基于GIS与证据权模型的地质灾害易发性评价——以广安市前锋区为例  

Geologic hazards susceptibility assessment based on GIS and Weight of evidence method--A case study of Qianfeng district,Guangan City

作　　者：张冠绍 刘任鸿 刘招 ZHANG Guan-shao;LIU Ren-hong;LIU Zhao(CCC-FHDI Engineering Co..,Ltd.,Guangzhou 510230,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510220

出　　处：《地下水》2023年第2期132-137,共6页Ground water

摘　　要：本文以四川广安市前锋区为研究区,将区内的地质灾害作为研究对象,通过选取坡度、坡向、高程、工程地质岩组、构造、道路、水系、土地利用类型等8个影响因子,基于GIS与证据权模型两者相结合,对广安市前锋区开展地质灾害易发性评价研究,并将其按照高、中、低和极低划分为四类地质灾害易发性等级。研究结果表明,高易发区、中易发区、低易发区和极低易发区,分别占前锋区面积的6.82%,26.74%,32.11%和34.34%。通过ROC特征曲线与横坐标轴所围成的面积(AUC)作为最终的评价精度,其值为87.97%,评价结果可靠,可为广安市前锋区的地质灾害防治和城乡规划建设提供科学依据。This paper takes the Qianfeng District of Guang an,Sichuan Province as the research area,and takes the geological disasters in the area as the research object.By selecting eight influencing factors,including slope gradient,slope direction,elevation,engineering geological rock group,geological structure,road,water system and land use type,based on the combination of GIS and weight of evidence model,the paper carries out the evaluation and research on the vulnerability of geological disasters in the Qianfeng District of Guang an,Sichuan Province.And it is divided into four kinds of geological disaster susceptibility levels according to high,medium,low and very low.The results showed that the areas with high,medium,low and very low susceptibility accounted for 6.82%,26.74%,32.11%and 34.34%respectively.The area enclosed by R0C characteristic curve and the horizontal axis(AUC)was used as the final evaluation accuracy,and its value was 87.97%.The evaluation results are reliable,and could provide scientific basis both for geological disaster prevention-control,urban-rural planning and construction in theregion.

关 键 词：GIS 证据权模型 地质灾害 易发性评价 

分 类 号：P694[天文地球—地质学]