STATISTICAL ANALYSIS ON CHARACTERISTICS OF RISK OF NATURAL DISASTERS

Abstract

Characteristics of risk of natural disasters are studied based on available statistics of Japanese long term historical data and intenational data on damage loss. Not only intensity but also mode of risk expressed in terms of the ratio between losses of human lives and properties is found important and useful to investigate the risk characteristics. Based on these findings, risk, vulnerability and hazard are modeled by linear multiple input and multiple output system, and norms of vulnerability and hazard are identified based on this model. The structure of vulnerability is shown to change with respect to economical development, and several useful findings on natural disaster risks are derived based on this model.