Abstract:

Based on RS (remote sensing) and GIS (geographic information system), landslide hazard assessment of Tiantai in Xuanhan County, Sichuan is studied by AHP (analytic hierarchy process) method. Five evaluation elements including lineament structure, road, land use, slope grade and slope aspect are selected for landslide hazard assessment. The study area is divided into six regions by weight overlay as follows，landslide extremely easily happening, landslide very easily happening, landslide easily happening, landslide possibly happening, landslide difficultly happening and landslide hardly ever happening. Compared with field survey and related study results, it is found that the results coincide properly with the actual situation. The risk of regional landslide hazard can be assessed by the method provided in this paper.

Key words: RS, GIS, AHP method;landslide, hazard assessment