A decision support system for an optimal design of sea dikes with respect to risk

摘要

Decision support systems (DSS) are under development in coastal zone management in Germany in the moment. An example for a DSS is the Risk Information System Coast (RISC) dealing with the flood risk of the German tidal low lands at the estuaries Weser and Jade. RISC provides information on the probability of failure of dikes derived from water levels and wave climate. The consequences of dike failure are also visualized in RISC including the mapping of flood zones and the calculation of loss and risk. The DSS supports the design of sea dikes optimising the height of the dike with respect to construction cost and risk taking into account additional coastal defence elements, e.g. foreland and summer dike.