基于网格化的凉山州西部雷击森林火灾风险区划  

Based on Gridded Lightning Strike Forest Fire Risk Zoning in Western Liangshan Prefecture

作　　者：谢东志 郑自君 胥鑫逸 XIE Dong-zhi;ZHENG Zi-jun;XU Xin-yi(Yuexi County Meteorological Bureau,Liangshan Yi Autonomous Prefecture 616650,Sichuan,P.R.China;Liangshan Meteorological Bureau,Xichang 615000,Sichuan,P.R.China;Wuxi University,Wuxi 214000,Jiangsu,P.R.China)

机构地区：[1]越西县气象局,四川凉山彝族自治州616650 [2]凉山州气象局,四川西昌615000 [3]无锡学院,江苏无锡214000

出　　处：《森林防火》2024年第4期65-69,共5页JOURNAL OF WILDLAND FIRE SCIENCE

基　　金：高原与盆地暴雨旱涝灾害四川省重点实验室科技发展基金项目(SCQXKJYJXMS202210);凉山州2023年度科技计划项目(23ZDYF0182)。

摘　　要：为降低凉山州西部森林防火期火险,采用2005—2020年的逐日雷电定位仪数据和1971—2020逐日气象要素序列,选取雷击点密度、地闪强度、高程、地形起伏、土壤电导率和森林植被覆盖度6个指标,通过AHP方法构建森林火险指数,并使用ArcGIS 10.2软件对其进行区划。结果表明:凉山州西部总体雷击森林火险等级较高,中风险区占比54.1%,低风险区占比3.23%,高风险区呈零散分布,占比42.67%。To reduce the fire risk during the forest fire season in western Liangshan Prefecture,daily lightning locator data from 2005 to 2020 and daily meteorological data from 1971 to 2020 were utilized.Six indicators,including lightning strike point density,ground flash intensity,elevation,terrain undulation,soil conductivity,and forest vegetation coverage,were selected to construct a forest fire risk index using the AHP method.ArcGIS 10.2 software was employed to delineate the risk zones.The results indicated that the overall lightning-induced forest fire risk in western Liangshan Prefecture is high,with medium-risk areas accounting for 54.1%,low-risk areas accounting for 3.23%,and high-risk areas scattered and occupying 42.67%of the total area.

关 键 词：GIS 雷击起火 森林火灾 地理区划 防火期 

分 类 号：S762.3[农业科学—森林保护学]