基于GIS和加权信息量模型的富源县地质灾害易发性评价

构建科学合理的地质灾害评价体系是地质灾害防治的基础,对区域防灾减灾工作具有重要指导意义。选取高程、坡度、工程地质岩组、距离构造的距离、年平均降雨量、距离水系的距离、距离主干道路的距离、煤矿工程活动共8个指标,通过GIS平台使用加权信息量模型对富源县进行地质灾害易发性评价。结果表明：采煤活动与工程地质岩组是富源县地质灾害发育的重要影响因子,区内地质灾害低易发区、较低易发区、中易发区、较高易发区、高易发区面积(占比)分别为383.8km₂⁽19.54%)、449.77km₂⁽31.12%)、759.67km₂⁽23.53%)、1004.99km₂⁽13.93%)和630.97km₂⁽11.89%),其中地质灾害高易发区与采煤活动区分布较一致,是灾点较为集中的区域。通过ROC曲线验证,正确率为77.95%,表明区划较为合理,可以为富源县地质灾害防治提供参考。

Evaluation Of Susceptibility To Geological Hazardin In Fuyuan County Based On GIS And Weighted InformationModel

constructing a scientific and reasonable geological disaster evaluation system is the basis of geological disaster prevention and control, it has important guiding significance for regional disaster prevention and mitigation. eight indexes are selected, including elevation, slope, engineering geological rock group, distance from structure, annual average rainfall, distance from water system, distance from main road and coal mine engineering activities. through the GIS platform, the weighted information model is used to evaluate the susceptibility of geological disasters in Fuyuan County. the results show that coal mining activities and engineering geological rock groups are important factors affecting the development of geological disasters in Fuyuan County. the area ( proportion ) of low-prone area, low-prone area, medium-prone area, high-prone area and high-prone area of geological disasters in the area are 383.8 km2 ^{( 19.54 % ), 449.77 km}2 ^{( 31.12 % ), 759.67 km}2 ^{( 23.53 % ), 1004.99 km}2 ^{( 13.93 % ) and 630.97 km}2 ^{( 11.89 % ),} among them, the high-risk areas of geological disasters are more consistent with the distribution of coal mining activities, and are areas where disaster points are more concentrated.respectively. through ROC curve verification, the correct rate is 77.95 %, indicating that the zoning is reasonable and can provide reference for the prevention and control of geological disasters in Fuyuan County.