基于斜坡发育指标的旺苍县滑坡危险性评价

Assessment of Landslide Hazard of Wangcang County Based on Slope Development Factors

四川省旺苍县是滑坡的频发区。由于特殊的地质条件与地形地貌特征,该区的滑坡呈现特殊的演变规律,传统的评价方法很难精确地获取该区滑坡的危险性分析结果,研究以该区的地层岩性、地层构造、接触面倾角、地下水类型、坡高、坡度、坡形、斜坡类型以及碎石含量9个斜坡发育指标作为评价因子,通过引入评价因子的特征函数表征各因子对滑坡的影响模式,建立基于斜坡发育指标的滑坡危险性评价模型,评价结果能够比较精确地反映旺苍县的滑坡危险性分布特征,对于该区的滑坡防治工作具有一定的实际意义。

Wangcang County is the area with the most frequent landslide in Sichuan Province.The evolution of the landslides in this area is very special because of the unusual geological conditions and topographical characteristics,hence it′s difficult to obtain the accurate result for the traditional assessment approaches.This research selected nine development factors of slope which contain the lithology,tectonic,inclination of contact surface,groundwater types,and the structure of the slope,and then the character functions was introduced to describe the influence modes of these factors,finally the landslide hazards assessment model was established based on the development factors of slope.The result can be more accurately reflect the distribution characteristics of the landslides in Wangcang County,and there was some practical significance to landslide prevention work of the study area.