Identification of groundwater prospective zones by using remote sensing and geoelectrical methods in Jharia and Raniganj coalfields, Dhanbad district, Jharkhand state |
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| Authors: | Basudeo Rai A Tiwari V S Dubey |
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| Institution: | (1) The Indian Planetary Society, 404 Gorai Herumb Building, L T Road, Borivali(W), Mumbai, India;(2) Geology Department, B N College, Patna, India;(3) Geology Department, Patna University, Patna, India |
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| Abstract: | The Dhanbad district in Jharkhand faces acute water scarcity and is chronically drought-prone. The groundwater resources in
the area have not been fully exploited. The present study was undertaken to evaluate the groundwater prospective zones. Landsat-5
Multi Spectral Scanner (MSS) data of band 2 and band 4 and false colour composite (FCC) of band 2, 3, 4 were interpreted visually
to differentiate different hydromorphogeological units and to delineate the major trends of lineaments. The different geomorphic
features identified are linear ridges, residual hills, and pediplain, buried pediment and dissected pediplain, besides lineaments.
The study shows that the pediplain and buried pediments are promising zones for groundwater prospecting. The occurrence and
movement of groundwater is restricted to the unconsolidated material, weathered and fractured rocks. For the selection of
tube well sites, geoelectrical resistivity investigations have been carried out at the sites, which were found suitable based
on hydrogeomorphological and hydrogeological studies. Twenty-six Vertical Electrical Soundings (VES) have been carried out
by using Schlumberger electrode configuration, which have brought out 3 to 7 layered sub-surface layers. The resistivity of
water-bearing weathered/fractured rocks varies from 120–150 ohm m. The integrated studies have revealed that the blue colour
zones are most promising for groundwater exploration and dug wells may be dug up to depths of 30±5m. |
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| Keywords: | Tectonics remote sensing lineament resistivity geoelectrical methods groundwater |
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