The Development Law and Type of Xiangxi River Watershed in the Three Gorges Reservoir Area
Xiangxi river watershed is located in the three gorges reservoir area between Zigui syncline and Huangling anticline.Its fragile geological environment and landslide disasters become a serious threat to the usual operation of highway and the safety of resident's life and property.Based on the scene,the landslide is divided into two catego-ries,including bending-sliding landslide on the west side of the main river and the sliding-tension landslide on the eastern side of the main river.The space distribution,development characteristics and quantity of landslide are ana-lyzed.The results show that the topography is one of the controlling factors for the development of landslide.The con-vex slope,20 degrees to 40 degrees slope and convex mountain facing empty in three sides are easily slipped.There is a corresponding relationship between the lithology and the development of the landslide.The sandstone and mudstone interbedded is higher than limestone strata in landslide density.The formation of landslide is closely associated with the slope geological structure,mud sandstone interbedded with its structure to the slope landslide has the highest density,the mud sandstone interbedded with its structure reverse to the slope breeds the largest landslide.Reservoir and high-way construction is the two human factors of the formation of landslides.
reservoir areaXiangxi river watershedlandslidetypedevelopment law
NETL
NSTL
万方数据
