GIS AND INFORMATION MODEL BASED LANDSLIDE SUSCEPTIBILITY ASSESSMENT IN GRANITE AREA OF GUANGXI PROVINCE

Landslides are frequent in granite area of Guangxi Province, where rock structure is loose, weathered clinosol and residual soils are thick and distributed widely, and rainfall is abundant. Based on statistics, the indexes of landslide susceptibility evaluation are selected, including slope, elevation, geological structure, vegetation, rainfall and human engineering activities. The landslide susceptibility in the granite area is divided into districts, based on ArcGIS software and information model. The landslide susceptibility evaluation results are compared with the existing landslides and hidden troubles in the granite area. The comparison result shows that the susceptibility assessment is correct and can be used for the forecasting of landslide and early warning in the granite area.