International Journal of Current Research and Academic Review
Int.J.Curr.Res.Aca.Rev. 2014.2(1): 58-75
Delineation of Groundwater Potential Zones Using Geophysical and GIS Techniques in the Sarabanga Sub Basin, Cauvery River, Tamil Nadu, India
S.Venkateswaran1* , M.Vijay Prabhu2 and S.Karuppannan
Department of Geology, Periyar University, Palkalai Nagar, Salem-11, Tamil Nadu, India
Water plays a vital role in the development of agricultural activities in the study area. The surface water resources are inadequate to fulfill the water demand. Productivity through groundwater is quite high as compared to surface water, but groundwater resources have not yet been properly exploited. Keeping this view, the present study to delineate various groundwater potential zones for the assessment of groundwater availability in the Sarabanga Sub-basin, Cauvery River and Tamil Nadu. 93 Schlumberger Vertical Electrical Sounding (VES) survey were carried out in the study area. The field data were interpreted by IPI2WIN software to determine the resistivity and thickness of the different layers. Results of geophysical data were used to prepare spatial distribution map using GIS. Integration analysis was carried with thickness of first and second layer fracture zone with the corresponding resistivity maps. This map was superposed over geology map. The suitable potential zones for groundwater were delineated from first layers combinations of low resistivity with more thickness in areas occupied by hornblende-biotite-gneisses and Charnockite. The depth for the construction of tube-wells and dug-wells were suggested. The spatial distribution variations in different resistivity layer results are given in the findings
Groundwater; Sarabanga; Geophysical data; GIS; Potential Zones.