基于GIS的小江断裂中北段滑坡灾害危险性评价

小江断裂中北段作为金沙江下游重大水电工程库区内最重要的活动断裂构造,其沿线滑坡地质灾害发育,严重制约了当地的经济和社会发展。在详细调查了小江断裂中北段沿线滑坡地质灾害的基础上,选取了坡度、坡向、工程地质岩组、岸坡结构、断裂构造等9个影响因子作为评价指标,对研究区滑坡灾害的发育分布规律进行了分析研究,并采用AHP-CF法建立了滑坡灾害危险性评价模型,利用GIS空间分析功能得出了研究区滑坡地质灾害危险性分区。通过检验曲线验证滑坡地质危险性评价结果可知,AUC值为80%。

Assessment of landslide hazard in the middle and northern Xiaojiang fault zone based on GIS

The middle and northern of the Xiaojiang fault zone is the most important active structure in the reservoir area of the major hydropower project in the lower reach of the Jinsha River, where the geological effects of landslides along have seriously restricted the local economic and social development. Based on detailed investigations of the landslides along the fault, nine influencing factors including slope, slope direction, geotechnical rock group, bank structure and fault structure are selected as the evaluation indexes to study the distribution of potential landslides in the study area. A risk assessment model of landslide hazard is established by the AHP-CF method, and the risk areas are delineated by using GIS spatial analysis function. The test curves show that the AUC value is 80%.