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Abstract
Landslides are common geological hazard taking place in the hilly areas. The Nilgiri district is vulnerable to landslide catastrophes, which is directly linked to the prosperity and development of the district. The main principle of the present study is to elucidate the landslide susceptible zones in the Nilgiri district so that it could be useful towards landslide disaster risk reduction.
In this study, the analytical hierarchy process (AHP) is used to create susceptibility maps. For this purpose, ten layers including landslide inventory, rainfall, lithology, lineament density, lineament buffer, aspect, slope, soil, soil depth, NDVI has been considered. Using this method each layer is split into smaller factors, then these factors are weighted based on their value, and to end with the last prepared layers are put together and the final map is generated. The mapping software ArcGIS is used to create the layer maps, which are used in the production of the landslide susceptibility maps.