Visualization Technology On Landslide

Landslide is a comprehensive discipline. In the landslide study, it involve a large amount of information related to three-dimensional space and position, for instance geological information, position information, etc. But it is difficult to grasp any information in the past technology of studying, and it is unable to carry on fictitious engineering design, assign and construct and then analyse the result in three-dimensional space. With the application of landslide visualization technology, the above problems can receive satisfied settlement. Landslide visualization is one of the most effective methods to reproduce and analysis synthetically the three-dimensional information of landslide body in real time. The application of visualization on landslide will greatly prompt the development of landslide and bring to the enormous benefits for the society, the economy and ecosystem system.The research of the paper can be divided into two parts. In the first part, on the basis of summarizing landslide study and visual technical development, landslide visual technical is probed into and predicted, the total frame of landslide visual technical research is gived, and every part is analysed in detail. It will make landslide visual technical form a whole and system and establish the reliable foundation for system and further research on landslide visual technical.In the second part, taking Zhafangping Landslide in Reservoir area of Three Gorges as an example, the data gathering, data dealing with, design and visualization of digital terrain model and 3-D sliding surface model are presented in detail. Using latest visual software IDL (Interactive Data Language) and combining TRIGRID function with TRIANGULATE function in IDL, Regular Network terrain model and 3-D shallow and deep sliding surface model of Zhafangping Landslide body based on Delaunay triangular network is set up. It makes the sliding surface turn from " recessiveness " into " dominance ", and gets numerousdifferent three- dimensional cubic chart, contour topographic map, the combine model of terrain model and contour topo-graphic map . And every visual model has analysed and compared in detail. The analyse shows: the three-dimension visual terrain model of the landslide body not only embodies totally its terrain characteristic and sectional characteristic, but also can make the ground characteristic analysed and hold on whole; Compared to the deep sliding surface, the shallow sliding surface has the similar whole slope and is more smooth and simple, so it is worse in the stability. And the parts of the deep sliding surface have great difference, it causes the different stability, Among them the stability of the midst part is the worst. So the shallow sliding should be controlled importantly, and the controlling scheme should be assigned in the midst part of the deep sliding surface in the controlling design.