seismic hazard analysis along koyna dam area, western maharashtra, india: a contribution of remote sensing and gis
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ID: 147136
2016
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Abstract
The Koyna-Warna area in Maharashtra, Western India, is one of the world’s best examples of reservoir-induced seismicity. The occurrence of earthquakes in the vicinity of Koyna Dam (Shivaji Sagar Lake) started since 1962, soon after the initiation of water impoundment. To understand the tectonics and seismicity of the region, recent Landsat 8 images and Sentinel radar data were evaluated in GIS, as well as SRTM and ASTER Digital Elevation Model data (DEM) and the DEM-derived morphometric maps. Geophysical and climate data were also included in the GIS database. The analysis of satellite data contributed towards understanding the tectonic framework of the Koyna reservoir area by visual lineament analysis. Thus, Landsat 8 and Sentinel radar data brought out the structural pattern and made visible larger fault zones. The detailed lineament analysis detected areas, presumed to have rocks of relatively higher permeability, supporting intrusion and infiltration of surface water. The resulting maps of weighted overlay procedures derived from causal morphometric factors that influence the susceptibility to ground motion revealed areas with higher, medium and lower susceptibility to soil amplification.
| Reference Key |
theilen-willige2016geosciencesseismic
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|---|---|
| Authors | ;Barbara Theilen-Willige;Sainath P. Aher;Praveen B. Gawali;Laxmi B. Venkata |
| Journal | Journal of biochemical and molecular toxicology |
| Year | 2016 |
| DOI |
10.3390/geosciences6020020
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| URL | |
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