区域雷灾分布特征及易损度区划

Regional Distribution and Vulnerability Regionalization of Lightning Disaster

根据汀苏省近9年来的雷电灾害资料、45年的雷暴日资料以及近4年的地闪资料，以江苏省的自然环境、人文环境、气候环境为背景，分析了江苏省13个地级市的雷电灾害分布特征，指出汀苏省雷电灾害多发生在6～8月，雷电灾害主要是物理损坏和电气与电子系统失效，其中无锡和苏州最为典型。从江苏省各地级市的资料中提取了7个雷灾易损性评价指标，用SAS软件中主成分分析方法对各地级市的雷灾易损性评价指标进行了综合评估。结果表明，区域雷灾易损性不仅取决于区域自然条件对雷电磁场环境变化的敏感性，而且还取决于区域社会体系对雷电灾害的承受能力。用聚类分析法生成了江苏省的雷灾易损度区域划分图，为区域防雷减灾规划提供了科学依据。

By means of the recent 9-year lightning disaster and 45-year thunderstorm day and 4 year cloud-to-ground lightning flash data in Jiangsu Province, an analysis is made of the distributions of lightning disasters in 13 cities based on the background of natural and human culture environment in Jiangsu Province. It is point out that lightning disasters mainly occur from June to August, and damages are mainly found in physical devices and electricity and electronic systems, with Wuxi and Suzhou being most typical. Vulnerability indexes are extracted and calculated, and the comprehensive assessments are made on these indexes using the method of the principal component analysis with SAS software. The results indicate that the regional thunder disaster vulnerability is depended on not only the sensitivity of the regional natural condition to the environmental variation of the lightning magnetic field and but also the bearing capacity of the social system in the region to lightning disasters. The vulnerability regionalization chart of lightning disasters in Jiangsu Province, based on cluster analysis, is given, which can provide a scientific basis for regional lightning protection and disaster reduction.