Landside susceptibility assessment based on weighted information value model: A case study of Wenchuan earthquake 10 degree region

Information value model is a widely used landslide susceptibility assessment method. However, it neglects the weights of different factors. This paper proposes the weighted information value model based on AHP. The impact of seismic intensity (SC), land-use types (LUT), lithology types(LT), fault density (FD), terrain (T) and rainfall(R) on landslide in the 512 Wenchuan earthquake-hit 10 degree region of the Longmenshan fault zone(LFZ) is assessed with GIS spatial analysis. According to the weighted information value of these controlling factors, the study area can be divided into five classes: extremely, high, intermediate, low and very low susceptible areas for landslide occurrence.