IJEP 42(4): 498-505 : Vol. 42 Issue. 4 (April 2022)
Saurabh Singh and Arun Kumar Mishra*
M.M.M. University of Technology, Department of Civil Engineering, Gorakhpur- 273 010, Uttar Pradesh, India
Abstract
Landslides are one of the major natural hazards that accounts for hundreds of lives, damaging properties and blocking connection links every year. It is a very common phenomenon in the Himalayas. The area chosen in the present work is the Bhimtal region of Nainital district, Uttarakhand having a 22.6 km2 area. Bhimtal township located in the Kumaun Lesser Himalaya is known to be vulnerable to landslides in the past. Kumaun Lesser Himalaya is lying between Nepal and Himachal Pradesh borders. It is considered one of the most fascinating segments of the Himalayas and has unique geological settings. Bhimtal town is situated at an altitude of 1370 m above mean sea level. It is located between 29°18‘N and 29°28‘N latitudes and 79°32‘E and 79°37‘E longitudes. It is fast becoming a tourist region where lots of hotels and resorts are coming up consuming the already depleting land. The main road that passes through the study area has been affected by landslides before. The main aim of this research work is to create a landslide hazard zonation (LHZ) map based on total estimated hazard (TEHD) which is calculated for each facet based on factor ratings and to analyze the stability of roadside hill slopes using geotechnical investigation, so it can be used for effective and efficient disaster management. ArcGIS 10.3, Google Earth Pro 7.3.2, Excel software have been used for creating factor maps, exporting features and calculating total estimated hazard (TEHD), respectively. The study also includes the primary investigation of the site, collection of soil samples, testing of samples, analysis of test results and conducting slope stability analysis. The slope stability analysis is supplemented by using a numerical equations based on soil parameters. Soil samples were collected and were tested for water content, sieve analysis, hydrometer analysis, Atterberg‘s limit, specific gravity and unconfined compressive strength (UCS) by following the Indian Standard method for soil test procedures.
Keywords
India, Bhimtal, Landslides, Factor maps, Ratings, Total estimated hazard, Landslide hazard zonation, Geotech-nical investigation, Roadside hill slope stability
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