Axel Bergmann

RWW Rheinisch-Westfälische Wasserwerksgesellschaft mbH · Business Development

The fraction of precipitation that infiltrates soils and subsequently becomes recharge is one of the principle components of an unconfined aquifer's water budget (this fraction is here termed recharge efficiency). Here we tested how recharge efficiency will respond to climate change including a possible plant physiological response to climate chang...

Der Anteil des Niederschlags, der in den Boden infiltriert und anschließend in die Grundwasserneubildung übergeht, ist eine der wichtigsten Komponenten des Wasserhaushalts eines ungespannten Grundwasserleiters. Im Zuge des fortschreitenden Klimawandels sind vielfältige Veränderungen der Bodenwasserflüsse zu erwarten, zum Teil, weil die Vegetation d...

Die 3. Mülheimer Tagung dürfte für viel Gesprächsstoff gesorgt haben. Selten wurden Erwartungen und Bedarfe der Wasserkunden von allen Seiten so eingehend beleuchtet

Due to growing concern about organic micropollutants and their transformation products (TP) in surface and drinking water, reliable identification of unknowns is required. Here, we demonstrate how non-target liquid chromatography (LC)-high-resolution tandem mass spectrometry (MS/MS) and the feature-based molecular networking (FBMN) workflow provide...

Targeting the most relevant organic micropollutants (OMP) in routine analysis appears difficult due to formation of transformation products of unknown concentration or toxicity. Performance assessment of water purification processes is still based upon limited target data. Therefore, we broadened the assessment of the removal efficiencies with comb...

Riverbank filtration (RBF) is a reliable water purification technique that has proven to be suitable for the removal of organic micropollutants. Its removal efficiency and dependency on a variety of factors such as redox conditions, temperatures, geology, travel times, level of initial micropollutant concentrations and seasonality were investigated...

In Deutschland ist die häufigste Ursache für die Belastung des Grundwassers der Eintrag von Nitrat. Auch im Wassergewinnungsgebiet Holsterhausen/Üfter Mark werden im Grundwasser seit Jahren hohe Nitratkonzentrationen gemessen, die zum Teil weit über dem Grenzwert der Trinkwasserverordnung liegen. Die Rohmischwässer der beiden Brunnengalerien Holste...

Zusammenfassung In vielen Wassergewinnungsgebieten gewährleisten Abbauprozesse im Grundwasserleiter die Minderung der Nitratbelastung und ermöglichen so die Entnahme nitratarmer Rohwässer. Das Nitratabbauvermögen der Grundwasserleiter ist überwiegend an organische Kohlenstoffverbindungen und Eisendisulfide gebunden, die als endliche Ressourcen daue...

In der Studie werden die Kosten analysiert, die für die Trinkwasserbereitstellung aufgrund von Nährstoff- und Pflanzenschutzmittel-Einträgen aus der Landwirtschaft in das Grundwasser entstehen. Dazu wurden Primärdaten aus fünf verschiedenen Modellregionen erhoben und mit einer deutschlandweiten Umfrage von Wasserversorgern ergänzt. Auf dieser Grund...

Die vorliegende Studie analysiert die landwirtschaftlich verursachten Kosten, die Wasserversorgern im Rahmen der Trinkwasserbereitstellung entstehen und legt dabei einen besonderen Fokus auf die Nitratproblematik. Auf Basis einer Primärdatenerhebung in fünf Modellregionen von drei verschiedenen Kooperationspartnern (OOWV; Regionen: Südoldenburg und...

Zusammenfassung Mikrobiologische Abbauprozesse tragen maßgeblich zur Minderung der Nitratbelastung in sedimentären Grundwasserleitern bei, indem Nitrat unter Verbrauch von organischem Kohlenstoff (heterotroph) und Eisensulfiden bspw. Pyrit (autotroph) reduziert wird. Allerdings sind diese Phasen in Sedimenten oft nur in Spuren vorhanden und werden...

Pharmaceuticals are known to occur widely in the environment of industrialized countries. In developing countries, more monitoring results have recently become available, but a concise picture on the prevailing concentrations is still elusive. In a comprehensive literature review of 1016 original publications and 150 review articles, we compiled me...

Besides obvious benefits, the Three Gorges Dam's construction resulted in new pollution scenarios with the potentials to threaten the Three Gorges Reservoir (TGR) ecosystem. In order to record organic contamination, to find links to ecotoxicological impacts and to serve as reference for ensuing monitoring, several sites in the TGR area were screene...

The application of hydraulic fracturing during exploration and exploitation of unconventional natural gas reservoirs is currently under intense public discussion. On behalf of the German Federal Environment Agency we have investigated the potential water-related environmental risks for human health and the environment that could be caused by employ...

The impoundment of the Three Gorges Reservoir (TGR) in China is widely blamed and investigated for its impact on the ecosystem and water quality [1-3]. Water quality in the Yangtze river and its tributaries is therefore of major concern, as in the catchment area of the TGR surface water is commonly used as the raw water source for public water supp...

DVGW energie wasser praxis 2/2014

This study deals with the evaluation of water quality of the Three Gorges Reservoir (TGR) in order to assess its suitability as a raw water source for drinking water production. Therefore, water samples from (1) surface water, (2) tap water, and (3) wastewater treatment plant effluents were taken randomly by 2011-2012 in the area of the TGR and wer...

