DEVELOPMENTOFREALTIMEFLOODSIMULATIONMODELINURBANILOW-LYING RIVER BASIN

Abstract

This study aims to develop a real time flood simulation model in an urbanized low-lying river basin (Tsurumi river of Japan). The model has been developed by enhancing the distributed hydrological model (WEB-DHM) to account for urban land surface characteristics and effects of flood control ponds and coupling 1D unsteady flow model to the enhanced WEB-DHM. The enhanced WEB-DHM model computes the flow rate in the upper stream and the 1D unsteady flow model computes the time-varying water surface level in the lower stream accounting for tides and effects of retention ponds. The system has been validated against past flood events along the study region with acceptable accuracy.