Geoelectrical Schlumberger Investigation for Characterizing the Hydrogeological Conditions Using GIS in Kadavanar Sub-basin, Cauvery River, Tamil Nadu, India
S .Venkateswaran1, P. Jayapal2

1S.Venkateswaran, Department of Geology, Periyar University, Salem (Tamil Nadu), India.
2P.Jayapal, Department of Geology, Periyar University, Salem (Tamil Nadu), India.
Manuscript received on 10 July 2013 | Revised Manuscript received on 18 July 2013 | Manuscript Published on 30 July 2013 | PP: 196-202 | Volume-3 Issue-2, July 2013 | Retrieval Number: B1046073213/13©BEIESP
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Abstract: The increasing demand for fresh water has necessitated the exploration for new sources of groundwater, particularly in hard rock terrain, where groundwater is a vital source of fresh water. A fast, cost effective and economical way of exploration is to study and analyze geophysical resistivity survey data. The present study area Kadavanar sub-basin, Cauvery River, Tamil Nadu, India, is overlain by Archaean crystalline metamorphic complex. The study area is a characteristic region of unconfined aquifer system. The potential for occurrence of groundwater in the study areas was classified as very good, good, moderate and poor by interpreting the subsurface geophysical investigations, namely vertical electrical soundings, were carried out to delineate potential water bearing zones. The studies reveal that the groundwater potential of shallow aquifers is due to weathered zone very low resistivity and very high thickness and the potential of deeper aquifers is determined by fracture zone very low resistivity and very high thickness area. By using conventional GIS method, the spatial distribution maps for different layer (Top soil, weathered zone, first fracture zone and second fracture zone) thicknesses were prepared. The geoelectrical approach was successfully applied in the study area and can be therefore easily adopted for similar environments.
Keywords: Aquifer, Vertical Electrical Sounding (VES), Spatial Distribution Map, Hard Rock Terrain.

Scope of the Article: Remote Sensing, GIS and GPS