Abstract
As the prevention of all water disasters by using of structural measures is very difficult, the present task is to construct non-structural disaster measures as well as the usual structural ones. The importance of overland flood flow analysis increases for examination of these various counter measures. The aim of this study is to develop the synthetic system for analysing water phenomenon in river, sea and urban region in flooding. The heavy rain in Tokai district is treated in this study. The suitable distribution of inundation water depth is obtained in the inundation states of the urban area. From the simulation results, the validity of the numerical analysis models systematized here and the effect of the sewer system in flood is discussed.
