparent and workable manner. The introduction of the quality management system took place within the framework of an efficiency raising programme. It becomes apparent from this that the introduction of a quality management system is able to provide economic benefits for the operator. (orig.)

  2. Continuous measurement of the rate of flow in turbines at the run-of-river power station at Lauffen/Neckar - experience gathered with long-term operation; Kontinuierliche Durchflussmessung an den Turbinen des Laufwasserkraftwerkes Lauffen/Neckar - Erfahrungen im Langzeitbetrieb

    Energy Technology Data Exchange (ETDEWEB)

    Schneider, K.

    1994-12-31

    The Gemeinschaftskernkraftwerke Neckar (GKN), of Neckarwestheim, is obliged to set up measuring devices for continuous flow measurement at the Lauffen barrage weir of the Neckar river, downstream of GKN. Four different measuring systems were installed at the Lauffen power plant for the continuous measurement of turbine flow rate as one of the partial flows through the barrage weir besides the weir and lock. The rate of flow is determined in each of the two turbines. A brief description of the measuring techniques is given, and the results from long-term operation are described. (orig./AKF) [Deutsch] Fuer die Gemeinschaftskernkraftwerk Neckar GmbH (GKN), Neckarwestheim, besteht die Auflage, in der Neckarstaustufe Lauffen als Unterlieger des GKN Messeinrichtungen zur kontinuierlichen Abflussermittlung zu schaffen. Fuer die kontinuierliche Messung des Turbinendurchflusses als einem der Teildurchfluesse durch die Staustufe neben Wehr- und Schleusendurchfluss wurden deshalb im Kraftwerk Lauffen vier verschiedene Messverfahren installiert. Die Durchflussbestimmung erfolgt dabei an jeder der beiden Turbinen aus. Im vorliegenden Beitrag werden die Messverfahren kurz beschrieben sowie die Ergebnisse im Langzeitbetrieb vorgestellt. (orig./AKF)

  3. Fish populations under stress. The example of the Lower Neckar river; Fischpopulationen unter Stress. Das Beispiel des Unteren Neckars

    Energy Technology Data Exchange (ETDEWEB)

    Braunbeck, Thomas; Brauns, Annika; Keiter, Steffen [Sektion Aquatische Oekologie und Toxikologie, Univ. Heidelberg (Germany); Hollert, Henner [Inst. fuer Umweltforschung (Biologie V), Lehr- und Forschungsgebiet Oekosystemanalyse, Rheinisch-Westfaelische Technische Hochschule Aachen, Aachen (Germany); Schwartz, Patrick [Basel Univ. (CH). Mensch-Gesellschaft-Umwelt (MGU)

    2009-04-15

    Background, aim, and scope: Reports about declines or unusual structures of fish populations in native aquatic systems in Central Europe and North America are in sharp contrast to an obvious improvement of general water quality. The Neckar River may serve as an example of a formerly severely contaminated freshwater system in Southern Germany, the ecological situation of which could be substantially improved over the last three decades. Nevertheless, there are still deficits in the composition of the fish fauna, which cannot be explained by conventional chemical-analytical, hydromorphological and limnological methodologies. Therefore, in search of explanations for ecological deficits, ecotoxicological investigations with an increasing focus on sediment contamination have been performed along the Lower Neckar River over a period of 10 years. In addition to sediment tests, fish populations were screened for genotoxic and embryotoxic effects as well as alterations in the structure of central metabolic organs such as the liver. Materials and methods: Roach (Rutilus rutilus) and gudgeon (Gobio gobio) from the Lower Neckar River were studied with respect to histo- and cytological alterations of the liver as well as the induction of genotoxicity in liver, gut, gills and blood cells by means of the comet and micronucleus assays. At the same time, both native sediments and acetonic sediment extracts were tested for toxicity to zebrafish (Danio rerio) embryos and permanent fish cell cultures. Results: Massive disturbances of the liver ultrastructure indicate severe stress in the fish from the Lower Neckar River despite good supply of nutrition. Both cyto- and embryotoxicity tests document a considerable toxic potential of sediments from the Lower Neckar River, and results of both the comet assay and the micronucleus test provide evidence of the presence of genotoxic agents in the sediments and their effects in fish. There has been no decrease of genotoxicity over the last 10

  4. Renewable energy and air pollution abatement in the Rhine-Neckar region. Assessment, potential, and perspectives of renewable energy sources in the Rhine-Neckar region; Klimaschutz durch Erneuerbare Energien in der Region Rhein-Neckar. Bestandsaufnahme, Potenziale und Entwicklungsperspektiven Erneuerbarer Energien im Wirtschaftsraum Rhein-Neckar

    Energy Technology Data Exchange (ETDEWEB)

    Hirschl, B.

    2001-12-01

    The study analyzed the situation, potential and obstacles of renewable energy sources and developed strategic recommendations on this basis for enhancing the use of renewables in the Rhein-Neckar region. [German] Gegenstand der nachfolgenden Untersuchung ist eine umfassende Bestandsaufnahme, Potenzial- und Hemmnisanalyse sowie die Entwicklung darauf basierender Strategieempfehlungen, die zu einer Initiative zur Foerderung Erneuerbarer Energien fuehren koennen. Dabei bilden die erstgenannten Bestandteile der Untersuchung die Basis fuer die Entwicklung von Vorschlaegen zur Strategieentwicklung, d.h. zur Identifizierung von inhaltlichen und konzeptionellen Vorschlaegen zur Ausgestaltung einer Initiative fuer Erneuerbare Energien in der Region Rhein-Neckar. (orig.)

  5. Hydraulic investigations for the construction of a fishway in Lauffen at the river Neckar; Hydraulische Untersuchungen zum Bau einer Fischaufstiegsanlage in Lauffen am Neckar

    Energy Technology Data Exchange (ETDEWEB)

    Heinzelmann, Christoph; Weichert, Roman; Wassermann, Stefanie [Bundesanstalt fuer Wasserbau, Karlsruhe (Germany)

    2013-03-01

    As service provider for the Federal Waterways and Shipping Administration (Wasser- und Schifffahrtsverwaltung des Bundes, WSV) the Federal Waterways Engineering and Research Institute (Bundesanstalt fuer Wasserbau, BAW) provides advice for the offices of the WSV regarding the river continuity of Federal waterways. In this context, the investigations of BAW concentrate on hydraulic and waterways engineering aspects. This article reports on current investigations for the construction of a fishway at the barrage Lauffen, River Neckar. Field investigations as well as physical and numerical model simulations are used. (orig.)

  6. Flood deposits and their heavy metal load - example of the Neckar river

    International Nuclear Information System (INIS)

    Hellmann, H.

    1993-01-01

    Flood deposits may develop from suspended solids under certain conditions, e.g. after the passage of a flood wave. Depending on the origin of the suspended material, the heavy metal load in these deposits varies considerably. Recent sediments deposited in the Neckar waterway after the flood of February/March 1990 are taken as an example to explain that it is necessary to consider the contamination load in relation to the grain size of the material. To this end, the heavy metal contents of the fine grain fraction (grain diameter [de

  7. Hydrogen-management in beyond design accident conditions in NPP Neckar 2

    International Nuclear Information System (INIS)

    Zaiss, W.

    1999-01-01

    Neckar 2 is a 1340 MWE 4-loop pressurized water reactor (PWR) of Siemens KONVOI type, located in the south of Germany. It was first connected to the grid in January 1989. Commercial operation started in April 1989. Task assignment: In Germany it was recommended by the Reactor Safety Commission (RSK) on December 17, 1997, to reequip passive autocatalytic recombiners for the controlling of the hydrogen problem. The removal of the hydrogen is an essential part which guarantees the integrity of the containment. The implementation of the recombiners is a further step for the decrease of the nuclear rest risk. The RSK confirmed, that the implementation of the passive autocatalytic recombiners is a safety measure for the controlled removal of the hydrogen in beyond design accident conditions. Assumption : Failure of the whole residual heat removal system (RHRS) and non sufficient effect of the systems which have been installed for beyond design accident conditions. Effect on the reactor coolant system (RCS): The reactor core will be damaged by non sufficient cooling with the output of hydrogen because all the specified emergency actions have failed. The overheating of the core is responsible for the production of hydrogen by the reaction of zirconium of the fuel-rod cladding with the water vapour. In case of nuclear superheating it would be possible that the reactor vessel would start smelting. The interacting between the core and the concrete, together with the armouring of the biological shield would also produce hydrogen. The hydrogen would escape together with the water vapour out of the leak and would spread out into the whole containment. Results : the number and the position of the different sized recombiners were determined on engineering judgement. the following 4 scenarios are representatively. The 4 scenarios were analyzed for in beyond design accident conditions with the MELCOR-Code: No. 1: Loss of main feedwater supply with primary feed and bleed. No. 2

  8. Changes in toxicity and Ah receptor agonist activity of suspended particulate matter during flood events at the rivers Neckar and Rhine - a mass balance approach using in vitro methods and chemical analysis.

