With respect to the enormous damages floods have caused in Central Europe in the last few years (Odra 1997, Elbe 2002), the use of detention areas for reducing flood risk is of high importance in modern flood management. By the controlled flooding of sparsely populated areas with low damage potential the risk for downstream areas with higher vulnerability can be reduced. The report presents the results of a research project funded by the German Federal Ministry of Research. The aim of the project was to carry out a cost benefit analysis for different scenarios regarding flood hydrographs and flood management. Damages caused by the controlled flooding of the detention basins were compared to the resulting damage reduction downstream. Investigating several flood scenarios it could be shown that the use of detention basins can efficiently attenuate large river floods provided that the retention volume is large compared to the flood peak and the retention occurs in time of peak discharge.

Author names: 
Gocht, M.
Year: 
2004
Reference: 

Gocht, M. (2004). Nutzen-Kosten-Analyse. In: Bronstert, A. (ed.). Möglichkeiten zur Minderung des Hochwasserrisikos durch Nutzung von Flutpoldern an Havel und Oder (pp. 173-181). Brandenburgische Umwelt Berichte 15. Potsdam: Mathematisch-Naturwissenschaftlichen Fakultät der Universität Potsdam.

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