洪水ハザードマップの作成についての一考察

Abstract

By the development of the mathematical modeling for overland flooding flow, inundation flow can be treated in hydraulic manner. A map denoting hazard area due to flood or predicting the distribution of maximum overland flood depth is released by river administration. From these aspects, establishment of refuge system in a sheltered area against flooding has become a new research subject.This paper deals with a modeling of refuge system at a supposed inundation area in terms of network theory and considers effects of refuge measures and residents behaviour during refuge. First, the distribution of the residents requiring refuge and the allocation of suitable refuges are examined. Next, using the residents behaviour model during refuge, and taking into account of inundation flow characteristics and refuge execution rate by residents, several simulations are conducted which can express the temporal situation of refuge. Based on the above results, the effects of refuge system and some tasks to be solved are discussed.