Entwicklung eines Entscheidungsunterstützungssystems zur Anpassung an den Klimawandel am Beispiel der Wasserwirtschaft

Water management adaption strategies due to climate change are a very prevailing topic which is often discussed in the media. In the work at hand, the author has treated this subject within the research project of the Federal Ministry of Environment (BMU), Nature Protection and Reactor Safety - coached by the Federal Environment Agency (UBA) - and has developed a new decision support system (DSS), named "WASKlim-EUS". With the aid of this new system possible future situations of selected water uses - for certain drainage areas - can be demonstrated, taking into account climate change. On the basis of different adaption measures and their evaluation by stakeholders a defined adaption strategy can be implemented. The DSS is based on the methods of fuzzy-logic, the analytic hierarchical process and the utility analysis.Therefore the basis of the climate change and the meteorological and hydrological effects on the water management in Germany in general and on different water uses in particular were explained. Hence the exigency to develop a adaption strategy clearly emerges.The concept of the newly developed WASKlim-EUS - which in a four step configuration ranges from the identification of parameters, the evaluation of current states and measures to the election of the adaption strategy with the according program of measures - was described and the used methods were explained in detail.By means of three mesoscale study areas the new DSS was put into practice. For the purpose user conferences and stakeholder interviews were carried out and evaluated. For the Wupper catchment need of action was indicated for the sectors of water power plants, cooling water output and input and fishery. For the catchment area of the Salza all considered water uses were identified as vulnerable. For the catchment area of the Upper Iller, need of action was detected for the water situation in general, the fishery and the effluent from sewage treatment plants. Furthermore the quality and sensitivity of the results were discussed and further requirements for development were shown.