2010年10月奄美大島豪雨時の氾濫特性と住民行動

抄録

Record torrential rain fall caused heavy flood disaster on 20th October, 2010 in the Amami Island in Japan. The disaster was an unexpected occurrence and most of the residents were off their guard due to large experience of rain. However, the number of victims was low in spite of the record localized downpour. The purpose of this paper is to investigate the characteristics of the disaster and to find out the reasons why the toll of victims is low in order to mitigate the damage from disasters in other areas. Therefore, we carried out interview survey to residents and field survey in some areas. The following results were obtained: Traditional methods of river improvement functioned efficiently to reduce flood damages. Well developed connection among local citizens and a spring near the evacuation site worked effectively in evacuating.