基于GIS加权叠加的区域地质灾害易发性评价  

Evaluation of Regional Geological Disaster Susceptibility Basedon GIS Weighted Superposition

作　　者：刘玉娟 LIU Yu-juan(College of Geology and Construction Engineering,Anhui Technical College of Industry and Economy,Hefei 230051,China)

机构地区：[1]安徽工业经济职业技术学院地质与建筑工程学院,安徽合肥230051

出　　处：《兰州文理学院学报（自然科学版）》2023年第5期37-42,共6页Journal of Lanzhou University of Arts and Science(Natural Sciences)

基　　金：2021年安徽省教育厅高校自然科学研究重点项目(KJ2021A1537)。

摘　　要：以滁州市定远县为研究对象,针对其地质灾害形成背景,在详细野外调查基础上,选择地质灾害发育密度、地形坡度、工程地质岩组、地质构造、高程以及人类工程活动统共6个致灾因素,构设易发性综合评测体系.利用ArcGIS软件,对于因子数据展开综合评析,基于网格划分形式展开重组,通过重分类计算方法将因子赋值,最后采用加权叠加模型进行易发性分区划分.对易发性分区结果予以分析,结果得到其中不易发区占比共计8.13%,合计约为223.33 km^(2);低易发区占比为69.36%,合计约为1905.29 km^(2)中易发区占比15.21%,合计约为417.81 km^(2);高易发区占比共计7.30%,合计约为200.66 km^(2).结果相对科学、直观、准确.Through field investigation on the formation background of geological disasters in Dingyuan County,this paper uses six hazard-causing factors including geological disaster development density,terrain slope,engineering geological rock formation,geological structure,elevation and human engineering activities to study the susceptibility of geological disasters in Dingyuan County.The data of these factors are deeply analyzed by ArcGIS software,reorganized by grid division,and the factors are assigned by reclassification calculation method,finally,a weighted superposition model is used to partition susceptibility zones.The results of susceptibility zoning show that the areas that are not prone to geological disasters in Dingyuan County account for 8.13%of the total area of the county,with a total of 223.33 km^(2);the areas with low risk of geological disasters account for 69.36%of the total,with a total of 1905.29 km^(2);the medium-prone areas accounted for 15.21%,with a total of about 417.81 km^(2);the high-prone areas of geological disasters account for 7.30%of the total area,with a total of 200.66 km^(2).The results are relatively scientific,intuitive and accurate.

关 键 词：地质灾害 易发性分区 GIS加权叠加 定远县 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P694[天文地球—测绘科学与技术]