IJEP 42(7): 849-856 : Vol. 42 Issue. 7 (July 2022)
1. University of Madras, Centre for Natural Hazards and Disaster Studies (CNHDS), Chennai-600 005, Tamil Nadu, India
2. Mizoram University, Department of Geography and Resource Management, Aizawl – 796 004, Mizoram, India
The landslide susceptibility is the probability of occurrence of landslide in an area which is predicted based on the certain local condition of the terrain. There are number of landslide probability methodologies which have been used by researchers for last few years. The objective of this paper is to assess the landslide susceptibility in the part of the Tehri dam in the state of Uttrakhand, India. Total of 198 landslides have been recognized using world view-2 satellite image and Geological Survey of India (GSI). In this study five most important causative factors have been taken, such as slope, aspect, geology, drainage and landuse/ land cover. Remote sensing data and ancillary data have been used to prepare landslide inventory map and thematic layers for susceptibility zonation mapping. Slope, aspect and drainage maps have been derived from the ASTER DEM satellite data. Geology map has been taken from the Geological Survey of India. Landuse/ land cover map has been prepared using world view -2. Each causative factor was given weight on the basis of information value (IV) method. The IV method is statistics-based methodology which is used as a landslide probability technique. The final landslide susceptibility map was prepared by using the sum of each weighted value on the GIS platform. The result of this study was classified into five classes, such as very high, high, moderate, low and very low. The final map will be helpful for the local people, engineers and planner for mitigating the hazard and also demarcate the highly vulnerable and low vulnerable zones in the study area.
Information value, Geographical information system, Landslide, Susceptibility, Tehri dam
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