Advances in Geosciences www.adv-geosci.net 1680-7340 1680-7359 11 Large-scale hydrological modelling and the European Union water policies 2007 10.5194/adgeo-11-93-2007 http://www.adv-geosci.net/11/93/2007/ http://www.adv-geosci.net/11/93/2007/adgeo-11-93-2007.html http://www.adv-geosci.net/11/93/2007/adgeo-11-93-2007.pdf 93 99 2007-06-15 Impacts of global change on water-related sectors and society in a trans-boundary central European river basin &ndash; Part 2: from eco-hydrology to water demand management T. Conradt M. Kaltofen M. Hentschel F. F. Hattermann fred.hattermann@pik-potsdam.de F. Wechsung Potsdam Institute for Climate Impact Research, P.O. Box 60 12 03, 14412 Potsdam, Germany Institute for Water Resources Planning and Systems Research (WASY GmbH), Waltersdorfer Strasse 105, 12526 Berlin-Bohnsdorf, Germany This second part of the paper presents the details of the eco-hydrological model SWIM simulating the natural water supply and its coupling to WBalMo, a water management model. <br><br> Based on the climate scenarios of the STAR model, SWIM simulates the natural water and matter fluxes for the entire Elbe River area. All relevant processes are modelled for hydrotopes and the resulting discharges are accumulated in subbasins. The output data are input for the water management model WBalMo and the quality models Moneris and QSim. <br><br> WBalMo takes storage management, inputs and withdrawals into account and analyses how demands by industry, power plants and households will be met at changing natural supply conditions. Some of the first results shall be presented here. Arnold, J., Srinivasan, R., Muttiah, R., and Williams, J.: Rainfall-runoff modelling for assessing impacts of climate and land-use change, J. Am. Water Resour. As., 34, 73&ndash;89, 1998. Dietrich, O., Dannowski, R., and Quast, J.: GIS-based water balance analyses for fen wetlands, in: International Conference on Application of Geographic Information Systems in Hydrology and Water Resources Management, HydroGIS'96, Vienna, Austria, Vol. of Poster Papers, pp 83&ndash;90, 1996. Gerstengarbe, F. and Werner, P.: Simulationsergebnisse des regionalen Klimamodells STAR, in: GLOWA-Elbe I &ndash; Integrierte Analyse der Auswirkungen des globalen Wandels auf Wasser, Umwelt und Gesellschaft im Elbegebiet, edited by: Wechsung, F., Becker, A., and Gräfe, P., Potsdam Institute for Climate Impact Research, Potsdam, Germany, Vol 95 of PIK report, ISSN 1436-0179, pp 110&ndash;118, 2005. Kaden, S., Schramm, M., and Redetzky, M.: ArcGRM: Interactive simulation system for water resources planning and management in river basins, in: Research Basins and Hydrological Planning, edited by: Xi, R.-Z., Gu, W.-Z., and Seiler, K.-P., Taylor & Francis, London, UK, ISBN 90-5809-611-4, pp 185&ndash;192, 2004. Krysanova, V., Hattermann, F., and Wechung, F.: Development of the ecohydrological model SWIM for regional impact studies and vulnerability assessment, Hydrol. Processes, 19, 763&ndash;783, 2005. Watermark Numerical Computing and S.S. Papadopulos and Associates, Inc.: PEST online resource, http://www.sspa.com/pest/index.htm, current user manual by Doherty, J., 5th ed., 336~pp., 2004, UNIX PEST version 11.2, 2007.