    Science.gov (United States)

    Wölz, Jan; Engwall, Magnus; Maletz, Sibylle; Olsman Takner, Helena; van Bavel, Bert; Kammann, Ulrike; Klempt, Martin; Weber, Roland; Braunbeck, Thomas; Hollert, Henner

    2008-10-01

    As a consequence of flood events, runoff and remobilized sediments may cause an increase of ecotoxicologically relevant effects from contaminant reservoirs. Aquatic and terrestrial organisms as well as cattle and areas of settlement are exposed to dislocated contaminants during and after flood events. In this study, the impacts of two flood events triggered by intense rain at the rivers Neckar and Rhine (Southern Germany) were studied. Effects in correlation to flood flow were assessed at the river Neckar using samples collected at frequent intervals. River Rhine suspended particulate matter (SPM) was sampled over a longer period at normal flow and during a flood event. Three cell lines (H4L1.1c4, GPC.2D.Luc, RTL-W1) were used to compare Ah receptor agonist activity in different biotest systems. Multilayer fractionation was performed to identify causative compounds, focusing on persistent organic contaminants. Native water and SPM of flood events were collected at the river Neckar and at the monitoring station (Rheinguetestation, Worms, Germany) of the river Rhine. Water samples were XAD-extracted. SPM were freeze-dried and Soxhlet-extracted using acetone and finally dissolved in dimethyl sulfoxide. Resulting crude extracts were analyzed for cytotoxicity with the neutral red assay. Aryl hydrocarbon receptor (AhR) agonist activity was measured in a set of biological test systems (DR-CALUX, GPC.2D, and ethoxyresorufin-O-deethylase (EROD) assay) and different cell lines. In addition, crude extracts were fractionated using a combined method of multilayer (sequence of acidified silica layers) and carbon fractionation. Fractions from the multilayer fractionation contained persistent organic compounds (polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), and some polycyclic aromatic hydrocarbon (PAHs)); fractions from the carbon fractionation were separated into a PCDD/F and a PCB fraction. Dioxin-like activity of multilayer and

  9. Biblioteca en Marbach am Neckar - Alemania Federal

    Directory of Open Access Journals (Sweden)

    Kiefner, Jörg

    1973-12-01

    Full Text Available The Marbach Records Hall, used for the study of modem German literature, is connected to the Schiller Museum by a low terrace. The shape of the museum, similar to a castle, creates a relationship of subordination with all the surrounding structures. In this case, that subordination was the main factor conditioning the architectural design and heights of the new building. The building consists of several divided modules, in terrace form, arranged around the premises to be used. These modules are in turn made up of reading rooms and card catalogues. Next to the main entrance there is a lecture hall and a small coffee shop. With the exception of the lecture hall, the entire structure has a basement below it. The storage rooms and book and magazine storage spaces have been distributed on two floors underneath the card catalogue areas. Exposed concrete was used for the entire construction, both for the structure as well as for the interior and exterior surfaces, contrasting with the dark bronze colored aluminum bay windows.El Archivo Marbach, destinado al estudio de la literatura alemana moderna, está comunicado a través de una terraza baja con el Museo Schiller, cuya forma, semejante a un castillo, crea una relación de subordinación a todas las construcciones de alrededor. En este caso, dicha subordinación ha sido el factor dominante que ha condicionado la arquitectura y las alturas del nuevo edificio. Se compone de varios módulos divididos, en forma de terraza, ordenados alrededor de los locales destinados a los usuarios, compuestos a su vez por salas de lectura y de ficheros. Junto a la entrada principal se encuentran la sala de conferencias y una pequeña cafetería. Toda la construcción, excepto la sala de conferencias, dispone de sótano. Los almacenes y depósitos de libros y revistas se han distribuido en las plantas bajo las salas de ficheros. Se ha empleado hormigón visto en la totalidad de la construcción, tanto para la estructura como para las superficies interiores y exteriores, contrastando con los ventanales de aluminio de color bronce oscuro.

  10. Radiation protection in a nuclear power station

    International Nuclear Information System (INIS)

    Walter, K.H.

    1988-01-01

    For the personnel that is occupied with operation, monitoring, maintenance and repair work, working in a nuclear power station inevitably means spending a certain amount of time in areas exposed to radiation and handling radio-active materials. Effective radiation protection of these persons starts with the planning and designing the nuclear power station. The most important aspects of radiation protection in a nuclear power station are thorough preparation of the work, that is connected with exposure to radiation, appropriate and effective application of technical and administrative measures during the work, reliable and complete determination of the existing radiation level. The main objective in this respect is to keep the radiation level as low as possible, while using all reasonable means. This summary gives a description of radiation protection in the nuclear power plant and the experiences and results of the 10-year operation of the Gemeinschaftskernkraftwerk Neckar (GKN). (orig.) [de

  11. Experience with the loading and transport of fuel assembly transport casks, including CASTOR casks, and the radiation exposure of personnel

    International Nuclear Information System (INIS)

    Bentele, W.; Kinzelmann, T.

    1999-01-01

    In 1997 and 1998, six spent fuel assembly transports started from the nuclear power plant Gemeinschaftskernkraftwerk Neckar (GKN), using CASTOR-V19 casks. Professor Kuni of Marburg University challenged the statement made by the German Federal Office for Radiation Protection (Bundesamt fuer Strahlenschutz (BfS)) based on accepted scientific knowledge, according to which so-called CASTOR transports present no risk, either to the population or to the escorting police units. This paper shows that the collective dose during the loading of the CASTOR casks amounted to 4.5 mSv (gamma and neutrons) per cask at the most, and that the maximum individual dose amounted to 0.26 mSv. In addition to these doses, the collective dose during handling and transport must be considered: this amounted to 0.35 mSv (gamma and neutrons). The dose to the police escort was -2 (limit for surface contamination), presented degrees of contamination >4 Bq cm -2 upon reaching the Valognes/Cogema terminal. However, transport casks coming from French plants also revealed degrees of contamination >4 Bq cm -2 , as well as 'hot spots'. No such contamination was found on NTL 11 casks transported from the GKN to Sellafield. Neither was any increased contamination found upon the arrival of CASTOR-V19 casks transported from GKN to Gorleben or Ahaus. The partially sensationalist media reports were inversely proportional to the actual radiological relevance of the matter. The German Commission on Radiation Protection (SSK) confirmed that the radiological effect of such contaminated spent fuel transports is negligible. (author)

  12. Measures geared to maintain the competence of operating personnel at Grohnde nuclear power plant

    International Nuclear Information System (INIS)

    Bohr, H.

    1986-01-01

    Organizational structure of the German power plant 'Gemeinschaftskernkraftwerk Grohnde GmbH'. The plant characteristics of the tasks and duties and definition of competence. Measures to maintain competence. The experience by the realization of training programs to maintain competence. (orig.)

  13. Hybrid cooling tower Neckarwestheim 2 cooling function, emission, plume dispersion

    International Nuclear Information System (INIS)

    Braeuning, G.; Ernst, G.; Maeule, R.; Necker, P.

    1990-01-01

    The fan-assisted hybrid cooling tower of the 1300 MW power plant Gemeinschafts-Kernkraftwerk Neckarwestheim 2 was designed and constructed based on results from theoretical and experimental studies and experiences from a smaller prototype. The wet part acts in counterflow. The dry part is arranged above the wet part. Each part contains 44 fans. Special attention was payed to the ducts which mix the dry into the wet plume. The cooling function and state, mass flow and contents of the emission were measured. The dispersion of the plume in the atmosphere was observed. The central results are presented in this paper. The cooling function corresponds to the predictions. The content of drifted cooling water in the plume is extremely low. The high velocity of the plume in the exit causes an undisturbed flow into the atmosphere. The hybrid operation reduces visible plumes strongly, especially in warmer and drier ambient air

  14. Energy storage units on tram and light-rail vehicles. The first series project; Energiespeicher auf Strassen- und Stadtbahnfahrzeugen. Das erste Serienprojekt

    Energy Technology Data Exchange (ETDEWEB)

    Klohr, Markus; Maroschik, Andreas [Bombardier Transportation, Mannheim (Germany)

    2012-08-15

    In 2007, Bombardier received from the Rhein-Neckar-Verkehr GmbH (RNV) the order to deliver 19 vehicles with a drive system including an energy storage unit. This article describes the various types of vehicles so far delivered, the concept of the driving system with energy store, and the experience gathered in passenger transport service. Presented and discussed are the measured energy savings and its influential factors. (orig.)

  15. Operational maintenance system for a proven water way; Operatives Unterhaltungssystem fuer eine bewaehrte Wasserstrasse

    Energy Technology Data Exchange (ETDEWEB)

    Huber, Joerg; Wirth, Matthias [WSA Heidelberg (Germany)

    2010-07-01

    The Neckar waterway was expanded into a shipping channel with 27 barrages over a distance of about 203 km from 1921 to 1968. Cargo ships up to 105.50 m in length and 11.45 m wide can travel the Neckar. This waterway has the densest concentration of barrages in Germany. Statistically the river has 13.5 large weir and lock systems that must be operated and maintained for every 100 km. Weirs and locks are between approx. 75 and 85 years old. In addition to major preservation and expansion projects, they thus need a well-organized, deliberate maintenance program to continue in order to operate reliably and safely. Beyond its economic significance as a mode of transportation (about 8 million tons of goods per year), the Neckar primarily plays an ecological role as a habitat for fish and small animals. The Heidelberg Water and Shipping Authority maintains the weirs and locks based on the following 4 pillars: scheduled maintenance, structural inspections, a weir and lock repair program, and the development of new systems. All four areas are equally valuable components of the functional maintenance system. The experience gained by the Heidelberg Water and Shipping Authority in maintaining hydraulic structures over the past 85 years shows that these structures can be operated in the long term by means of a scheduled and well-defined maintenance system. (orig.)

  16. Altstadtflair, Kunst und Kultur. Tourismus(potenziale) in und um die Universitätsstadt Tübingen

    Science.gov (United States)

    Megerle, Heidi Elisabeth

    2017-09-01

    The historic university town of Tübingen offers a high tourist potential due to art, culture, the river Neckar and the old-town-atmosphere. Whereas day tourism is above average and plays an economically important role, overnight tourism is still under average despite a constant upward trend. The current tourism strategy recommends a strengthening of overnight and individual quality tourism as well as seasonal and spatial equalisation of tourist flows and in addition an increased networking with the surrounding area, being highly attractive due to the Biosphere Reserve, the Geopark and the Outletcity of Metzingen.

  17. Defense in Clausewitz’s ’On War’ and in FM (Field Manual) 100-5 and HDv 100/100.

    Science.gov (United States)

    1985-06-07

    use of the engagement for war as its purpose.- 121bid., p. 158. 13 1bid., p. 159. 14]bid., p. 363. Erich Vad, Carl von Clausewitz Seine Bedeutung heute ...Clausewitz, On War, p. 382. 2 2 1bid., p. 498. 2 3Erich Vad. Carl von Clausewitz Seine Bedeutung heute . Verlag E. S. Mittler & Sohn, Herford und Bonn, 1984, p...Auflage 1981, 1976 by Bechtle Verlag, Esslingen am Neckar, p. 333. Erich Vad, Carl von Clausewitz Seine Bedeutuno heute , Jan 23, p. 67. Edward Mead

  18. Fish fauna as a biological indicator in the evaluation of morphological changes in the large rivers of Baden-Wuerttemberg. Development and testing of a method

    International Nuclear Information System (INIS)

    Weibel, U.

