基于GIS空间分析的吉林省辉南县地质灾害易发程度评价

辉南县地质环境条件复杂,人类工程活动强烈,崩塌、滑坡、泥石流、地面塌陷等地质灾害频发,严重威胁当地居民安全,影响旅游业和当地的经济发展,本文针对影响以上4类地质灾害的易发条件,分布选取适合的评价因子进行打分,然后进行网格剖分,再采用综合指数法并利用Mapgis空间分析功能,得出崩塌滑坡、泥石流、地面塌陷的易发程度分区图,最后通过叠加得到全区地质灾害易发程度综合区划,划分出高、中、低三类易发区,为地质灾害防治提供依据。

Geological hazards prone degree of Jilin Province Huinan County based on GIS spatial analysis

Huinan district has complex geological environment conditions. Strong human engineering activities cause series geological hazards, frequent collapse, landslides, surface collapse and mudslides, which threaten the residents, tourism industry and economic construction. This article aim at the above four types of geological disasters, respectively selects suited evaluation factors for scoring. Then by mesh generation , using comprehensive index method and Mapgis space analysis features, the prone degree partition map of collapse, landslides, surface collapse and mudslides are obtained. Finally, get comprehensive zoning of geological hazards prone degree by susperposition, divide into high, medium, low prone area, and provide the basis for the prevention of geological disasters.