防災計画

[IV-141] Evaluation of natural disaster risk before and after the Great East Japan Earthquake using extended GNS

*梶谷 裟和¹、向井 友亮¹、小山 倫史¹、伊藤 和也²、菊本 統³ (1. 関西大学社会安全学部、2. 東京都市大学工学部、3. 横浜国立大大学院都市イノベーション研究院)

Keywords:GNS, GIS, Natural disasters, Great East Japan Earthquake

Gross National safety for natural disasters (GNS) is newly developed index to express quantitative risks for natural disasters. It is composed of exposure and vulnerability based on differences in the social, economic and natural conditions of each place. In this study, a new method to evaluate exposure in more detail using GIS was developed. The exposure, structural and non-structural countermeasures and thier time evolutions in Iwate, Miyagi, Fukushima prefectures before and after Great East Japan Earthquake were investigated.