    1994-01-01

    The purpose of the project is to develop further a method for the quantification of fishes in the Rhine and Neckar rivers, which will permit permanent observation of the fish fauna in these rivers. The method makes use of the fact that fish arrive in large numbers at the cooling water take-off points of large thermal power stations and that they may be counted and their numbers evaluated. As sampling carried out at three power stations in the northern part of the Upper Rhine from 1989 to 1990 shows, it is indispensable to extend the current range of sampling techniques by the described method.-The investigation comprises two stages: In stage 1, thermal power stations on the southern part of the Upper Rhine and the Neckar, which borrow at least 10 m 3 /s of cooling water, are tested as to their suitability as sampling stations. In phase 2 it is envisaged to develop further and test the initial method. The devices used are the coarse and fine screens and sieve belts of the take-off points. The hydrological and chemico-physical parameters are recorded in standardized form by the power plant operators and are available for evaluation. (orig./VHE) [de

  19. [Behavioral symptoms in preschool children at the time of school entrance from the perspective of parents--data regarding prevalence and risk factors in an epidemiological study].

    Science.gov (United States)

    Haffner, Johann; Esther, Cornelia; Münch, Horst; Parzer, Peter; Raue, Britta; Steen, Rainer; Klett, Martin; Resch, Franz

    2002-11-01

    Behavioral and emotional problems based on parents information from the Child Behavior Checklist (CBCL) were investigated in a large epidemiological sample of 4363 six year old pre-school children from the area of Heidelberg and Rhein-Neckar county. An overview about symptom frequencies of boys and girls is given, taking age specific evaluations into account. Considering symptoms and syndromes, externalizing and attention problems show high prevalence, especially for boys. Family problems are the most important predictors of child global symptomatology, explaining about 10% of variance of the CBCL total score. Other factors like gender, chronical illness, adverse living conditions, family constellation or amount of TV consumption prove as additional independent predictors. An overall model explains about 20% of variance of child symptomatology. Results are discussed from the view of normal child development, developmental psychopathology, changing norms and altered socio-cultural conditions.

  20. A sampling scheme to assess persistence and transport characteristics of xenobiotics within an urban river section

    Science.gov (United States)

    Schwientek, Marc; Guillet, Gaelle; Kuch, Bertram; Rügner, Hermann; Grathwohl, Peter

    2014-05-01

    Xenobiotic contaminants such as pharmaceuticals or personal care products typically are continuously introduced into the receiving water bodies via wastewater treatment plant (WWTP) outfalls and, episodically, via combined sewer overflows in the case of precipitation events. Little is known about how these chemicals behave in the environment and how they affect ecosystems and human health. Examples of traditional persistent organic pollutants reveal, that they may still be present in the environment even decades after they have been released. In this study a sampling strategy was developed which gives valuable insights into the environmental behaviour of xenobiotic chemicals. The method is based on the Lagrangian sampling scheme by which a parcel of water is sampled repeatedly as it moves downstream while chemical, physical, and hydrologic processes altering the characteristics of the water mass can be investigated. The Steinlach is a tributary of the River Neckar in Southwest Germany with a catchment area of 140 km². It receives the effluents of a WWTP with 99,000 inhabitant equivalents 4 km upstream of its mouth. The varying flow rate of effluents induces temporal patterns of electrical conductivity in the river water which enable to track parcels of water along the subsequent urban river section. These parcels of water were sampled a) close to the outlet of the WWTP and b) 4 km downstream at the confluence with the Neckar. Sampling was repeated at a 15 min interval over a complete diurnal cycle and 2 h composite samples were prepared. A model-based analysis demonstrated, on the one hand, that substances behaved reactively to a varying extend along the studied river section. On the other hand, it revealed that the observed degradation rates are likely dependent on the time of day. Some chemicals were degraded mainly during daytime (e.g. the disinfectant Triclosan or the phosphorous flame retardant TDCP), others as well during nighttime (e.g. the musk fragrance

  1. Ecotoxicological sediment survey of large German rivers; Oekotoxikologische Sedimentkartierung der grossen Fluesse Deutschlands

    Energy Technology Data Exchange (ETDEWEB)

    Duft, M.; Tillmann, M. [Internationales Hochschulinstitut Zittau (Germany); Oehlmann, J. [Frankfurt Univ. (Germany). Zoologisches Inst., Abt. Oekologie und Evolution

    2003-05-01

    In this project, a nation-wide, ecotoxicologically-based sediment survey was carried out. For this purpose, a total of about 200 sediment samples from 12 selected large German rivers (Danube, Elbe, Ems, Main, Mosel, Neckar, Neisse, Odra, Rhine, Ruhr, Saar and Weser) were analysed with regard to abiotic parameters (heavy metals, PAH, organic carbon content, particle size) and also by means of two biological test systems with benthic invertebrates (nematode test with the roundworm Caenorhabditis elegans and chironomid test with the non-biting midge Chironomus riparius). Subsequently, this comprehensive data set was analysed statistically. By means of an iterative method, a five-stage, statistically-derived assessment concept which is founded on the results of the biological tests, was developed following the EU water framework directive. In general, the classification with the nematode test turned out to be the more sensitive method. A principal component analysis and correlations showed that the parameters of both biotests provide different information which suggests a combined use of both tests. Correlations also indicate a connection of biotest results and abiotic parameters (organic carbon content, particle size and heavy metal contamination). (orig.) [German] Im Projekt wurde eine bundesweite oekotoxikologische Sedimentkartierung grosser Fliessgewaesser durchgefuehrt. Dazu wurden insgesamt etwa 200 Sedimentproben aus 12 ausgewaehlten grossen Fluessen Deutschlands (Donau, Elbe, Ems, Main, Mosel, Neckar, Neisse, Oder, Rhein, Ruhr, Saar und Weser) auf ihre abiotischen Parameter (Schwermetalle, PAK, organischer Kohlenstoffgehalt, Korngroesse) hin analysiert sowie mit zwei biologischen Testverfahren mit benthischen Invertebraten (Nematodentest mit dem Fadenwurm Caenorhabditis elegans und Chironomidentest mit der Zuckmuecke Chironomus riparius) untersucht. Dieses umfangreiche Datenmaterial wurde anschliessend statistisch ausgewertet und mit Hilfe eines iterativen

  2. Vol. 4 in the series: Site profiles of persistent chlorinated hydrocarbons - cause-oriented monitoring in aquatic media; Pestizide aus der Reihe der persistenten chlorierten Kohlenwasserstoffe in Gewaessern der Rhein-Region - Ergebnisse nachhaltiger Steuerungen von Wirtschaft und Politik. Bd. 4 der Reihe: Standortprofile persistenter chlorierter Kohlenwasserstoffe - ursachenorientiertes Monitoring in aquatischen Medien

    Energy Technology Data Exchange (ETDEWEB)

    Heinisch, E.; Kettrup, A.; Bergheim, W.; Wenzel, S.

    2003-07-01

    Evaluating the analytical data of DDT and its metabolites, the isomers of HCH as well as (sometimes) of aldrin and dieldrin in surface water, suspended matter, eels, breams and roaches from the rivers Rhine, Neckar, Kocher, Enz, Main (upto km 360), Weschnitz, Modau, Schwarzbach, Hengstbach, Grundbach, Nidda, Rodau, Kinzig, Werra, Diemel, Lahn, Nahe, Mosel, Sauer, Saar, Ahr, Kyll, Sieg and Laacher See distance profiles (partly from Konstanz till Markermeer) and time series (partly from 1984-2001) were elaborated. The primary data come from about 15 mainly regional investigation departments, the IKSR and the Environmental Specimen Bank. The chemical enterprises in Rheinfelden, Grenzach, Ludwigshafen, Lampertheim, Gernsheim, Darmstadt, Hoechst, Kelsterbach, Offenbach, Ingelheim, Loelsdorf, Leverkusen, Elberfeld, Krefeld-Uerdingen and Huels could partly be made transparent by the course of the sDDT and sHCH values and the profiles of the constituents and isomers, resp., in the distance profiles (especially from the river Rhine) mainly from 1990/92. The corresponding graph for the year 2000 shows that there is no longer a human and ecotoxicological relevance of the compounds to be expected. (orig.)

  3. The Baden-Wuerttemberg office for listed buildings in Esslingen - architecture as a holistic approach; Landesdenkmalamt Baden-Wuerttemberg in Esslingen - Architektur als integrativer Ansatz

    Energy Technology Data Exchange (ETDEWEB)

    Reutter, O.

    2003-07-01

    Odilo Reutter Dipl. Ing., Architekt, BDA, Rathausplatz 7, 73728 Esslingen am Neckar Tel.: 0711/3508622, Fax: 0711/354450, E-mail: reutter rate at reutter-architektur.de. The headquarters of the regional office for listed buildings will move to the former Schelztor-Gymnasium in Esslingen in an attempt to bring the branch offices spread throughout the country under one roof. As late as the nineteenth century, the medieval city of Esslingen was characterised by city walls, towers and moats. With the advent of industrialisation, the city expanded to include the Weststadt district and its walls were dismantled and new buildings erected. The former Schelztor-Gymnasium stands at the historic crossroads of the city's expansion. A new detached building, in line with the existing one, will be added to the former nineteenth-century listed school building to accommodate ultra modern workspaces in laboratories, workshops and offices with high air-conditioning and lighting standards. The building will fulfil the following urban functions: 1. Extension of the existing historic parts of the building. 2. Creation of a link between the building and the Weststadt district as it was at the time of the city's nineteenth-century expansion 3. Spatial delimitation of the Martinstrasse axis. 4. Pivotal function; abandonment of the block development in favour of the single building block. (orig.)

  4. Synesthetic associations and psychosensory symptoms of temporal epilepsy

    Directory of Open Access Journals (Sweden)

    Neckar M

    2016-01-01

    Full Text Available Marcel Neckar, Petr Bob Center for Neuropsychiatric Research of Traumatic Stress, Department of Psychiatry, First Faculty of Medicine, Charles University, Prague, Czech Republic Background: Synesthesia manifests as unusual associative connections that may cause intriguing experiences due to various cross-modal connections, for example, a sound may be experienced as color. Several findings indicate that temporal lobe seizures or seizure-like conditions and increased excitability may influence various unusual cross-sensory links and synesthetic experiences.Methods: In this context, the purpose of this study is to find relationships between word–color associations and psychopathological symptoms related to temporal lobe epilepsy and limbic irritability (Limbic System Checklist [LSCL-33], symptoms of traumatic stress (Trauma Symptoms Checklist [TSC-40], and depressive symptoms (Beck Depression Inventory [BDI-II] in 71 participants (mean age =25.23 years recruited from the general population. The whole sample included two subgroups according to levels of psychosensory and affective symptoms related to temporal epilepsy measured by LSCL-33.Results: The results in both subgroups indicate specific words correlated with the scores of psychopathological symptoms measured by LSCL-33, BDI-II, and TSC-40. Significant Spearman correlations have been predominantly found in the subgroup of participants with higher levels of LSCL-33.Conclusion: The results indicate a specific synesthetic-like mechanism in association processes that reflects psychopathological symptoms related to increased temporo-limbic excitability. Keywords: word associations, colors, stress, synesthesia, temporal lobe epilepsy, limbic irritability

  5. Legal aspects of public participation in the planning/licensing of environmentally related large-scale projects

    International Nuclear Information System (INIS)

    Kurz, A.

