The application of hydrodynamic models as integrative tool between flood protection and ecological demands using a morphologically based evaluation method

摘要

On the basis of a case study at the Kamp River/Lower Austria the possibilities of an integrative evaluation of an ecologically oriented flood protection measure are discussed. Beside the hydrodynamic modelling of predefined flood events, low and mean discharge situations were simulated to evaluate the abiotic conditions for main fish species. The morphological developments of the flood protection measure were documented by terrestrical survey in 2003 and 2004. Furthermore it was possible to create a digital terrain model (DTM) of the former, natural river bed (1890) which was used as the "Leitbild" situation. With a geomorpholog-ically based evaluation method the success of ecologically orientated flood protection measures was discussed according to the "Leitbild" situation using ecological and economical parameters.