Author(s): M. J. Jpirotton
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Keywords: No Keywords
Abstract: This paper aims to summarize the global hydraulic studies carried out in order to prevent the floodings of a small river located in the western part of Belgium. A first stage is devoted to compute the hydrograph resulting from extreme rainfalls on the catchment, using a distributed physically based model. Its numerical propagation on the studied site reflects the actual situation in the vicinity of the river site. Due to natural reservoirs, the flood peak is dampened and its base extended, i.e. the flood subsides. This peak reduction is first fitted to the reality by unsteady computations that handle the lateral exchanges between the planned floodplains and the main river. Besides, they led to optimise the location and the size of the planned lateral reservoirs as well as to forecast their impacts on the surroundings. This paper summarizes simplified approaches that saved much computational effort.
Year: 1997