Wuppertal, Germany


Wuppertal, Germany
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Fleischhauer M.,TU Dortmund | Greiving S.,TU Dortmund | Flex F.,TU Dortmund | Scheibel M.,Wupperverband | And 7 more authors.
Natural Hazards and Earth System Science | Year: 2012

The EU Flood Risk Management Directive 2007/60/EC aims at an active involvement of interested parties in the setting up of flood risk management plans and thus calls for more governance-related decision-making. This requirement has two perspectives. On the one hand, there is (1) the question of how decision-makers can improve the quality of their governance process. On the other hand, there is (2) the question of how the public shall be appropriately informed and involved. These questions were the centre of the ERA-Net CRUE-funded project IMRA (integrative flood risk governance approach for improvement of risk awareness) that aimed at an optimisation of the flood risk management process by increasing procedural efficiency with an explicit involvement strategy. To reach this goal, the IMRA project partners developed two new approaches that were implemented in three case study areas for the first time in flood risk management:

1. risk governance assessment tool: An indicator-based benchmarking and monitoring tool was used to evaluate the performance of a flood risk management system in regard to ideal risk governance principles;

2. social milieu approach: The concept of social milieus was used to gain a picture of the people living in the case study regions to learn more about their lifestyles, attitudes and values and to use this knowledge to plan custom-made information and participation activities for the broad public.

This paper presents basic elements and the application of two innovative approaches as a part of an "involvement strategy" that aims at the active involvement of all interested parties (stakeholders) for assessing, reviewing and updating flood risk management plans, as formulated in the EU Flood Risk Management Directive 2007/60/EC. © Author(s) 2012. CC Attribution 3.0 License.

Willmitzer H.,Thuringer Fernwasserversorgung | Grosse N.,Limnosa Sachverstandigenburo | Mehling A.,Harzwasserwerke GmbH | Nienhuser A.,Bergischen Trinkwasser Verbund GmbH BTV | And 2 more authors.
GWF, Wasser - Abwasser | Year: 2010

Advantageous effects of zooplankton grazing in establishing high water quality in lakes and reservoirs often have been documented. Zooplankton filtration, particularly by larger daphnids, distinctly reduces particle concentrations in the water column giving rise for clearwater. Consequently, water processing treatment costs are reduced. In 2009, ATT has finished a zooplankton project which related the results of microscopic zooplankton analysis and water quality data from 53 reservoirs in Germany. There is ample evidence from the results, that the potential of biofiltration can be assessed from the analysis of zooplankton community size. Accordingly, a CSI (=community size index) as a new method for the assessment of bio filtration in reservoirs was created. The CSI revealed as a valuable tool for optimizing food-web management in reservoirs. Thus, as top-down control is to be an essential tool for reservoirs water quality management beside external nutrient abatement reservoir water quality management can be improved.

Kolisch G.,WiW mbH | Schirmer G.,WiW mbH | Salomon D.,Wupperverband
Water Practice and Technology | Year: 2011

Digester gas produced at sewage plants is usually used in combined heat and power plants (CHPP) or boilers and only a minor portion is wasted in gas torches. In combination with an optimised power consumption of the sewage plant and the implementation of a co-digestion even an energy self-sufficiency of sewage plants is possible (Kolisch et al., 2009). Selling of the digester gas to external consumers or an upgrade to natural gas quality with subsequent injection into the natural gas grid might be alternatives to the conventional use. The mentioned options were investigated in consideration of the current energy consumption of sewage plants. The results show that the internal power production by a CHPP is currently most economic. However, the implementation of a local energy network in order to to deliver an energy surplus to external users can be feasible. © IWA Publishing 2011.

Beeneken T.,Institute fuer technisch wissenschaftliche Hydrologie GmbH itwh | Erbe V.,Wupperverband | Messmer A.,Groebenseeweg 2 | Reder C.,HanseWasser Bremen GmbH | And 6 more authors.
Urban Water Journal | Year: 2013

Application of real time control (RTC) in urban drainage systems is discussed in this paper as a potential solution for water management tasks. Though, in engineering practice, often the opinion prevails that to perform RTC requires far more effort than to use conventionally operated systems. Depending on the objectives and the boundary conditions of the entire urban drainage system under review, the additional effort (and extra cost) needed may well be limited. This concerns measurement and control devices as well as the planning process involved and the adaptation of daily operations. Due to the increased flexibility of controlled systems, their degree of utilisation can be essentially improved. With that, it is not only possible to reduce environmental impacts, but also to achieve operational objectives more easily. © 2013 Copyright Taylor and Francis Group, LLC.

