In order to study the impact of tornado disasters in China,by collecting statistics on the disasters of tornados,the hierarchical analysis structure model of tornado disaster risks was established,and the risk zoning of tornado disaster was developed.The research results show that,summer is the period of high incidence of tornadoes,about 2/3 of tornado disasters occur in June to August and about 1/3 occur in spring.The areas with higher frequency of tornado disasters in China are Jiangsu and Guangdong provinces,followed by Heilongjiang,Shandong,Inner Mongolia and Anhui provinces.The total number of tornadoes in these provinces during the statistical period exceeded 61.2%of the total number of tornadoes.According to the zoning results of tornado disaster risk,it can be divided into four levels of tornado disaster risk areas.The highest risk areas are located in East China,and the higher risk areas include Central China and South China.
NETL
NSTL
万方数据
维普
