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An urban flood dynamic simulation model with GIS

An advanced model, Urban Flood Dynamic Simulation Model (UFDSM), has been developed. The UFDSM is a GIS-based distributed hydrological model, both surface flow and sewer flow are taken into account. The spatial and temporal distribution of the flooding water stage and flooding water flux are calculated. Therefore, the inundation area, flooding duration, flood hazard map, and the flood risk management can be analyzed through the UFDSM. Meanwhile, it presents the implementation of geographic information system (GIS) technology in UFDSM. It shows the steps of acquiring, storing, updating, analyzing, and displaying these data in conjunction with UFDSM. The viability of the UFDSM/GIS linkage in a microcomputing environment is demonstrated on a case study area in the Liuhuahu subdivision in Guangzhou City, China.