An approach for GIS-based statistical landslide susceptibility zonation—with a case study in the Himalayas

An approach for GIS-based statistical landslide susceptibility zonation—with a case study in the Himalayas

Ashis K. Saha;Ravi P. Gupta;Irene Sarkar;Manoj K. Arora;Elmar Csaplovics;Ashis K. Saha;Ravi P. Gupta;Irene Sarkar;Manoj K. Arora;Elmar Csaplovics;
landslides 2005 Vol. 2 pp. 61-69
252
saha2005landslidesan

Abstract

Landslide susceptibility zonation (LSZ) is necessary for disaster management and planning development activities in mountainous regions. A number of methods, viz. landslide distribution, qualitative, statistical and distribution-free analyses have been used for the LSZ studies and they are again briefly reviewed here. In this work, two methods, the Information Value (InfoVal) and the Landslide Nominal Susceptibility Factor (LNSF) methods that are based on bivariate statistical analysis have been applied for LSZ mapping in a part of the Himalayas. Relevant thematic maps representing various factors (e.g., slope, aspect, relative relief, lithology, buffer zones along thrusts, faults and lineaments, drainage density and landcover) that are related to landslide activity, have been generated using remote sensing and GIS techniques. The LSZ derived from the LNSF method, has been compared with that produced from the InfoVal method and the result shows a more realistic LSZ map from the LNSF method which appears to conform to the heterogeneity of the terrain.

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doi:10.1007/s10346-004-0039-8
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