Since sudden localized torrential downpours have been increasing in recent years, it is required to establish disaster prevention / mitigation measures for more speedy and accurate flood control activities and evacuation guidance, etc. We developed an inundation forecast program for processing data on inland and river floods as a whole by integrating the models of river and sewerage hydraulic analysis and flood analysis covering the basins of Kanda River. Incorporating this program, we built a system having the functions to collect the real- time data, convert the data for input in the inundation forecast program, and convert computation results into the data format for distribution to distribute them on the web. This system is expected to support speedy and accurate disaster prevention / mitigation activities in urban areas.
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