Landslide hazard zonation in the Garhwal Himalaya. A terrain evaluation approach

1991 ◽  
Vol 28 (2-3) ◽  
pp. A162
Keyword(s):  
Landslide Hazard ◽  
Garhwal Himalaya ◽  
Hazard Zonation ◽  
Landslide Hazard Zonation ◽  
Evaluation Approach

Landslide Hazard Zonation: A Case Study in Garhwal Himalaya, India

1995 ◽  
Vol 15 (4) ◽  
pp. 301 ◽  
Author(s):  
S. Sarkar ◽  
D. P. Kanungo ◽  
G. S. Mehrotra
Keyword(s):  
Landslide Hazard ◽  
Garhwal Himalaya ◽  
Hazard Zonation ◽  
Landslide Hazard Zonation

scholarly journals Landslide hazard zonation mapping of Tapovan - Helong hydropower project area, Garhwal Himalaya, India, using univariate statistical analysis

2009 ◽  
Vol 39 ◽  
pp. 59-76
Author(s):  
Ajay K. Naithani ◽  
P. C. Nawani
Keyword(s):  
Statistical Analysis ◽  
Landslide Hazard ◽  
Garhwal Himalaya ◽  
Hazard Evaluation ◽  
Hazard Zonation ◽  
Landslide Hazard Zonation ◽  
Main Central Thrust ◽  
Geological Conditions ◽  
Slope Structure ◽  
Rating Scheme

Landslide hazard zonation mapping of Tapovan - Helong area of Garhwal Himalaya, where a hydropower scheme of 520 MW is proposed on Dhauli Ganga was carried out. The study area lies in the Main Central Thrust (MCT) zone, which receives majority of the southwest summer Monsoon. The study area belongs to Central Crystalline zone consisting of medium to high grade-quartz-plagioclase-muscovite-biotite-garnet-kyanite and sillimanite bearing crystalline rocks. In the present study statistical analysis of various geo-environmental factors such as the lithology, slope, structure, relative relief, landuse and hydro-geological conditions were used. For preparing the landslide hazard zonation map a quantitative approach called landslide hazard evaluation factors (LHEF) rating has been used. The study indicates that structures, peri-glacial material resting on steeper angle of hill slopes and rainfall plays major role in triggering landslides in this part of the Himalaya. The main aim of this study was to select the best locations for the construction of barrage and sedimentation tank, selections of sites for the tunnels portal and the switchyard area and finally appropriate slope stabilization measures were also suggested. The study further suggests that in the investigation stage for river valley projects, landslide hazard evaluation factor (LHEF) rating scheme can provide rapid hazard assessment in a mountainous terrain.

scholarly journals Landslide hazard zonation of Dharasu -Tehri-Ghansali area of Garhwal Himalaya, India using remote sensing and GIS techniques

2003 ◽  
Vol 28 ◽  
Author(s):  
Varun Joshi ◽  
T. V. R. Murthy ◽  
A. S. Arya ◽  
A. Narayana ◽  
A. K. Naithani ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Agricultural Land ◽  
Environmental Parameters ◽  
Landslide Hazard ◽  
Garhwal Himalaya ◽  
Geographical Information ◽  
Hazard Zonation ◽  
Landslide Hazard Zonation ◽  
Statistical Parameters ◽  
Reservoir Rim

The landslide hazard zonation of Dharasu-Tehri -Ghansali area of Garhwal Himalaya has been carried out using Indian Remote Sensing (IRS) LISS II and SPOT (MLA) data for various geo-environmental parameters viz. lithology, structure, land use/land cover, slope and drainage. The forest types and density and other land uses in the reservoir rim area were delineated and also assessed the direct loss of forests, agricultural land, wastelands and other landuse in the submergence area of the Tehri dam. There are 71 landslides in the periphery of the Bhagirathi and the Bhilangana rivers, which will enclose the impounded reservoir. Out of 71 landslides 35 will get submerged during the reservoir-filling phase while remaining will continue to exist. By overlaying the thematic maps in Geographical Information System (GIS) environment and using statistical parameters, a landslide hazard zonation map has been prepared. Phyllite, dissected hills, slope 50°-60°, agriculture and convex side of stream channel were to be found more susceptible for landslide. An area of 43.5 km2 in the reservoir rim falls in the category of high to very high class as per the landslide hazard zone code.

scholarly journals LANDSLIDE HAZARD ZONATION MAPPING OF CHAMOLI LANDSLIDES IN REMOTE SENSING AND GIS ENVIRONMENT

2018 ◽  
Vol XLII-5 ◽  
pp. 475-480
Author(s):  
M. K. Tripathi ◽  
H. Govil ◽  
P. K. Champati ray ◽  
I. C. Das
Keyword(s):  
Remote Sensing ◽  
Remote Sensing And Gis ◽  
Landslide Hazard ◽  
Information Value ◽  
Slope Aspect ◽  
Hazard Zonation ◽  
Landslide Hazard Zonation ◽  
Thematic Layers ◽  
Zonation Map ◽  
Gis Environment

<p><strong>Abstract.</strong> Landslides are very common problem in hilly terrain. Chamoli region of Himalaya is highest sensitive zone of the landslide hazards. The purpose of Chamoli landslide study, to observe the important terrain factors and parameters responsible for landslide initiation. Lithological, geomorphological, slope, aspect, landslide, drainage density and lineament density map generated in remote sensing and GIS environment. Data information of related geological terrain obtain through topographic maps, remote sensing images, field visits and geological maps. Geodatabases of all thematic layers prepared through digitization of topographic map and satellite imageries (LISS-III, LISS-IV &amp;amp; ASTER DEM). Integrated all thematic layers applying information value method under GIS environment to map the zonation of landslide hazard zonation map validation and verification completed by field visit. The landslide hazard zonation map classified in four classes very high, high, medium and low.</p>

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