    1991-01-01

    A variety of legal problems arise in the planning/licensing of environmentally related large-scale projects associated with the control and evaluation of technical conditions and the ramifications in social and legal policy of the acceptance of, and resistance to, such projects. On the basis of a number of partial studies e.g. of the licensing procedure of a nuclear power plant (Neckar-2 reactor) the author examines the legal aspects of public participation in the administrative procedures of licensing/plans approval. The dichotomy of law and technology is covered, and public participation in administrative procedures is derived legally from the basic constitutional rights and the principle of fair hearing. After an outline of specific administrative procedures, public participation as part of administrative procedures is included in the broad legal framework of licensing/plans approval of environmentally related large-scale projects. The author concludes that public participation, within the framework of the basic decisions established by legislature, is not a tool to be used in deciding basic political conflicts. Instead, public participations in the application of law serves to protect the rights of the individual by ensuring fair proceedings paying attention to the subjective rights of the individual. As it is unable to decide political conflicts, it is also an unsuitable means of establishing of basic societal consensus, or of seeking acceptance of large-scale projects. (orig./HP) [de

  6. Registration of tritium amounts introduced into surface waters by precipitation for the purpose of making balance of emissions resulting from nuclear facilities. Erfassung der ueber den Niederschlag in die Oberflaechengewaesser eingebrachten Tritiumanteile zwecks Bilanzierung der aus kerntechnischen Anlagen resultierenden Emissionen

    Energy Technology Data Exchange (ETDEWEB)

    1981-01-01

    In the interval 1974 to 1980 the T contents in monthly precipitation and surface water samples from widely distributed sampling stations were determined. Besides the specific meteorologic and hydrologic peculiarities, the particular river basins also show characteristic features concerning the distribution and the transport of T to be found here. Therefore, regional influences of meteorologic, hydrologic but also anthropologic kind are unmistakable. During the mentioned interval, the whole T contents were continuing retrograde, whereby the content in precipitation declined more rapidly than in surface waters. Since a few years the T contents of most water courses exceed those of the precipitations. Comparing with these, the periodic variation in the T content of diverse water courses is hardly perceptible. The T loading of the surface and the T carriage or output were defined primarily by the corresponding precipitation and outflow quantities, respectively. Compared with precedent years, the diminution of the T output has slowed down at the considered interval. For the rivers Rhine and Neckar, the mostly loaded waters by releases from nuclear facilities (10-15%), a stagnation has already occurred. For the other main receiving river courses the burden due to artificial emissions is small in comparison.

  7. Teleradiology applications with DICOM-e-mail

    International Nuclear Information System (INIS)

    Weisser, G.; Ruggiero, S.; Runa, A.; Engelmann, U.; Schroeter, A.; Baur, S.; Walz, M.

    2007-01-01

    For the connection of several partners to a Dicom-e-mail based teleradiology network concepts were developed to allow the integration of different teleradiology applications. The organisational and technical needs for such an integration were analysed. More than 60 institutions including 23 hospitals in the Rhein-Neckar-Region, Germany were connected. The needed functionality was grouped in six teleradiology applications (emergency consultation, tele-guided examinations, expert consultations, cooperative work, scientific cooperations and homework with on call services) and their technical and organisational needs according to availability, speed of transfer, workflow definitions and data security needs was analysed. For the local integration of teleradiology services the setup and workflow is presented for a standalone teleradiology workstation and a server based teleradiology gateway. The line type needed for different groups of applications and users is defined. The security concept and fallback strategies are laid out, potential security problems and sources of errors are discussed. The specialties for the emergency teleradiology application are presented. The DICOM-e-mail protocol is a flexible and powerful protocol that can be used for a variety of teleradiology applications. It can meet the conditions for emergency applications but is limited if synchronous applications like teleconferences are needed. (orig.)

  8. Calibration of a distributed hydrologic model for six European catchments using remote sensing data

    Science.gov (United States)

    Stisen, S.; Demirel, M. C.; Mendiguren González, G.; Kumar, R.; Rakovec, O.; Samaniego, L. E.

    2017-12-01

    While observed streamflow has been the single reference for most conventional hydrologic model calibration exercises, the availability of spatially distributed remote sensing observations provide new possibilities for multi-variable calibration assessing both spatial and temporal variability of different hydrologic processes. In this study, we first identify the key transfer parameters of the mesoscale Hydrologic Model (mHM) controlling both the discharge and the spatial distribution of actual evapotranspiration (AET) across six central European catchments (Elbe, Main, Meuse, Moselle, Neckar and Vienne). These catchments are selected based on their limited topographical and climatic variability which enables to evaluate the effect of spatial parameterization on the simulated evapotranspiration patterns. We develop a European scale remote sensing based actual evapotranspiration dataset at a 1 km grid scale driven primarily by land surface temperature observations from MODIS using the TSEB approach. Using the observed AET maps we analyze the potential benefits of incorporating spatial patterns from MODIS data to calibrate the mHM model. This model allows calibrating one-basin-at-a-time or all-basins-together using its unique structure and multi-parameter regionalization approach. Results will indicate any tradeoffs between spatial pattern and discharge simulation during model calibration and through validation against independent internal discharge locations. Moreover, added value on internal water balances will be analyzed.

  9. Betrayal Betrayal

    Directory of Open Access Journals (Sweden)

    Suzana Bornéo Funck

    2008-04-01

    Full Text Available The sharp clear whistle of the TEE nervously pierced the immense darkness that, like a medieval cloak, covered the valley of the Neckar. Fast and efficient, the train Advanced toward the Hauptbahnhof, where it was received with the ceremonious formalities of a centuriesold ritual. Along the platform, on worn-out benches, a few sleepy-eyed travelers patiently waited in solemn silent respect. Out of the second-class car, among throngs of backpackers in faded jeans and tennis shoes, a woman, alone, almost Inconspicuously descended onto the platform. She was small, girlish-looking, but her trenchcoat betrayed a certain caution, a preparedness that clashed with the adventurous freedom of youth. She glanced around her and, unnoticed but for a polite nod from the train officer, proceeded toward the central lobby. Her short hair bounced to the rhythm of decided steps, made somewhat uneven by the weight of the shoulder strap that sustained her one piece of luggage. "Need some help, miss?" Ramona thought she might have heard. Nonsense, she soon added in her mind with a condescending smile. That was a voice from the past when, eager and excited, she attracted companionship by the sheer curiosity stamped on her face. Now, in her midthirties, at that age when naiveté and innocence become dangerously incongruous, she had learned to conceal the spontaneity and trust with which she had once embraced the world. Her face showed no excitement, no awe at the foreigness of the place, not even the fear that rose within her as she faced the Bahnhof door and acknowledged the emptiness of the station plaza outside. The sharp clear whistle of the TEE nervously pierced the immense darkness that, like a medieval cloak, covered the valley of the Neckar. Fast and efficient, the train Advanced toward the Hauptbahnhof, where it was received with the ceremonious formalities of a centuriesold ritual. Along the platform, on worn-out benches, a few

  10. Ejecución de puentes pretensados por voladizos sucesivos (Continuación

    Directory of Open Access Journals (Sweden)

    Fernández Casado, Carlos

    1964-03-01

    Full Text Available The system of construction whereby successive extensions of a cantilevered structure are carried out has made it possible to extend, to an extraordinary extent, the free spans of straight section prestressed concrete bridges. At present the Bendorf bridge is being constructed, whose central span is 208 m long. This system was first used in Brazil, for the construction of an ordinary reinforced concrete bridge over the river Peixe. But the method fell into disuse, except for very few exceptions, until Firsterwalder again brought it up to date 20 years later, when building the Neckar bridge, made of prestressed concrete. With this new technique all the advantages of the system could be exploited, as well as achieving a very rapid construction. This constructional procedure leads directly to the structural type known as compensated cantilevers. T shaped cells are attached together by means of prestressing cables to form advancing cantilevers. Thereby a, total bridge structure is formed, whose span is twice that of each cantilevered half. This method can be applied to other bridge types, such as dintels with overhanging sections (this was the first new application, single span portal frames, T portal frames, continuous beams, etc. The typical constructional method is to move the formwork, which is anchored and cantilevered beyond the constructed part. A weekly progress of 3,50 m is normal. It is also possible to employ prefabricated sections, which are successively joined to the ones already in place.El sistema de construcción por voladizos sucesivos ha permitido ampliar, de modo extraordinario, las luces de los puentes de tramo recto de hormigón pretensado. Actualmente se construye el Puente de Bendorf con tramo central de 208 metros. Se utilizó por primera vez en Brasil para la construcción de un puente de hormigón armado normal sobre el río Peixe, pero quedó en desuso—salvo poquísimas excepciones—hasta que lo volvió a poner a punto

  11. Pasarela suspendida en Stuttgart

    Directory of Open Access Journals (Sweden)

    Leonhardt, Fritz

    1963-06-01

    Full Text Available Following the gardening exhibition held in Stuttgart in 1961, the parks and gardens along the river Neckar have been greatly improved and modified, and as there is a considerable pedestrian traffic in this zone, it became necessary to build a footbridge to cross one of the main roadways. This footbridge leads on one side towards the station and on the other in the direction of the Theatre Palace. A public competition was organised to find the best design for this structure, and various firms submitted projects. The chosen one consists of a suspended, metal, flattened arch structure, and a thin walking deck. The arch has 90 ms span, and approach ramps, since the large number of pedestrians precluded the use of steps. The arched box girder is 0.5 ms deep and 5.50 ms wide. The beam is continuous, and hangs from cables which are attached at five points of the bridge, at points separated from each other 18, 17, 17, 17 and 18 ms. These cables run over a metal pillar. To give the pillar greater stability, a number of piles were driven into the ground, and the foundation block for the pillar was placed on these piles. Although the soil is not sufficiently stable to avoid small settlements of the foundations, this is not too important, since the structure is suspended, and small settlements, of even a few centimetres, would not modify the strength and stability of the project.Como consecuencia de la exposición de jardinería, celebrada en la ciudad de Stuttgart en 1961, los jardines y parques que se extienden hacia el río Neckar han experimentado una profunda modificación, y, como en esta zona el tráfico de peatones es de consideración, se ha creído necesario levantar una pasarela que cruce una avenida de gran circulación rodada. Este paso superior se bifurca, a un lado, en dos direcciones distintas cuyas rampas se orientan: una hacia la estación y la otra hacia la zona del palacio de la Diputación y Teatros. La estructura se sacó a concurso p

