RESEARCH ON THE FORMATION LAW OF THE ACCUMULATION LAYER LANDSLIDE IN DAGUAN COUNTY BASED ON THE TOPOGRAPHY AND GEOMORPHLOLGY FACTORS

In order to reveal the formation law of accumulation layer landslide in the complex mountainous area, we carry out the analysis of influence index of topography and geomorphology factor on landslide development degree by comprehensive influence index analysis based on basic data of accumulation layer landslide at 98 sites of Daguan area, and divide the influence index grade of different factors on landslide development. The influence of different topography and geomorphology conditions on the development and occurrence of accumulation layer landslide is very different. The slow slope(21~35) of medium height(60~90m),North East, West convex type(T) is the most conducive to the development of landslide. Based on the analysis of the results, we establish the initial evaluation criteria of the occurrence level of accumulation layer landslide on the basis of topography and geomorphology factors in the mountain region of the northeast of Yunnan province, thereby provide a rapid identification method of the occurrence level of unstable slope for the geologic disaster investigation.