基于GIS的广东省平远县地质灾害易发区定量评价

Geological hazards easy-happening zoning evaluation of Pingyuan,Guangdong by applying GIS

平远县地质环境条件复杂,人类工程活动强烈,地质灾害发育、危害严重。文章通过对平远县地质灾害发育现状、形成条件及影响因素分析,选取了评价因子,在网格剖分的基础上,分别计算出每个单元的易发程度指数,然后利用Map GIS的空间分析功能划分出地质灾害高、中、低和不易发区,为科学地开展地质灾害防治提供了依据。

The geological environment condition of Pingyuan County is very complicated,human engineering activities is intensive,the geological hazard is easy-happen and damage is serious.This paper analyzed the distribution situation,forming condition and influencing factors of geological hazard,chosen the evaluation factors,based on mesh division,calculated easy-happening degree in each mesh,then divided Pingyuan County into the high,medium,low easy-happening area and noneasy-happening area by using the spatial analysis function of MAPGIS,provided the scientific basis for the geological hazard prevention and administration.