  12. Ejecución de puentes pretensados por voladizos sucesivos

    Directory of Open Access Journals (Sweden)

    Fernández Casado, Carlos

    1964-02-01

    Full Text Available The system of construction whereby successive extensions of a cantilevered structure are carried out has made it possible to extend, to an extraordinary extent, the free spans of straight section prestressed concrete bridges. At present the Bendorf bridge is being constructed, whose central span is 358 m long. This system was first used in Brazil, for the construction of an ordinary reinforced concrete bridge over the river Peixe. But the method fell into disuse, except for very few exceptions, until Firsterwalder again brought it up to date 20 years later, when building the Neckar bridge, made of prestressed concrete. With this new technique all the advantages of the system could be exploited, as well as achieving a very rapid construction. This constructional procedure leads directly to the structural type known as compensate cantilevers. T shaped cells are attached together by means of prestressing cables to form advancing cantilevers. Thereby a total bridge structure is formed, whose span is twice that of each cantilevered half. This method can be applied to other bridge types, such as dintels with overhanging sections (this was the first new application, single span portal frames, T portal frames, continuous beams, etc. The typical constructional method is to move the formwork, which is anchored and cantilevered beyond the constructed part. A weekly progress of 3,50 m is normal. It is also possible to employ prefabricated sections, which are successively joined to the ones already in place. (Owing to the length of this article, it will be published in several successive issues.El sistema de construcción por voladizos sucesivos ha permitido ampliar, de modo extraordinario, las luces de los puentes de tramo recto de hormigón pretensado. Actualmente se construye el puente de Bendorf con tramo central de 258 metros. Se utilizó por primera vez en Brasil para la construcción de un puente de hormigón armado normal sobre el río Peixe, pero

  13. Ejecución de puentes pretensados por voladizos sucesivos

    Directory of Open Access Journals (Sweden)

    Fernández Casado, Carlos

    1963-12-01

    Full Text Available The system of construction whereby successive extensions of a cantilevered structure are carried out has made it possible to extend, to an extraordinary extent, the free spans of straight section prestressed concrete bridges. At present the Bendorf bridge is being constructed, whose central span in 258 ms long. This system was first used in Brazil, for the construction of an ordinary reinforced concrete bridge over the river Peixe. But the method fell into disuse, except for very few exceptions, until Firsterwalder against brought it up to date 20 years later, when building the Neckar bridge, made of prestressed concrete. With new technique all the advantages of the system could be exploited, as well as achieving a very rapid construction. This constructional procedure leads directly to the structural type known as compensated cantilevers. T shaped cells are attached together by means of prestressing cables to form advancing cantilevers. Thereby a total bridge structure is formed, whose span is twice that of each cantilevered half. This method can be applied to other bridge types, such as dintels with overhanging sections (this was the first new application, single span portal frames, T portal frames, continuous beams, etc. The typical constructional method is to move the formwork, which is anchored and cantilevered beyond the constructed part. A weekly progress of 3,50 ms is normal. It is also possible to employ prefabricated sections, which are successively joined to the ones already in place. (Owing to the length of this article, it will be published in several successive issues.El sistema de construcción por voladizos sucesivos ha permitido ampliar, de modo extraordinario, las luces de los puentes de tramo recto de hormigón pretensado. Actualmente se construye el puente de Bendorf con tramo central de 258 metros. Se utilizó por primera vez en Brasil para la construcción de un puente de hormigón armado normal sobre el río Peixe, pero

  14. Hospitalizations during the last months of life of nursing home residents: a retrospective cohort study from Germany

    Directory of Open Access Journals (Sweden)

    Specht-Leible Norbert

    2006-06-01

    Full Text Available Abstract Background To describe hospitalisations of nursing home (NH residents in Germany during their last months of life. Methods Retrospective cohort study on 792 NH residents in the Rhine-Neckar region in South-West Germany, newly institutionalized in the year 2000, who died until the study end (December 2001. Baseline variables were derived from a standardized medical examination routinely conducted by the medical service of the health care insurance plans in Germany. Information on hospitalisations and deaths was extracted form records of the pertinent health insurance plans. Results NH residents who died after NH stay of more than 1 year spent 5.8% of their last year of life in hospitals. Relative time spent in hospitals increased from 5.2% twelve months before death (N = 139 persons to 24.1% in their last week of life (N = 769 persons. No major differences could be observed concerning age, gender or duration of stay in NH. Overall, 229 persons (28.9% died in hospital. Among these, the last hospital stay lasted less than 3 days for 76 persons (31.9%. Another 25 persons (3.2% died within three days after hospital discharge. Conclusion Our study indicates that proximity of death is the most important driver of health care utilization among NH residents. The relation of age or gender to health care expenditures seem to be weak once time to death is controlled for. Duration of NH stay does not markedly change rates of hospitalisation during the last months of life.

  15. Robust estimation of hydrological model parameters

    Directory of Open Access Journals (Sweden)

    A. Bárdossy

    2008-11-01

    Full Text Available The estimation of hydrological model parameters is a challenging task. With increasing capacity of computational power several complex optimization algorithms have emerged, but none of the algorithms gives a unique and very best parameter vector. The parameters of fitted hydrological models depend upon the input data. The quality of input data cannot be assured as there may be measurement errors for both input and state variables. In this study a methodology has been developed to find a set of robust parameter vectors for a hydrological model. To see the effect of observational error on parameters, stochastically generated synthetic measurement errors were applied to observed discharge and temperature data. With this modified data, the model was calibrated and the effect of measurement errors on parameters was analysed. It was found that the measurement errors have a significant effect on the best performing parameter vector. The erroneous data led to very different optimal parameter vectors. To overcome this problem and to find a set of robust parameter vectors, a geometrical approach based on Tukey's half space depth was used. The depth of the set of N randomly generated parameters was calculated with respect to the set with the best model performance (Nash-Sutclife efficiency was used for this study for each parameter vector. Based on the depth of parameter vectors, one can find a set of robust parameter vectors. The results show that the parameters chosen according to the above criteria have low sensitivity and perform well when transfered to a different time period. The method is demonstrated on the upper Neckar catchment in Germany. The conceptual HBV model was used for this study.

  16. Using environmental tracers and transient hydraulic heads to estimate groundwater recharge and conductivity

    Science.gov (United States)

    Erdal, Daniel; Cirpka, Olaf A.

    2017-04-01

    Regional groundwater flow strongly depends on groundwater recharge and hydraulic conductivity. While conductivity is a spatially variable field, recharge can vary in both space and time. None of the two fields can be reliably observed on larger scales, and their estimation from other sparse data sets is an open topic. Further, common hydraulic-head observations may not suffice to constrain both fields simultaneously. In the current work we use the Ensemble Kalman filter to estimate spatially variable conductivity, spatiotemporally variable recharge and porosity for a synthetic phreatic aquifer. We use transient hydraulic-head and one spatially distributed set of environmental tracer observations to constrain the estimation. As environmental tracers generally reside for a long time in an aquifer, they require long simulation times and carries a long memory that makes them highly unsuitable for use in a sequential framework. Therefore, in this work we use the environmental tracer information to precondition the initial ensemble of recharge and conductivities, before starting the sequential filter. Thereby, we aim at improving the performance of the sequential filter by limiting the range of the recharge to values similar to the long-term annual recharge means and by creating an initial ensemble of conductivities that show similar pattern and values to the true field. The sequential filter is then used to further improve the parameters and to estimate the short term temporal behavior as well as the temporally evolving head field needed for short term predictions within the aquifer. For a virtual reality covering a subsection of the river Neckar it is shown that the use of environmental tracers can improve the performance of the filter. Results using the EnKF with and without this preconditioned initial ensemble are evaluated and discussed.

  17. Multivariate assimilation of coarse scale soil moisture, cosmic-ray soil moisture, land surface temperature and leaf area index in CLM4.5

    Science.gov (United States)

    Han, Xujun; Hendricks Franssen, Harrie-Jan; Schalge, Bernd; Baroni, Gabriele; Rihani, Jehan; Kollet, Stefan; Vereecken, Harry; Simmer, Clemens

    2017-04-01

    The land surface plays a central role in the atmosphere - land surface - subsurface continuum. Surface soil moisture for instance impacts the partitioning of absorbed radiation in heating ground and atmosphere and thus impacts resulting evapotranspiration. The land surface also drives partitioning of rainfall between infiltration which ends up as groundwater recharge and surface runoff contributing to stream discharge. It is therefore expected that the use of observations for characterizing and predicting the land surface state also leads to improved state estimations and predictions in all the other sub-compartments of the system we consider: groundwater, stream discharge and atmosphere. To test this hypothesis requires efficient data assimilation schemes that are capable to take up specific requirements of different compartments, such as different time windows of observations. In this study we will derive such data assimilation methods and quantify the improvement of predictions in the different compartments due to assimilation of multiple observations, and evaluate to what extent assimilation of land surface observations will also improve predictions of land surface states and fluxes for atmosphere and groundwater. We argue that improvements can be achieved by implementing a data assimilation methodology that is capable of simultaneous assimilation of many data sources (remote sensing soil moisture, cosmic-ray measurement for soil moisture, land surface temperature and leaf area index) at different spatial scales ranging from 102 m to 104 m. The multivariate data assimilation system for the land-surface component will be developed and extended to assimilate the coarse scale remote sensing soil moisture, cosmic-ray soil moisture, land surface temperature and leaf area index, and their different combinations using the local ensemble transform Kalman filter. The multivariate data assimilation will be evaluated using a synthetic study which mimics the Neckar

  18. CaRe high - Cascade screening and registry for high cholesterol in Germany.

    Science.gov (United States)

