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      https://www.ias.ac.in/article/fulltext/jess/121/06/1455-1468

    • Keywords

       

      Geophysics; collinear and transverse pole–pole array; groundwater resources; deep potential aquifer; fracture zone; granite.

    • Abstract

       

      Characterization of the shear zone with pole–pole electrical resistivity tomography (ERT) was carried out to explore deep groundwater potential zone in a water scarce granitic area. As existing field conditions does not always allow to plant the remote electrodes at sufficiently far of distance, the effect of insufficient distance of remote electrodes on apparent resistivity measurement was studied and shown that the transverse pole–pole array affects less compared to the collinear pole–pole array. Correction factor have been computed for transverse pole–pole array for various positions of the remote electrodes. The above results helped in exploring deep aquifer site, where a 270 m deep well was drilled. Temporal hydro-chemical samples collected during the pumping indicated the hydraulic connectivity between the demarcated groundwater potential fractures. Incorporating all the information derived from different investigations, a subsurface model was synthetically simulated and generated 2D electrical resistivity response for different arrays and compared with the field responses to further validate the geoelectrical response of deep aquifer set-up associated with lineament.

    • