The Geographic Information System Of Landslide And Debris-Flow Along Xichang-Panzhihua Expressway

The landform of west of China is mainly composed of mountainous region and its geological condition is very complex. the natural hazards, such as landslide, debris-flow, is the great threaten to the road construction and management, especially to the truck line. The whole road willout of service if any place is breaken or blocked by the natural hazards. The high-grade highways have promoted the regional economic growth greatly, however, its constructing process may destroy the geological construction, then trigger landslide activeties or revive the ancient landslide. In the other sides, the deposition mass of landslide is apt to be the soild material source of debris-flow. Therefore, for the sake of safety, effectively management and monitoring the slope, landslide and debris-flow alone the highway is really necessary. Such task is also one of the greatest problems of management and construction of Xichang-Panzhihua expressway in the west of China.This paper, employing the GIS, discuss the management and disaster prevention of the high slope, landslide and debris-flow along the Xichang-Panzhihua expressway, and the main work is introduceted below in detail.(1) The intuitionistic 3D landslide and debris-flow models, constructed by the 3D modeling technique, is an important aspect and very valuable for the disaster prevention and mitigation. Moreover, these 3D models can provide us a more indeep understanding of the complex geological bodies. This paper discuss the modeling method based on GIS platform for the landslide and debris-flow, analyzes the landslide's volume character and the spatial character of debris-flow using these 3D models.(2) The ground water is the major factor that affects the landslide's stabilitiy. And the drainage tunnel is popular engineering measures used to dewater. The accuracy method for computing the volume of dewatered body of the drainage tunnel. Using this method, the influence of drainage tunnel on the landslide's stability can be estimated before puting into practice. Therefore, the effiency of...