Construction of GIS and Database for Debris Flow Potential Study of Chen-You-Lan River Watershed

The problems caused by debris flows are becoming more and more serious in Taiwan. In order to perform the risk assessment for hazard mitigation, the database of debris flow rivers of Chen-You-Lan Watershed was constructed. The potential factors as well as the natural environmental data of debris flow river and basin were built into database. The client-server spatial geographic information system was built for querying, demonstration , and spatial analysis of the database. This database and GIS can be used for further analysis and classifications of potential debris flow hazard, as well as scenario simulations for hazard reduction and mitigation.