[关键词]
[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 b~ 60 b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。
[Key word]
[Abstract]
The landslide is the one of main geological disasters in Wangcang County of Sichuan Province. The occurrence of land2 slide in this county is primarily controlled by the factors such as lithology, topography. and precipitation. Based on 90 historical landslides in Wangcang County, a grey 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 from 15 b to 60b, 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 as2 sessment.
[中图分类号]
[基金项目]
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0( 1212010535501) ; 地下水资源数据集成与服务系统建 设( 1212011120426)