基于加权信息量法的杨陵区地质灾害易发性评价

GEOLOGICAL HAZARD SUSCEPTIBILITY EVALUATION IN YANGLING DISTRICT BASING ON THE WEIGHTED INFORMATION METHOD

杨陵区位于陕西省关中平原中部,地质环境条件较复杂,人类工程活动强烈,地质灾害较发育。为精准识别地质灾害发育规律,为政府决策和国土空间规划提供基础数据,在杨陵区地质灾害风险调查的基础上,采用ARCGIS软件空间分析模块和层次分析法,将全区划地质灾害易发性分为高、中、低3个级别,其中高易发区面积0.99km^(2);中易发区面积8.35km^(2);低易发区面积123.47km^(2)。最后,通过受试者工作特征曲线(ROC)和拟合曲线法进行验证,结果表明评价精度较高。

Yangling district is located in the west of Guanzhong Plain of Shaanxi Province.Because of the relative complex geological environment conditions and the intensity human engineering activities,geological hazards are well complex.In order to accurately identify the development regularity of geological hazard and provide basic data for government decision-making and territorial space planning.In foundation of the risk of geological hazard survey in Yangling District,adopting the spatial analysis mode of the ARCGIS software and AHP,the susceptibility degree of geological disasters in the whole region is divided into three grades:high,medium and low.The high susceptibility area is 0.99km^(2);the medium susceptibility area is 8.35km^(2);the susceptibility area is 123.47km^(2).Finally,the result showed that the evaluation accuracy is relative higher by the receiver operator characteristic curve and curve fitting.