土石流危険度の評価法に関する研究

Abstract

Some indices of risk due to the debris flows at a certain location in a basin such as the liabilityof occurrence, maximum discharge, total volume, etc. are discussed based on the systematic andmechanical considerations on the phenomena. Evaluation method of the indices under a par-ticular rainfall condition is proposed. The method is partly checked and proved valid, at theeast part of the Shodo island in cases of 1974 and 1976 disasters, concerning the relations between thevalues of the indices of liability of occurrence and the actual ratios of occurrence.