SEDIMENT HAZARD ANALYSIS BASED ON ANTECEDENT RECIPITATION INDEX AND REGIONAL DATA IN TOKYO

Abstract

We have evaluated relationship between sediment hazard, regional geomorphic properties and heavy rainfall in Tokyo. It tried to clarify regional characteristic of the sediment hazard by using spatial numeric information. The antecedent precipitation index was used sediment analysis as heavy rainfall condition. The results obtained are as follows; 1) It was clarified that the sediment hazard have a greater tendency to long term rainfall than short term heavy rainfall. 2) It shows a regular relationship between relief energy and antecedent precipitation index in case of sediment hazard evaluation excepting the complex geo geological condition.