India, Aug. 20 -- The Government of India issued the following news release:
Being the nodal agency for landslide studies, Geological Survey of India (GSI) has completed the landslide susceptibility mapping under the National Landslide Susceptibility Mapping (NLSM) programme on 1: 50,000 scale for the entire landslide prone hilly/ mountainous areas of the country including the Himalayan region, the Tertiary Belt of North-eastern India and Western Ghats, spreading over parts of 19 states/ UTs covering an area of about 4.3 lakh sq. km. areas. The landslide susceptibility maps show the total area classified into high, moderate and low zones based on their relative likelihood of susceptibility to landslide initiation, and can be used as a vital geo-information tool for regional land-use planning in landslide prone fragile slopes. GSI also collected information on 91,000 historical landslides using both remote sensing (RS) and field-based source data. A total number of 33,904 landslides are field validated and the database is continuously being updated with the new landslide data collected year-wise as part of post-disaster studies. The landslide susceptibility map and the landslide inventory generated are uploaded in the GSI's National Geoscience Data Repository (NGDR) and Bhukosh map portal for free download by all the stakeholders. This is also available for viewing in GSI's Bhusanket portal as well as Bhooskhalan mobile app.
Building on the NLSM baseline, GSI has upscaled into meso-scale (1:10,000/1:5,000) landslide susceptibility mapping. This initiative focuses on completing 200 critical sectors identified through NLSM and state government consultations by 2028. By the end of field season 2024-25, GSI has completed work on meso scale (1:10,000) in 160 critical sectors/ localities. These high-resolution maps support planning in vulnerable hill regions, allowing for more informed decisions in infrastructure development, even aiding in implementing zoning regulations and ensuring community safety.
In addition, GSI has carried out a number of post-disaster landslide studies as well as detailed site-specific landslide investigations on 1:1000/2000 scale to suggest suitable remedial measures for landslides and unstable slopes. During last five years (2019-2024), GSI has carried out 45 detailed site-specific investigations of the chronic landslides across the country.
The entire landslide prone areas of the country have been categorized based on the landslide susceptibility status. The state-wise details of landslide susceptibility status are provided in the table given below:
Table Omitted (The document can be viewed at https://www.pib.gov.in/PressReleasePage.aspx?PRID=2158420 )
Disclaimer: Curated by HT Syndication.