    Schmidt, Nina; Grammer, Tanja; Gouni-Berthold, Ioanna; Julius, Ulrich; Kassner, Ursula; Klose, Gerald; König, Christel; Laufs, Ulrich; Otte, Britta; Steinhagen-Thiessen, Elisabeth; Wanner, Christoph; März, Winfried

    2017-11-01

    Familial hypercholesterolemia (FH) is an inherited disorder of the LDL metabolism, leading to cardiovascular disease, even at young age. This risk can be significantly lowered by early diagnosis and treatment. About 270,000 patients affected in Germany are not diagnosed correctly and only a small number is treated properly. To improve FH diagnosis in the general population a cascade screening and registry data is warranted, yet missing in Germany. This project aims to fill this gap. Study assistants approach physicians and lipid clinics to introduce the cascade screening and registry. The physicians identify potential FH patients and include them in the study. Patient data is acquired via questionnaires about medical history. Patients meeting at least two inclusion criteria (LDL-C >190 mg/dl or total cholesterol >290 mg/dl; tendon xanthomas; family history of hypercholesterolemia or early myocardial infarction) are included in the registry. Family members will be contacted and physicians get feedback about diagnosis and treatment options. Ethical approvals for all German states have been collected. So far physicians, lipid clinics and patients within the Rhein-Neckar region, the Saarland, North-Rhine-Westphalia, Upper Bavaria, Bremen, Saxonia and Berlin have joined the study. We expect to include more than 3000 patients during the next two years. After initial patient and data collection the project aims to improve FH-diagnosis and treatment. Utilizing registry data might advance diagnostic criteria and improve detection of FH and thus prevent CVD in this population. Copyright © 2017. Published by Elsevier B.V.

  19. Factors governing sediment quality (PAH) in rivers

    Science.gov (United States)

    Schwientek, Marc; Rügner, Hermann; Scherer, Ulrike; Rode, Michael; Grathwohl, Peter

    2017-04-01

    The contamination of riverine sediments and suspended matter with hydrophobic pollutants is typically associated with urban land use. It is, however, rarely related to the sediment supply of the watershed. We show for a suite of catchments in two regions of Germany with contrasting land use and geology, that the contamination of suspended particles with polycyclic aromatic hydrocarbons (PAH) may be predicted based on the ratio of inhabitants residing within the catchment and the catchment's sediment yield. The applicability of this concept is demonstrated for catchments ranging in size from 100 to >3000 km2. This implies that the loading of particles with PAH is more or less time invariant which is also indicated by long term measurements from sub catchments of the upper Neckar River in Southwest Germany. Data on sediment yields are rare and the installation of appropriate measurement stations is expensive, the establishment of data series time-consuming. Therefore, modeling of sediment yields based on the universal soil loss equation is proposed. Although this method lacks a physical basis, it is feasible at larger scales and is shown to lead to reasonable results at low costs. The importance of catchment properties in terms of sediment supply and the implications of the presented concept for water resources management are discussed. For instance, it may easily be used to estimate the vulnerability of river systems to particle-associated urban pollutants with similar input pathways as the PAH or to indicate if contaminant point sources such as sites of legacy pollution exist in a river catchment.

  20. Insights in time dependent cross compartment sensitivities from ensemble simulations with the fully coupled subsurface-land surface-atmosphere model TerrSysMP

    Science.gov (United States)

    Schalge, Bernd; Rihani, Jehan; Haese, Barbara; Baroni, Gabriele; Erdal, Daniel; Haefliger, Vincent; Lange, Natascha; Neuweiler, Insa; Hendricks-Franssen, Harrie-Jan; Geppert, Gernot; Ament, Felix; Kollet, Stefan; Cirpka, Olaf; Saavedra, Pablo; Han, Xujun; Attinger, Sabine; Kunstmann, Harald; Vereecken, Harry; Simmer, Clemens

    2017-04-01

    Currently, an integrated approach to simulating the earth system is evolving where several compartment models are coupled to achieve the best possible physically consistent representation. We used the model TerrSysMP, which fully couples subsurface, land surface and atmosphere, in a synthetic study that mimicked the Neckar catchment in Southern Germany. A virtual reality run at a high resolution of 400m for the land surface and subsurface and 1.1km for the atmosphere was made. Ensemble runs at a lower resolution (800m for the land surface and subsurface) were also made. The ensemble was generated by varying soil and vegetation parameters and lateral atmospheric forcing among the different ensemble members in a systematic way. It was found that the ensemble runs deviated for some variables and some time periods largely from the virtual reality reference run (the reference run was not covered by the ensemble), which could be related to the different model resolutions. This was for example the case for river discharge in the summer. We also analyzed the spread of model states as function of time and found clear relations between the spread and the time of the year and weather conditions. For example, the ensemble spread of latent heat flux related to uncertain soil parameters was larger under dry soil conditions than under wet soil conditions. Another example is that the ensemble spread of atmospheric states was more influenced by uncertain soil and vegetation parameters under conditions of low air pressure gradients (in summer) than under conditions with larger air pressure gradients in winter. The analysis of the ensemble of fully coupled model simulations provided valuable insights in the dynamics of land-atmosphere feedbacks which we will further highlight in the presentation.

  1. A virtual reality catchment for data assimilation experiments

    Science.gov (United States)

    Schalge, Bernd; Rihani, Jehan; Haese, Barbara; Baroni, Gabriele; Erdal, Daniel; Neuweiler, Insa; Hendricks-Franssen, Harrie-Jan; Geppert, Gernot; Ament, Felix; Kollet, Stefan; Cirpka, Olaf; Saavedra, Pablo; Han, Xujun; Attinger, Sabine; Kunstmann, Harald; Vereecken, Harry; Simmer, Clemens

    2016-04-01

    Current data assimilation (DA) systems often lack the possibility to assimilate measurements across compartments to accurately estimate states and fluxes in subsurface-land surface-atmosphere systems (SLAS). In order to develop a new DA framework that is able to realize this cross-compartmental assimilation a comprehensive testing environment is needed. Therefore a virtual reality (VR) catchment is constructed with the Terrestrial System Modeling Platform (TerrSysMP). This catchment mimics the Neckar catchment in Germany. TerrSysMP employs the atmospheric model COSMO, the land surface model CLM and the hydrological model ParFlow coupled with the external coupler OASIS. We will show statistical tests to prove the plausibility of the VR. The VR is running in a fully-coupled mode (subsurface - land surface - atmosphere) which includes the interactions of subsurface dynamics with the atmosphere, such as the effects of soil moisture, which can influence near-surface temperatures, convection patterns or the surface heat fluxes. A reference high resolution run serves as the "truth" from which virtual observations are extracted with observation operators like virtual rain gauges, synoptic stations and satellite observations (amongst others). This effectively solves the otherwise often encountered data scarcity issues with respect to DA. Furthermore an ensemble of model runs at a reduced resolution is performed. This ensemble serves also for open loop runs to be compared with data assimilation experiments. The model runs with this ensemble served to identify sets of parameters that are especially sensitive to changes and have the largest impact on the system. These parameters were the focus of subsequent ensemble simulations and DA experiments. We will show to what extend the VR states can be re-constructed using data assimilation methods with only a limited number of virtual observations available.

  2. [Refuge in Digital Worlds - the Association of Critical Life Events with Pathological Internet Use in Adolescence].

    Science.gov (United States)

    Koenig, Julian; Fischer-Waldschmidt, Gloria; Brunner, Romuald; Resch, Franz; Kaess, Michael

    2016-09-01

    Refuge in Digital Worlds - the Association of Critical Life Events with Pathological Internet Use in Adolescence The present study sought to clarify the potential relationship between critical life events and pathological internet use in adolescents. A cross-sectional survey was conducted within the framework of a European school-based study (SEYLE) which included a representative sample of 1,444 students from the Rhein-Neckar catchment area. The Young Diagnostic Questionnaire (YDQ) was used to assess pathological internet use, whereas a combination of the List of Threatening Experiences (LTE) and Life Events Checklist (LCE) was administered to assess critical life events over the period of the last six months. Statistical models were adjusted for the presence of psychopathological distress using the Strengths and Difficulties Questionnaire (SDQ). 4.8 % of the participating students reported pathological internet use, 14.5 % met criteria for risky Internet use. Overall, adolescents with risky or pathological internet use recalled more critical life events, particularly within the context of interpersonal relationships and academic performance. After adjusting for sociodemographic variables and psychopathological distress, results showed that an unexpected decrease in academic performance as well as the termination of a romantic relationship, both were significantly associated with pathological internet use. Adolescents with pathological internet use reported significantly more frequent interpersonal problems and an unexpected decrease of academic performance. Based on the cross-sectional nature of the investigation, causality of the association cannot be established. However, results point towards potential risk factors (academic performance, termination of relationships) which may guide the identification of adolescents with risky or pathological internet use in child- and adolescent psychiatry.

  3. [Microbiological studies of the significance of natural and simulated water transmission in the evaluation of UV plants for water disinfection].

    Science.gov (United States)

    Leuker, G; Hingst, V

    1990-10-01

    The efficiency of UV-irradiation for water disinfection was tested using an UV-plant with constant flow between 0.7 and 11.5 m3/h. Within the range of water transmission (254 nm) between 40% and 98% (1 cm), which naturally was found in tap water, water from the Neckar river and biologically treated sewage water in an amount of 96%, 78% and ca. 60%, simulation was performed by artificial addition of fluorescein to demineralized water. Data obtained show similar results for the reduction of E. faecium and C. albicans, which were used as test strains. The investigation show no major discrepancies in the range of transmission from 80-96%, which is relevant for tap water disinfection. Water transmission at 254 nm was confirmed as important factor for UV-irradiation. Also found suitable was fluorescein for simulation of the natural water transmission without affecting the test strains. Thus UV-sensitivity of test strains could be detected by combination of flow rate and simulated water transmission using fluorescein. P. aeruginosa and E. coli were found to be more UV-sensitive than S. enteritidis and S. marcescens. UV-resistance increased on the scale from E. faecium, S. aureus, M. luteus up to C. albicans. The efficiency of an UV-plant can be experimentally defined by a specific combination of flow rate (up to a certain amount) and water transmission. Thus the question can be answered whether and UV-plant is able to fulfill the specific requirements in use. These results, regarding the artificial variation of transmission values, are to be considered important for the specification of an additional measure of safety for minimal irradiation exposure times.