Agency: European Commission | Branch: H2020 | Program: RIA | Phase: WATER-2a-2014 | Award Amount: 7.82M | Year: 2015

The water sector needs improved climate prediction and downscaling based on consistent grounds (IPCC 5th Assessment Report, 2013). There is also a need for near future weather scenarios and anticipation of their impacts in the water cycle together with risk management strategies. BINGO will provide demand-driven solutions for a number of specific climate-related challenges in particular for highly vulnerable water resources of strategic importance. Water managers and other stakeholders will then be provided with information on specific climate scenarios at the space/time resolution fitting their needs, enabling them to act at various geographical levels (local, regional and European). BINGO aims at reducing the uncertainty of climate predictions and developing response strategies to help society manage that uncertainty. An innovative approach consists of enrolling end-users from the start, identifying specific vulnerabilities, needs and concerns about future climate. BINGO is built around 7 research sites in Northern and Southern Europe, covering a representative range of climatic conditions as well as combinations of water systems and water pressures. They illustrate a variety of water cycles at local/regional scales in Europe over various timescales, as well as common problems, including floods and droughts; water quality pressured by CSO, agriculture and competing demands for water (urban/tourism; agriculture/food security; hydropower). To guarantee sound management strategies for future weather challenges, BINGO will develop and validate all solutions built by strong dynamic interaction of researchers with end-users and decision makers throughout the project. By creating such knowledge alliances, water managers and other stakeholders can share awareness of climate challenges, thus increasing the possibilities of collaboration in order to manage and better cope with future climate challenges.

As a result of the new DIN 19700, an in-depth study was begun at the Wupperverband. For this purpose a start was made with the Bever Dam. It was possible to make important findings here and synergies could be generated between individual line departments. It was possible to use these as early as the subsequent in-depth studies, such as on the Wupper Dam. In this regard sub-projects can be completed collectively for all dams of the Wupperverband. Experiences and long-term benefits should be explained using practical examples.

The failure of the dam body of a dam system can result in serious harm to the people, the environment and the economy. The operator of a dam system is responsible for its safety, and is obliged to appoint suitable specialist personnel with adequate qualifications for its operation. An essential component of the system-specific safety concept is the professional qualification of the personnel employed for its operation and maintenance. It is therefore the responsibility of the operator to ensure that his personnel management is based on continual further training of the operating personnel.

The holistic watershed-scale approach ("Integrale Talsperrenbewirtschaftung") considers the transport and fate of water, sediments, chemicals, nutrients and bacteria in the terrestrial and aquatic compartments to be tidily interlinked. Therefore, the reservoirs water quality and water quantity can not be managed disparately. If the reservoirs management is to be eficient not only the multiple environmental compartments (grassland, agricultural land, forest; streams, reservoir) but also their interplay has to be managed appropriately. Due to saturation effects input management is of major importance for reducing the input of sediments, nutrients and chemicals into the aquatic environment. In order to improve the nutrient management at the source e.g. farmer cooperations ("Landwirtschaftliche Kooperationen") have been built. Additionally however, the ecosystem structure of each compartment needs a proper management in order to increase the natural retention capacity not only of the landscape but also of the aquatic ecosystems (ecotechnological approach). Accordingly, the processes that remove transform and store water and substances have to be considered. The particularities for each environmental compartment as well as its proper management are discussed. In general, increasing water retention reveals of major importance for increasing sediment, nutrient and chemical retention capacity in the environmental compartments.

The relevance of eutrophication related processes for the ecological integrity of rhithral streams and thus for the challenge to accomplish a good ecological status is outlined. Consequently, the need for establishing adequate eutrophication monitoring and assessment procedures in running waters is recommended. If the restoration of eutrophicated rhithral streams is to be successful restoration measures not only have to rely upon a proper phosphorus management but inevitably need to be embedded in an integral ecosystem oriented approach. However, the underlying mechanisms of this multiple cause effect relations have to be acknowledged.

As expected from its short renewal time, the hypertrophic Lingese Reservoir responded rapidly but incompletely to external nutrient reduction in 1993. Although there was a sudden decline in lake phosphorus and chlorophyll concentrations, the 'turbid regime' revealed resistance in this weakly stratified reservoir of intermediate depth. Draining the reservoir in autumn 1995 provided an unprecedented opportunity for sediment treatment-the phosphorus-rich surface layer was inverted and covered with deeper nutrient-poor layers-and removal of the dense cyprinid fish stock which had not responded to sewage diversion, at least in the short term. Commencing with refilling in 1999, a new fish stock was built up from 2000 by only stocking predators (fingerlings of pike, pike-perch and larger specimens of rainbow-trout in the first years) in combination with catch restrictions. Concomitantly, with the appearance of daphnids in 1999, a 'clear water regime' was established and lake water phosphorus concentrations decreased at unchanged external loading. Reduced zooplanktivory as well as reduced fish-mediated phosphorus release from the sediments were driving mechanisms behind successful reduction of internal loading and achievement of a 'clear water regime'. Hence, phosphorus concentrations were revealed to be a response variable not only to input management but also to food-web management. As the development of cyprinid dominance was prevented in the long-term, there is ample evidence that the fish community responded to the applied management measures as expected featuring successful food-web management. Overall, the biological structure was revealed to be of major importance for lake phosphorus availability and turbidity as in shallow lakes, without, however, the establishment of macrophyte dominance. © 2010 Springer Science+Business Media B.V.

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