滑坡灾害的发生对社会经济及人民生命财产造成了重大损失,开展孕灾环境敏感性研究具有重要的意义。以滑坡灾害频发区——泸水县为研究对象,选取高程、坡度、坡向、道路、河流、岩土体类型、断裂带及土地利用8个因子,采用确定性系数概率模型分析滑坡易发敏感性,并通过敏感性指数模型分析各个因子对滑坡灾害发生的影响程度,确定有利于滑坡发生的条件,绘制了泸水县区域内滑坡敏感性分区图。结果表明:中等及以上级别的敏感区域内发生的滑坡灾害数量占总数的92.36%,滑坡灾害与孕灾环境敏感性分析具有较好的吻合性;分析结果对泸水县滑坡防治有一定的借鉴作用。
The landslide hazards has seriously endangered social economy and people's life and property, obviously that is a study of some significance which refers to sensitivity to disaster-pregnant environmental factors of landslide. This paper takes, Lushui County, a landslide-prone area, as the research object, selects 8 factors including elevation, slope, slope aspect, road, river, rock soil mass types, fault zone and the land use, to analyzes landslide- prone sensitivity with deterministic coefficient probability model, meanwhile, determines each factor~ impact degree according to the sensitivity-exponential models, ascertains the beneficial conditions to occurrance of landslid, and draws the zoning map of landslide sensitivity in region of Lushui County. The results show that, the landslide disas- ter occurring in medium and obvious sensitivity zones is 92.36% of the total. Landslide disaster coincides well with disaster-pregnant environment sensitivity analysis . The results of the analysis have a certain reference meaning to the landslide prevention in Lushui County .