Drinking Water Engineering and Science www.drink-water-eng-sci.net 1996-9457 1996-9465 3 1 2010 10.5194/dwes-3-11-2010 http://www.drink-water-eng-sci.net/3/11/2010/ http://www.drink-water-eng-sci.net/3/11/2010/dwes-3-11-2010.html http://www.drink-water-eng-sci.net/3/11/2010/dwes-3-11-2010.pdf 11 20 2010-01-29 Impact of decreasing water demand on bank filtration in Saxony, Germany T. Grischek grischek@htw-dresden.de D. Schoenheinz C. Syhre K. Saupe University of Applied Sciences, Faculty of Civil Engineering/Architecture, Division of Water Sciences, Friedrich-List-Platz 1, 01069 Dresden, Germany Bank filtration has been of great importance to the drinking water supply in Germany for many decades. The water quality of pumped raw water from bank filtration sites depends to a high degree on the water quality of the infiltrating surface water and the landside groundwater, the mixed portion of both, as well as the flow and transport conditions in the aquifer. Following the improvement of river water quality and a drastic decrease in water demand during the last 20 years in Germany, the influence of landside groundwater quality has become more important for the raw water quality of waterworks relying on bank filtration. The hydrogeologic analysis of three bank filtration sites in Saxony and the management of abstraction rates and well operation in response to fluctuating water demand are discussed. BDEW: German Federal Association of Energy and Water Resources Management, www.bdew.de, last access: 1~July~2009 (in German). City of Dresden: Drinking Water Abstraction, www.dresden.de, last access: 1~July~2009. Chiang, W.-H. and Kinzelbach, W.: 3D-Groundwater Modeling with PMWIN, Springer, Berlin, Heidelberg, New York, 2001. FSA: Public water supply by water source, Federal Statistical Authority Germany, www.destatsi.de, last access: 1~July~2009 (in German). Grischek, T. and Ray, C.: Bank filtration as managed surface – groundwater interaction, Int. J. Water, 5(2), 125–139, 2009. Grischek, T., Schoenheinz, D., and Ray, C.: Siting and design issues for riverbank filtration schemes, in: Riverbank Filtration: Improving Source-Water Quality, edited by: Ray, C., Melin, G., and Linsky, R., Kluwer Academic Publ., 291–302, 2003. Grischek, T., Schoenheinz, D., and Nestler, W.: Unexpected groundwater flow beneath the River Elbe at the bank filtration site Meissen, Germany, in: Water resources and environment research, edited by: Schmitz, G. H., ICWRER~2002, 1, 116–120, 2002. Grischek, T., Nestler, W., Dehnert, J., and Neitzel, P.: Groundwater/river interaction in the Elbe River basin in Saxony, in: Ground Water Ecology, edited by: Stanford, J. A. and Vallett, H. M., American Water Resources Association, Herndon, 309–318, 1994. Hillenbrand, T. and Schleich, J.: Determinants of water demand in Germany, energie wasser-praxis, 6, 38–42, 2009 (in German). Kühn, W. and Müller, U. (Eds.): Export oriented research and development in the field of water supply and treatment, part drinking water, DVGW, Germany, 2005 (in German). Martin-Alonso, J.: Combined use of surface water and groundwater for drinking-water production in the Barcelona metropolitan area, Proc. 2nd Int. Riverbank Filtration Conf., 16–19.09.2003, Cincinnati, 217–222, 2003. Schoenheinz, D., Grischek, T., and Worch, E.: Investigations on temperature effects on the DOC degradation during river bank filtration, Proc. Annual Conference of the Water Chemistry Society, 17.–19.05.2004, Bad Saarow, 150–154, 2004 (in German). Schwanke, M.: Groundwater flow modelling and investigations into the development of the water balance at waterworks Göttwitz, Master thesis, University of Applied Sciences Dresden, Faculty of Civil Engineering/Architecture, 2008 (in German). Zhen, C.: MT3D, a modular three-dimensional transport model, S.S. Papadopulos and Associates, Inc., Rockville, MD, 1990.