基于雷电易发评价体系下的广西雷电区划

Lightning division of Guangxi based on the evaluation system of lightning proneness

利用1960—2013年广西地面气象站观测雷暴资料、2009—2018年二维雷电监测定位资料和2016—2018年三维雷电定位监测资料,以闪电密度为评估要素,建立层次分析模型,绘制广西雷电易发区划图;并加载环境高程数据、2000—2019年雷灾数据以及2005年—2018年广西人口、GDP统计资料,计算雷电灾害风险值,绘制广西雷电灾害风险区划图。结果表明,广西雷电易发区划分为极高易发区、高易发区、中等易发区三个等级,其中以中等易发区为主,该区面积约占全区总面积的47%;极高易发区域主要分布在桂南、桂东南及桂东地区。广西雷电灾害风险划分为极高风险、高风险和中等风险三个等级,以中等风险为主,广西雷电灾害风险区划与雷电易发区域分布态势基本一致,等级变化趋势由沿海向内陆递减。

Using Guangxi ground weather station observational thunderstorm data from 1960 to 2013,two-dimensional lightning monitoring positioning data from 2009 to 2018,and three-dimensional lightning positioning monitoring data from 2016 to 2018,an analytic hierarchy process model was established with the lightning density as the evaluation element,and the lightning susceptibility zoning map of Guangxi was drawn.The results showed that the lightning-prone areas in Guangxi were divided into three levels:extremely high-prone areas,high-prone areas,and medium-prone areas.The medium-prone areas were the main areas,accounting for 47%of Guangxi;the extremely high-prone areas were mainly distributed in southern Guangxi,southeastern Guangxi and eastern Guangxi.Lightning disaster risk in Guangxi was divided into three grades:extremely high risk,high risk and medium risk.Most areas were medium risk.The lightning disaster risk zoning in Guangxi was basically consistent with the distribution of lightning-prone areas,and the grade change trend was decreasing from the coast to the inland.