The Improvement of the Prediction Accuracy of the System of Real-Time Type Hazard Map of Slope Failures Disasters Caused by Heavy Rainfalls

Abstract

Japan has been vulnerable to landslide disasters caused by heavy rainfalls. The most common trigger of landslide disasters in our country is slope failure. In order to mitigate landslide disasters, it is important to evaluate the potential of slope failure events in space and time quantitatively and to develop the system that send the disaster information based on result of the evaluation. We have developed the system of real-time type hazard map of slope failure disasters caused by heavy rainfalls. In this paper, we focus on the depth of surface soil layer, which is one of the input parameters, and aim at a further improvement of prediction accuracy of the slope failure potential.