陕西省雷电灾害易损性分析、评估及易损度区划

Vulnerability Analysis' Assessment and Zoning of Thunderstorm Disasters in Shaanxi Province

根据2002～2007年陕西省10个市的雷暴日和雷电灾害统计资料，结合陕西各市的经济和人口密度特征，提出了雷暴日数、雷电灾害频度、生命易损模数及经济易损模数作为各市雷电灾害易损性评估指标，并在此基础上，给出了陕西各市雷电灾害易损度评估结构。采用四级分区法对上述雷电灾害易损性评估指标进行了分级，并赋予各等级如下定值：极高级为1．0、高级为0．8、中级为0．5、低级为0．2。将陕西省10市按照四个雷电灾害易损性评估指标的所属等级获取相应等级值，将各市四个评估指标的等级值累加得到平均值作为雷电灾害易损性评估的评价指数，并利用上述四级分区法形成陕西省雷电灾害易损度区划。

According to the thunderstorm disaster frequency, thunderstorm days and economic and population data of 10 cities in Shaanxi Province from 2002 to 2007, the day numbers, frequency, vulnerability evaluation indexes and economic loss rate of thunderstorms vulnerability analysis are presented as vulnerability assessment index of thunderstorm disasters in these cities. Based on them, the vulnerability assessment structures of thunderstorm disasters in each city of Shaanxi are given. Then, the vulnerability assessment indices of thunderstorm disasters are classified as four degrees with given values as following ： the extreme high degree is 1.0, the high degree is 0. 8, the moderate degree is 0. 5, and the low degree is 0. 2. The comprehensive vulnerability assessment indices of these ten cities are also graded as corresponding four degrees. Finally, vulnerability zoning of the thunderstorm disasters in Shaanxi province is made by use of the above-mentioned four degrees.