旺苍县滑坡灾害危险性分析与评价  

Analysis and assessment of landslide hazards in Wangcang County

作　　者：朱吉祥[1] 张礼中[1] 周小元[1] 陆琰[1] 

机构地区：[1]中国地质科学院水文地质环境地质研究所,石家庄050061

出　　处：《南水北调与水利科技》2015年第6期1172-1176,共5页South-to-North Water Transfers and Water Science & Technology

基　　金：中国地质调查局国土资源大调查项目"全国主要城市环境地质综合评价"(1212010535501);地下水资源数据集成与服务系统建设(1212011120426)

摘　　要：滑坡是四川省旺苍县最主要的地质灾害之一.该区滑坡的发生主要受控于地层岩性、地形地貌以及降水等因素.以旺苍县90 个历史滑坡点作为主要的分析评价对象, 通过构建基于信息熵的灰色评价系统, 对该区滑坡的分布规律进行分析, 并获取旺苍县滑坡危险性区划.结果表明, 旺苍县滑坡的高发区主要集中在地貌类型为构造侵蚀中山、坡度范围为15°-60°以及年平均降水量较丰富的松散堆积物分布区.以该区39 个不稳定斜坡作为分析评价结果的验证对象, 验证结果表明, 以基于信息熵的灰色模型获取的旺苍县滑坡危险性分析评价结果具有可信的精度.The landslide is the one of main geological disasters in Wangcang County of Sichuan Province.The occurrence of landslide in this county is primarily controlled by the factors such as lithology,topography.and precipitation.Based on 90 historical landslides in Wangcang County,agrey assessment system was developed using entropy thesis to analyze the distribution law of landslides and determine the zonation of landslide risk in Wangcang County.The results showed that the high occurrence of landslide is mainly located in the areas where the landscape type is medium mountain of tectonic erosion,the slope range is from15°to 60°,the precipitation is rich,or the stratum is the loose deposit.Additionally,39 unstable slopes were used to verify the assessment accuracy,which suggested that the grey system based on the entropy thesis can provide reliable landslide risk assessment.

关 键 词：滑坡 危险性评价 信息熵 灰色理论 旺苍县 

分 类 号：P694[天文地球—地质学]