Introduction. The newly built Three Gorges Dam (TGD) impounds the 6,300 km long Yangtze river for the world’s largest project for hydroelectric power generation in terms of installed capacity (18.2 million kW) [1]. There are additional benefits, such as flood control, enhanced navigability, provision of irrigation water, or stimulation of tourism....

The quarternary sediments of the Hessian Ried, a part of the Rhine valley, hold an important groundwater resource for the densely populated Rhine-Main region in germany. Studies related to the implementation of the EU Water Framework Directive (WFD) have shown high nitrate concentrations in the groundwater, especially in the upper parts of the aqui...

To provide the public with high quality drinking water is a technological challenge, particularly in emerging countries. In the catchment area of the Three Gorges Reservoir (TGR, China) productive and protected groundwater resources are very rare. Surface water is often used as a raw water source, but bank filtration as a first purification step is...

http://www.umweltbundesamt.de/uba-info-medien/4346.html

http://www.umweltbundesamt.de/wasser/themen/grundwasser/fracking.htm

Knowledge of the amount of bank filtrate in raw water is crucial for drinking water suppliers using water wells in close proximity to rivers, in particular if those rivers are strongly affected by anthropogenic activities, e. g. receiving effluents from waste water treatment plants. Analysis of organic micropollutants as tracer compounds is costly...

Water of good quality is one of the basic needs of human life. Worldwide, great efforts are being undertaken for an assured water supply. In this respect, one of the largest water technology projects worldwide is the Yangtze Three Gorges Dam in China. There is a need for extensive scientific and technical understanding of the challenges arising fro...

This chapter deals with different treatment options for the removal or degradation of polyfluorinated chemicals (PFC). Adsorption on activated carbon and membrane filtration (nanofiltration and reverse osmosis) belongs to the state-of-the-art methods and effective separate resp. reject fluorinated compounds. Biological degradation and conventional...

In einer umfassenden Literaturrecherche wurde eine aktuelle Bestandsaufnahme der in Deutschland und im europäischen Ausland vorliegenden Monitoringdaten zum Vorkommen und Verhalten von Arzneimitteln in der Umwelt erarbeitet. Die in vielfältigen Monitoringkampagnen gemessenen Umweltkonzentrationen sowie Ergebnisse ökotoxikologischer und physiko-chem...

Within a multitude of groundwater catchment areas, ground- and raw water quality depend foremost on the reaction between organic carbon and dissolved oxidants, in particular O2(aq), nitrate und sulphate. Although the redox reactions between organic carbon (as the reductive agent) and the oxidants follow the principles of chemical thermodynamics, th...

In many countries bank filtration is used as the first step of drinking water treatment. River water percolates the riverbed and aquifer sediments which serve as a natural filter removing substances like nitrate, particular and dissolved organic matter and trace elements. Raw water quality, therefore, depends on both river water quality as well as...

Ensuring future drinking water supply requires a tough management of groundwater resources. However, recent practices of economic resource control often does not involve aspects of the hydrogeochemical and geohydraulical groundwater system. In respect of analysing the available quantity and quality of future raw water, an effective resource managem...

Nitrate pollution of groundwater due to excessive application of fertilizers and manure in agriculture is an increasing problem in many countries and displays a major threat to drinking water supply. Ensuring future drinking water supply requires a sustainable management of water resources regarding both quantity and quality. As illustrated by the...

Aim The aim of this work was to investigate, which human and veterinary pharmaceuticals are of high ecological relevance due to the input into the environment as well as with regard to the effects and behaviour in the environment. Furthermore, the state of knowledge concerning the ecologically relevant substances and the need of research was evalua...

Ensuring future drinking water supply requires a tough management of groundwater resources. However, recent practices of economic resource control often does not involve aspects of the hydrogeochemical and geohydraulical groundwater system. In respect of analysing the available quantity and quality of future raw water, an effective resource managem...

Langfassung zum Abschlussbericht

The hydrochemistry and the microbial diversity of a pristine aquifer system near Garzweiler, Germany, were characterized. Hydrogeochemical and isotopic data indicate a recent activity of sulfate-reducing bacteria in the Tertiary marine sands. The community structure in the aquifer was studied by fluorescence in situ hybridization (FISH). Up to 7.3...

The hydrochemistry and the microbial diversity of a pristine aquifer system near Garzweiler, Germany next to the open-pit lignite mine Garzweiler 1, were characterized. Hydrogeochemical and isotopic data indicate a recent activity of sulfate-reducing bacteria in the Tertiary marine sands. The community structure in the aquifer was studied by fluore...

Für die Gewinnung von Trinkwasser stellt Grundwasser nach wie vor die Hauptressource dar. Grundwasser ist jedoch noch immer gefährdet, z.B. durch die intensive landwirtschaftliche Flächennutzung in Grundwassereinzugsgebieten. In Nordrhein-Westfalen wird seit 10 Jahren durch freiwillige Vereinbarungen zwischen Landwirtschaft und Wasserwirtschaft ver...

Combined hydrochemical, geochemical and isotopic investigations of solid and dissolved sulphur- and carbon-species from different aquifer levels allow to distinguish two geochemical cycles: The first one is represented by the sedimentary pyrites which have been formed during the Tertiary by bacterial sulplate reduction. These pyrites are characteri...

Combined hydrochemical, geochemical and isotopic investigations of solid and dissolved sulphur- and carbon-species from different aquifer levels allow to distinguish two geochemical cycles: The first one is represented by the sedimentary pyrites which have been formed during the Tertiary by bacterial sulphate reduction. These pyrites are characteri...