富源县位于云南省东部,该区地形地貌复杂,地质环境脆弱,加之煤矿工程活动等诱发因素,导致地质灾害频发,危及人民生命财产和生产生活安全.构建科学合理的地质灾害评价体系对地质灾害防治工作具有重要意义.选取高程、坡度、工程地质岩组、地质构造、降雨量、水系、道路工程、煤矿工程活动8个指标,基于地理信息系统(geographic information system,GIS)和加权信息量模型对富源县进行地质灾害易发性分区评价.结果表明:煤矿工程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,将研究区划分为低易发区、较低易发区、中易发区、较高易发区和高易发区,面积(占比)分别为383.8 km2(19.54％)、449.77 km2(31.12％)、759.67 km2(23.53％)、1 004.99 km2(13.93％)和 630.97 km2(11.89％),其中地质灾害高易发区与采煤活动分布较一致,是灾害点较为集中的区域.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 Information Model
Fuyuan County is located in the eastern part of Yunnan Province,with complex terrain and fragile geological environ-ment.In addition,coal mining engineering activities have led to frequent geological disasters,endangering people's lives,property,and production safety.Constructing a scientific and reasonable geological disaster evaluation system is of great significance for the pre-vention and control of geological disasters.Eight indexes,including elevation,slope,engineering geological group,structure,average annual rainfall,water system,main road and coal mining activity,were selected to evaluate the susceptibility of geological hazard in Fuyuan County based on geographic information system and weighted information model.The results show that coal mining engineering activities and engineering geological formations are key factors affecting the development of geological hazards in Fuyuan County.The area(proportion)of low-prone,lower-prone,medium-prone,higher-prone and high-prone geological hazards in Fuyuan County are 383.8 km2(19.54％),449.77 km2(31.12％),759.67 km2(23.53％),1 004.99 km2(13.93％)and 630.97 km2(11.89％),respectively.The distribution of high-prone areas is consistent with that of coal mining activities,which is a region with concentrated disaster points.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.
Fuyuan Countygeological disastersprone partitionlevel analysisinformation model
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