基于GIS与AHP的旺苍县滑坡灾害危险性评价

摘要

Using the data of geological disasters in Wangcang County in 2016,combined with Wangcang basic geographic data and DEM data,selecting slope,geomorphology,lithology,average rainfall,rivers,roads and other factors,risk zoning and evaluation of landslide in Wangcang County were conducted based on GIS and AHP.The results showed that the highest risk areas of landslides account for 1.3％ of the total area;moderate risk areas account for 30.6％ of the total area;low danger zone account for 39.1％ of the total area;safe areas account for 29.0％ of the total area.Zoning of risk areas of landslide can provide reference for decision-making in local disaster prevention and mitigation work.%利用2016年旺苍县地质灾害详查数据,结合旺苍基础地理数据和DEM数据,选取坡度、地貌、地层岩性、多年平均降雨量、河流以及道路等因子,通过GIS与AHP对旺苍县滑坡进行危险性分区与评价.结果表明:旺苍县滑坡灾害高度危险性区分布在东部和南部,占总面积的19.5％;中度危险区占总面积的27.3％;低度危险区占总面积的32.4％;安全区占总面积的20.8％.旺苍县滑坡灾害的危险性分区可为当地防灾减灾工作提供决策参考.