Urban Risk Assessment Research of Major Natural Disasters in China

Abstract

According to disaster system theory and the natural disaster database of China,this paperbuilds the urban vulnerability indexon the basis of the integrated urbanization level index(CL) of hazard-affected bodies;and considering the structural damage and the influence on traffic of different naturaldisasters,this paper chooses five major disaster types(including flood,earthquake,debris flow-rockslide,typhoon and dust storm) to build and compute the integrated intensity index of major natural haz-ards(QC).Then through qualitative analysis and semi-quantitative calculation,the integrated urban riskof major natural disasters in china is divided into five grades,namely very high,high,medium,lowandvery lowgrades,and the corresponding assessment map is worked out.At last,some further discussion isdone about the integrated risk assessment of natural disaster chains.