  4. Factor Structure, Reliability and Measurement Invariance of the Alberta Context Tool and the Conceptual Research Utilization Scale, for German Residential Long Term Care

    Science.gov (United States)

    Hoben, Matthias; Estabrooks, Carole A.; Squires, Janet E.; Behrens, Johann

    2016-01-01

    We translated the Canadian residential long term care versions of the Alberta Context Tool (ACT) and the Conceptual Research Utilization (CRU) Scale into German, to study the association between organizational context factors and research utilization in German nursing homes. The rigorous translation process was based on best practice guidelines for tool translation, and we previously published methods and results of this process in two papers. Both instruments are self-report questionnaires used with care providers working in nursing homes. The aim of this study was to assess the factor structure, reliability, and measurement invariance (MI) between care provider groups responding to these instruments. In a stratified random sample of 38 nursing homes in one German region (Metropolregion Rhein-Neckar), we collected questionnaires from 273 care aides, 196 regulated nurses, 152 allied health providers, 6 quality improvement specialists, 129 clinical leaders, and 65 nursing students. The factor structure was assessed using confirmatory factor models. The first model included all 10 ACT concepts. We also decided a priori to run two separate models for the scale-based and the count-based ACT concepts as suggested by the instrument developers. The fourth model included the five CRU Scale items. Reliability scores were calculated based on the parameters of the best-fitting factor models. Multiple-group confirmatory factor models were used to assess MI between provider groups. Rather than the hypothesized ten-factor structure of the ACT, confirmatory factor models suggested 13 factors. The one-factor solution of the CRU Scale was confirmed. The reliability was acceptable (>0.7 in the entire sample and in all provider groups) for 10 of 13 ACT concepts, and high (0.90–0.96) for the CRU Scale. We could demonstrate partial strong MI for both ACT models and partial strict MI for the CRU Scale. Our results suggest that the scores of the German ACT and the CRU Scale for nursing

  5. Searching for the right scale in catchment hydrology: the effect of soil spatial variability in simulated states and fluxes

    Science.gov (United States)

    Baroni, Gabriele; Zink, Matthias; Kumar, Rohini; Samaniego, Luis; Attinger, Sabine

    2017-04-01

    The advances in computer science and the availability of new detailed data-sets have led to a growing number of distributed hydrological models applied to finer and finer grid resolutions for larger and larger catchment areas. It was argued, however, that this trend does not necessarily guarantee better understanding of the hydrological processes or it is even not necessary for specific modelling applications. In the present study, this topic is further discussed in relation to the soil spatial heterogeneity and its effect on simulated hydrological state and fluxes. To this end, three methods are developed and used for the characterization of the soil heterogeneity at different spatial scales. The methods are applied at the soil map of the upper Neckar catchment (Germany), as example. The different soil realizations are assessed regarding their impact on simulated state and fluxes using the distributed hydrological model mHM. The results are analysed by aggregating the model outputs at different spatial scales based on the Representative Elementary Scale concept (RES) proposed by Refsgaard et al. (2016). The analysis is further extended in the present study by aggregating the model output also at different temporal scales. The results show that small scale soil variabilities are not relevant when the integrated hydrological responses are considered e.g., simulated streamflow or average soil moisture over sub-catchments. On the contrary, these small scale soil variabilities strongly affect locally simulated states and fluxes i.e., soil moisture and evapotranspiration simulated at the grid resolution. A clear trade-off is also detected by aggregating the model output by spatial and temporal scales. Despite the scale at which the soil variabilities are (or are not) relevant is not universal, the RES concept provides a simple and effective framework to quantify the predictive capability of distributed models and to identify the need for further model improvements e

  6. Strengthening Interprofessional Requirements Engineering Through Action Sheets: A Pilot Study.

    Science.gov (United States)

    Kunz, Aline; Pohlmann, Sabrina; Heinze, Oliver; Brandner, Antje; Reiß, Christina; Kamradt, Martina; Szecsenyi, Joachim; Ose, Dominik

    2016-10-18

    Rhine-Neckar region. In order to improve the interprofessional cooperation the idea arose to align the requirements arising from the implementation project with the method of software development applied by the technical development team. This was realized by restructuring the original requirements set in a standardized way and under continuous adjustment between both teams. As a result not only the way of displaying the user demands but also of interprofessional cooperation was steered in a new direction. User demands must be taken into account from the very beginning of the development process, but it is not always obvious how to bring them together with IT knowhow and knowledge of the contextual factors of the health care system. Action Sheets seem to be an effective tool for making the software development process more tangible and convertible for all connected disciplines. Furthermore, the working method turned out to support interprofessional ideas exchange.

  7. Factor Structure, Reliability and Measurement Invariance of the Alberta Context Tool and the Conceptual Research Utilization Scale, for German Residential Long Term Care.

    Science.gov (United States)

    Hoben, Matthias; Estabrooks, Carole A; Squires, Janet E; Behrens, Johann

    2016-01-01

    We translated the Canadian residential long term care versions of the Alberta Context Tool (ACT) and the Conceptual Research Utilization (CRU) Scale into German, to study the association between organizational context factors and research utilization in German nursing homes. The rigorous translation process was based on best practice guidelines for tool translation, and we previously published methods and results of this process in two papers. Both instruments are self-report questionnaires used with care providers working in nursing homes. The aim of this study was to assess the factor structure, reliability, and measurement invariance (MI) between care provider groups responding to these instruments. In a stratified random sample of 38 nursing homes in one German region (Metropolregion Rhein-Neckar), we collected questionnaires from 273 care aides, 196 regulated nurses, 152 allied health providers, 6 quality improvement specialists, 129 clinical leaders, and 65 nursing students. The factor structure was assessed using confirmatory factor models. The first model included all 10 ACT concepts. We also decided a priori to run two separate models for the scale-based and the count-based ACT concepts as suggested by the instrument developers. The fourth model included the five CRU Scale items. Reliability scores were calculated based on the parameters of the best-fitting factor models. Multiple-group confirmatory factor models were used to assess MI between provider groups. Rather than the hypothesized ten-factor structure of the ACT, confirmatory factor models suggested 13 factors. The one-factor solution of the CRU Scale was confirmed. The reliability was acceptable (>0.7 in the entire sample and in all provider groups) for 10 of 13 ACT concepts, and high (0.90-0.96) for the CRU Scale. We could demonstrate partial strong MI for both ACT models and partial strict MI for the CRU Scale. Our results suggest that the scores of the German ACT and the CRU Scale for nursing

  8. Statistical simulation of ensembles of precipitation fields for data assimilation applications

    Science.gov (United States)

    Haese, Barbara; Hörning, Sebastian; Chwala, Christian; Bárdossy, András; Schalge, Bernd; Kunstmann, Harald

    2017-04-01

    The simulation of the hydrological cycle by models is an indispensable tool for a variety of environmental challenges such as climate prediction, water resources management, or flood forecasting. One of the crucial variables within the hydrological system, and accordingly one of the main drivers for terrestrial hydrological processes, is precipitation. A correct reproduction of the spatio-temporal distribution of precipitation is crucial for the quality and performance of hydrological applications. In our approach we stochastically generate precipitation fields conditioned on various precipitation observations. Rain gauges provide high-quality information for a specific measurement point, but their spatial representativeness is often rare. Microwave links, e. g. from commercial cellular operators, on the other hand can be used to estimate line integrals of near-surface rainfall information. They provide a very dense observational system compared to rain gauges. A further prevalent source of precipitation information are weather radars, which provide rainfall pattern informations. In our approach we derive precipitation fields, which are conditioned on combinations of these different observation types. As method to generate precipitation fields we use the random mixing method. Following this method a precipitation field is received as a linear combination of unconditional spatial random fields, where the spatial dependence structure is described by copulas. The weights of the linear combination are chosen in the way that the observations and the spatial structure of precipitation are reproduced. One main advantage of the random mixing method is the opportunity to consider linear and non-linear constraints. For a demonstration of the method we use virtual observations generated from a virtual reality of the Neckar catchment. These virtual observations mimic advantages and disadvantages of real observations. This virtual data set allows us to evaluate simulated

  9. SMAP/SMOS Soil moisture brightness temperature virtual observations to study data assimilation scheme

    Science.gov (United States)

    Saavedra, P.; Simmer, C.

    2015-12-01

    A multidisciplinary research unit has been established in order to develop a data assimilation framework for coupled subsurface-land surface-atmosphere systems (SLASs), i.e. the coupled suit of models TerrSysMP comprised by ParFlow (subsurface), Community Land Model (CLM, surface), and COSMO (atmosphere). It aims to test how different kinds of observations may improve system state estimations with a focus on inter-compartmental fluxes of matter and heat energy. To that goal a simulated virtual reality (VR) catchment is being generated as a tool to test data assimilation schemes for SLAS. The virtual reality overcomes the problem of data scarcity for the different components as subsurface, soil and atmosphere in the real world and provides the full system state as a basis for the evaluation of the effectiveness of data assimilation strategies. The first version of the VR uses TerrSysMP - reduced to COSMO and CLM - to generate virtual observations such as satellite measurements, radar observations and meteorological station data. Currently VR simulations are available for a region encompassing the Neckar catchment located in south-west Germany with 1.1km horizontal resolution for the time period from 2007 to 2013. This contribution focuses on the evaluation of satellite observations of the microwave emission at L-band as observed by the current satellite missions SMAP and SMOS. By adjusting the Community Microwave Emission Model (CMEM) as a forward operator for the VR framework, a first set of virtual passive microwave observations is generated. SMAP and SMOS observations are simulated taking into account orbit characteristics, revisit times, and angular viewing geometries. The virtual observations will be statistically compared with available real observations to evaluate the degree of reality in terms of mean values and dynamic ranges. These comparisons will hint to systematic differences between TerrSysMP and reality, which need to be addressed by appropriate bias

  10. Monitoring of lateral hyporheic exchange fluxes and hyporheic travel times at the newly established Steinlach Test Site, Germany

    Science.gov (United States)

    Osenbrück, K.; Lemke, D.; Schwientek, M.; Callisto Alvarez, M. C.; Wöhling, Th.; Cirpka, O. A.

