江西赣南于都县银坑地区地质灾害易发性评价分析

Evaluation and analysis of geological hazard susceptibility in Yinkeng area, Yudu County, southern Jiangxi Province

在系统分析江西赣南于都县银坑镇区域地质、工程地质、环境地质的基础上,结合灾点分布现状、地质灾害诱发因素、地形地貌条件等,运用证据权法、地质灾害综合危险性指数法、AHP(层次分析)法,对研究区地形地理条件、地质环境条件、地质灾害发育情况、人类工程活动情况等因素进行单因子栅格重分类处理,在此基础上,着重考虑地质灾害的形成条件,运用证据权法,对影响地质灾害的各因子根据相对重要性两两比较,再进行矩阵运算、归一化处理求得各因子的权重,最后运用Arcgis map软件进行加权总和运算,圈定出研究区地质灾害易发程度分区图,最终得出研究区地质灾害地质灾害极高易发区4个,高易发区4个,中易发区4个,低易发区3个,为地方政府防灾治灾提供依据。

Based on the systematic analysis of the regional geology,engineering geology and environmental geology of Yinkeng Town,Yudu County,southern Jiangxi,combined with the distribution status of disaster points,geological disaster inducing factors and topographic and geomorphic conditions,the topographical and geographical conditions,geological environmental conditions and The development of geological disasters,human engineering activities and other factors are reclassified by single factor grid.On this basis,the formation conditions of geological disasters are emphatically considered,and the evidence weight method is used to compare the factors affecting geological disasters according to their relative importance,and then matrix operation and normalization are carried out to obtain the weight of each factor,Finally,ArcGIS map software is used for weighted sum operation to delineate the zoning map of geological disaster susceptibility in the study area.Finally,it is obtained that there are 4 extremely high prone areas,4 high prone areas,4 medium prone areas and 3 low prone areas in the study area,so as to provide basis for local government disaster prevention and control.