Articles written in Sadhana
Volume 46 All articles Published: 18 June 2021 Article ID 0122
Landslide events are responsible for substantial financial damages, human causality, and irreversible fluctuations in the natural landscape. This paper discusses and deals with landslide inventory mapping using a digital elevation model and a knowledge-based numerical rating scheme. In this study, we have used six different parameters affecting landslides such as a slope map, an aspect map, a curvature map, distance from the road and streamline, and elevation. The voids in the Digital Elevation Model (DEM) data were filled as a part ofpreprocessing. The Landslide Susceptible Maps (LSMs) and Landslide Hazards Zonation (LHZ) maps were developed by computing the correlation between the landslide-impacting factors with past landslide positions using the Analytic Hierarchy Process (AHP) technique. The AHP model is utilized to establish the weightage value for every parameter, and the summation of the product signifies the Landslide Susceptible Index (LSI) value for every pixel. Based on the derived LSI, the area under consideration was categorized into five susceptibilityclasses from very low to scars. The LSMs were confirmed and verified using prevailing landslide inventory records. The overall prediction accuracy of the AHP model is 90.91%. The susceptibility maps can be very helpful in the identification of the more troublesome areas, which is highly critical for studying landslidehazards, risk assessment and community, and regional planning.