Assessment of sediment arrival hazard during heavy rainfall for wide region

Abstract

Numerical simulation tools based on cellular automata and multi-agent systems have been developed to evaluate the arrival hazard of simultaneous sediment flows over wide areas during heavy rainfall. This paper discusses the validity and applicability of the developed tool by conducting a parametric study using simple slope models and a replicated analysis of an actual landslide disaster during heavy rainfall. A case study is also presented in which the sediment arrival hazard is evaluated at several canyon outlet points.