Population based binary reclassification of Indian

Authors: Thrideep Kumar N Jagadish Nandan Hindayar Murali Mohan P Dasarwar Mohd Ibrahim S K Som

Publish Date: 2017/03/11

Volume: 89, Issue: 2, Pages: 175-182

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Abstract

GIS complemented statistical classification techniques yield good result in predicting landslide hazards Indian standard landslide hazard model follows guidelines formulated by the Bureau of Indian Standards BIS 1998 in which the study area is divided into five categories ranging from very low hazard zone to very high hazard zone on fixed numerical ratings For land use planners “moderate hazard zone” proves vague and indecisive In the present study BIS based landslide hazard zones are demarcated for 140 sq km area for a road corridor in East and North Sikkim that shows 2196 5314 2280 and 210 for ‘Low Hazard Zone’ ‘Moderate Hazard Zone’ ‘High Hazard Zone’ and ‘Very High Hazard Zone’ respectively This classification scheme has been reclassified to binary system based on population distribution and defining the cutoff by evaluation techniques of the ROC The reclassification eliminates “moderate hazard zone” minimizing the TypeII error and becomes more acceptable for future land use planning

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