    2012-04-01

    Hyporheic exchange is believed to significantly contribute to the retention and degradation of pollutants during downstream transport in surface waters. A better understanding of the relevant hydraulic drivers of stream water infiltration into the hyporheic zone in conjunction with the associated biogeochemical processes is needed in order to quantify the self-cleaning potential of rivers and to predict water quality changes. Key parameters include the spatial and temporal variation of stream water infiltration (i.e. hyporheic exchange) and the distribution of hyporheic travel times. In this study we present the setup, performance and first results of a multi-disciplinary hyporheic monitoring program at the newly established Steinlach Test Site (STS) near Tübingen in Southern Germany. The STS covers an area of about 0.6 ha and consists of a river loop located within a sub-catchment of the Neckar river. The main objective is the quantification and interrelation of hyporheic processes including hyporheic exchange, travel-time distributions, microbial community dynamics and biochemical pollutant turnover at the groundwater-surface water interface. Here we will focus on the extent and time scale of hyporheic exchange fluxes at the STS derived from time series of temperature (T), specific electrical conductivity (EC), and δ18O of water. The STS is equipped with more than 30 piezometers, most of them containing automatic water level, T and EC probes. Additional water samples for major ions, stable isotopes and other water quality parameters were taken in the course of flood events in summer 2011. The sand and gravel aquifer in the subsurface of the STS is characterised by a complex geometry with heterogeneous hydraulic conductivity. Low residence times in the southern part are confirmed by a small to negligible response in EC and T at the respective piezometers compared to the large variation of EC in the stream water. Using deconvolution techniques, a mean travel time

  11. Mofettes - Investigation of Natural CO2 Springs - Insights and Methods applied

    Science.gov (United States)

    Lübben, A.; Leven, C.

    2014-12-01

    The quantification of carbon dioxide concentrations and fluxes leaking from the subsurface into the atmosphere is highly relevant in several research fields such as climate change, CCS, volcanic activity, or earthquake monitoring. Many of the areas with elevated carbon dioxide degassing pose the problem that under the given situation a systematic investigation of the relevant processes is only possible to a limited extent (e.g. in terms of spatial extent, accessibility, hazardous conditions). The upper Neckar valley in Southwest Germany is a region of enhanced natural subsurface CO2 concentrations and mass fluxes of Tertiary volcanic origin. At the beginning of the twentieth century several companies started industrial mining of CO2. The decreasing productivity of the CO2 springs led to the complete shutdown of the industry in 1995 and the existing boreholes were sealed. However, there are evidences that the reservoir, located in the deposits of the Lower Triassic, started to refill during the last 20 years. The CO2 springs replenished and a variety of different phenomena (e.g. mofettes and perished flora and fauna) indicate the active process of large scale CO2 exhalation. This easy-to-access site serves as a perfect example for a natural analog to a leaky CCS site, including abandoned boreholes and a suitable porous rock reservoir in the subsurface. During extensive field campaigns we applied several monitoring techniques like measurements of soil gas concentrations, mass fluxes, electrical resistivity, as well as soil and atmospheric parameters. The aim was to investigate and quantify mass fluxes and the effect of variations in e.g. temperature, soil moisture on the mass flux intensity. Furthermore, we investigated the effect of the vicinity to a mofette on soil parameters like electrical conductivity and soil CO2 concentrations. In times of a changing climate due to greenhouse gases, regions featuring natural CO2 springs demand to be intensively investigated

  12. Integration of Remote Sensing Data In Operational Flood Forecast In Southwest Germany

    Science.gov (United States)

    Bach, H.; Appel, F.; Schulz, W.; Merkel, U.; Ludwig, R.; Mauser, W.

    Methods to accurately assess and forecast flood discharge are mandatory to minimise the impact of hydrological hazards. However, existing rainfall-runoff models rarely accurately consider the spatial characteristics of the watershed, which is essential for a suitable and physics-based description of processes relevant for runoff formation. Spatial information with low temporal variability like elevation, slopes and land use can be mapped or extracted from remote sensing data. However, land surface param- eters of high temporal variability, like soil moisture and snow properties are hardly available and used in operational forecasts. Remote sensing methods can improve flood forecast by providing information on the actual water retention capacities in the watershed and facilitate the regionalisation of hydrological models. To prove and demonstrate this, the project 'InFerno' (Integration of remote sensing data in opera- tional water balance and flood forecast modelling) has been set up, funded by DLR (50EE0053). Within InFerno remote sensing data (optical and microwave) are thor- oughly processed to deliver spatially distributed parameters of snow properties and soil moisture. Especially during the onset of a flood this information is essential to estimate the initial conditions of the model. At the flood forecast centres of 'Baden- Württemberg' and 'Rheinland-Pfalz' (Southwest Germany) the remote sensing based maps on soil moisture and snow properties will be integrated in the continuously op- erated water balance and flood forecast model LARSIM. The concept is to transfer the developed methodology from the Neckar to the Mosel basin. The major challenges lie on the one hand in the implementation of algorithms developed for a multisensoral synergy and the creation of robust, operationally applicable remote sensing products. On the other hand, the operational flood forecast must be adapted to make full use of the new data sources. In the operational phase of the

  13. First dating of groundwater with Atom Trap Trace Analysis of 39Ar - application

    Science.gov (United States)

    Reichel, Thomas; Kersting, Arne; Ritterbusch, Florian; Ebser, Sven; Bender, Klaus; Purtschert, Roland; Oberthaler, Markus; Aeschbach-Hertig, Werner

    2013-04-01

    Groundwater from the intermediate aquifer layers of the Rhine Graben sediments in the Rhein-Neckar metropolitan region is strongly exploited for the purpose of drinking water supply. Isotope hydrological investigations of the regional groundwater dynamics have been initiated with the ultimate goal of improving the protection of this important water resource. However, these studies are hampered by the fact that the groundwater falls in the age dating gap of classical isotope methods between about 50 and 1000 years of water age, which can only be bridged by the extremely rare isotope 39Ar. Here we report and discuss the first 39Ar groundwater ages obtained by the new analytical method Atom Trap Trace Analysis (ATTA). Groundwater samples from the Upper Rhine Graben aquifers were collected and analysed by established methods for a large range of tracers, including tritium, stable isotopes, noble gases, and 14C. For 39Ar analysis, several tons of water were degassed in the field using a membrane contactor. In the laboratory, a gas-chromatographic system at cryogenic temperatures was used to separate pure argon from the extracted gas. ATTA was then used to isolate and count 39Ar atoms from these samples. In parallel, samples for 39Ar analysis by low-level counting at the University of Bern were taken to enable comparison of the two analytical techniques. The resulting 39Ar groundwater ages in the range of several hundred years are in accordance with the indications obtained from the classical dating tracers. They provide quantitative information on the groundwater travel time for an important, strongly exploited part of the investigated aquifer system, which could not be obtained from the other tracers. These results significantly improve the knowledge of the time scale of groundwater renewal in the aquifer layers of intermediate depth. Furthermore, the combination of the 39Ar age scale with noble gas recharge temperatures and stable isotope data has the potential to

  14. The Meteoritical Quincentennial: The Stone of Ensisheim 1492-1992

    Science.gov (United States)

    Marvin, U. B.

    1992-07-01

    This year marks the 500th anniversary of the fall of a meteorite at Ensisheim in Alsace. In at least two respects this event is unique in the history of meteoritics. First, this was the earliest witnessed meteorite fall in the West from which pieces are preserved. Second, it is the only meteorite of which a continuous five-century public record exists in manuscripts and books. Beginning with newsheets printed in 1492, writings about this event illuminate the evolution of ideas from a 15th century belief that stones from the sky were of miraculous origin, to an 18th century conviction that stones do not fall from the sky, to our present view that they fall in abundance, originating in interplanetary space (Marvin, 1992). This paper will highlight certain previously unexamined aspects of the story and address problems inherent in historical analysis. Unusable Maps. The fall of the stone was heralded by an explosion which, according to Sebastian Brant (1492), was heard along the valleys of the Danube, Neckar, Aare, Ill, and Rhine and in the alpine cantons of Schwyz and Uri. Contemporary maps, such as that published in The Nuremberg Chronicle of 1493, so distorted the regional geography that a fireball trajectory cannot be reconstructed on them. On modern maps, however, the areas Brant listed stretch about 150 km to the southeast of Ensisheim, a distance well within the range of sounds reported from other exploding fireballs. Newton (1891) and Marvin (1992) worked out possible trajectories that could account for the sound being heard in all named localities. This suggests that, far from exaggerating distances for dramatic effect, Brant's description may well have been accurate. If so, he compiled his information from word-of-mouth reports without reference to the rudimentary maps available in his time. The Language of Wonder. A document mounted beside the stone in the Ensisheim church stated that learned men did not know what it was: it must be supernatural, a wonder

  15. Sense or no-sense of the sum parameter for water soluble "adsorbable organic halogens" (AOX) and "absorbed organic halogens" (AOX-S18) for the assessment of organohalogens in sludges and sediments.

    Science.gov (United States)

    Müller, German

    2003-07-01

    mineralogenic components derived from the erosion of fine grained sediments or soils. Assuming 50% geogenic particles with a mean Cl concentration of 103 mg/kg (as in shales and clays) the mineralogenic Cl-content could add about 50 mg/kg to the organic AOX in sewage sludge. The occurrence of insoluble and non-adsorbable PVC in sewage sludge exhibits the same problems as the mineralogenic constituents: a detection as AOX-S18 is possible when the final high temperature analytical step is applied. Plants as major sources of organohalogens have never been doubted. Only recently [Science 295 (2002) 985] based on the determination of the form of Cl with near-edge X-ray adsorption fine structure (NEXAFS) spectroscopy and extended X-ray adsorption showed the variations in the inorganic Cl(-) and organo-Cl compounds with increasing humification of plant leaves from "fresh leaves--senescent leaves on plants--senescent leaves on soil--powdered top soil--isolated soil humus". His finding of exclusively inorganic Cl(-) in the starting material (fresh leaves) is controverse to our earlier results indicating the presence of ionic inorganic Cl together with water insoluble absorbed organohalogens (AOX-S18) in eight different macrophytes of both terrestrial and marine environments. Our research on AOX in interstitial water of anaerobic limnic sediments has led to the role of bromine playing in the diagenesis of the organic matter of sediments. In sediments of Lake Constance Br(-) concentrations in lake water at the sediment water interface increased from water at 77 cm sediment depth. In the Neckar River a Br concentrations of 0.02 mg/l at the water/sediment interface increasing to 0.74 mg/l in pore water in 85 cm depth was found. Here a parallel development could be found with ammonium concentration and alkalinity. The very high positive correlation ammonium:bromide and bromide:alkalinity leads to the conclusion, that bromine, originally a high molecular constituent of the organic matter, is