GIS支持下基于因子分析法的都汶路沿线地质灾害易发性评价  

GIS-Based susceptibility assessment of geological hazards along the road from Dujiangyan to Wenchuan by factor analysis

作　　者：孟祥瑞[1] 裴向军[1] 刘清华[1] 张雄[2] 胡云华[3] MENG Xiangrui PEI Xiangjun LIU Qinghua ZHANG Xiong HU Yunhua(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengda University of Technology, Chengdu, Sichuan 610059, China Sichuan Shutong Geotechnical Engineering Company, Chengdu, Sichuan 610041, China The Third Surveying and Mapping Engineering Institute in Sichuan Province, Chengda,Sichuan 610500,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]四川省蜀通岩土工程公司,四川成都610041 [3]四川省第三测绘工程院,四川成都610500

出　　处：《中国地质灾害与防治学报》2016年第3期106-115,共10页The Chinese Journal of Geological Hazard and Control

基　　金：四川测绘地理信息局支撑课题(J2014ZC12);地理空间信息工程国家测绘地理信息局重点实验室开放研究基金(201419)

摘　　要：在国道317线都江堰至汶川段沿线约11 065 km2的区域内,以震后遥感影像解译为基础结合野外地质调查,得到2 100多个地质灾害点。基于GIS技术分析了坡度、坡向、地形起伏度、地层岩性、断层距离、降雨强度、植被覆盖等因素同灾害点分布的关系,并以此为基础对各因素进行标准化赋值;选取样本数据,运用因子分析法确定了各因素的权重并建立研究区地质灾害易发性评价模型;利用评价模型在GIS平台下对研究区的地质灾害易发性进行评价,并依照自然间断点法将研究区划分为高度易发区、中高度易发区、中度易发区、中低度易发区、低度易发区和极低度易发区6类;利用AUC对评价结果进行验证,AUC值达到75.48%,表明评价结果准确率显著,评价分区效果良好。Along the national road 317 between Dujiangyan and Wenchuan,2100 geological hazards are got in11065km2 area by interpreting the remote sensing map and field investigation after Wenchuan earthquake.Based on the relationship analysis between geological hazards distribution and the factors include slope angel,slope aspect,terrain fluctuation,stratum,distance to the fault,rainfall intensity and vegetation cover. There concludes the standard value of each factor. The model of geo-hazards susceptibility assessment of study area is built by confirming the weight of each factor. Every factor is gotten through analysis sample data with the method of factor analysis. With the method of nature break under the GIS platform within the certain model.The study area is divided into 6 areas include high susceptibility area,medium high susceptibility area,medium susceptibility area, medium low susceptibility area, low susceptibility area and extremely low susceptibility area. The result whose value of AUC is 75. 48%,which is proved to be accurate and the effect of zoning is pretty good.

关 键 词：公路沿线 地质灾害 易发性评价 GIS 因子分析法 

分 类 号：P642.23[天文地球—工程地质学]