Abstract
Landslide Hazard Zonation (LSH) maps play a key role in landuse planning particularly in landslide prone areas. LSH mapping is globally accepted one for analyzing the area for landslide susceptibility. Different approaches were followed by many researchers in India to prepare landslide hazard zonation mapping depending upon their need and requirement. The Nilgiris district in Western Ghats of India is one of the severe to high landslide hazard prone areas of India. Many agencies have carried out research on LSH mapping for the Nilgiris district with different scales. A systematic study of inventory and zonation was 122carried out in 1980’s by government agencies. However there is no proper updation or documentation on landslides after 1980’s in the district The purpose of this paper is to review the existing landslide-related studies in the district of The Nilgiris and review the district’s existing landslide hazard map with updated information. Landslide hazard maps in The Nilgiris were compiled in the GIS platform from various authenticated sources. Data on landslides from 1824 to 2014 were collected and a spatial database on landslides was created. A detailed inventory was analyzed and used for revision of the district’s landslide hazard impact on the 2009 landslides.. Based on the landslide inventory and densely populated areas and repeated landslides at the same locations, the most landslide hazard areas were identified.
Highlights
Landslide hazard is commonly shown on maps, which display the spatial distribution of hazard classes
Landslide hazard zonation refers to “the division of the land in homogeneous areas or domains and their ranking according to degrees of actual/potential hazard caused by mass movement” (Varnes 1984)
The present paper aims to bring out a document on the past history of landslides in The Nilgiris and revise the landslide hazard zonation impact map of The Nilgiris district, Western Ghats of India
Summary
Landslide hazard is commonly shown on maps, which display the spatial distribution of hazard classes. Landslide hazard zonation refers to “the division of the land in homogeneous areas or domains and their ranking according to degrees of actual/potential hazard caused by mass movement” (Varnes 1984). Scientists are globally working on landslide studies and on LSH studies. India is one among the countries highly prone to landslide hazard. The landslide hazard zonation atlas of India shows that many parts of India are prone to very high to severe landslide hazard (BMTPC 2002). Some of the densely populated hill areas fall under this category. Various methods have been deployed to prepare LSH maps by various researchers along the globe. Researchers have been using various qualitative and quantitative approaches/techniques to derive the hazard
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
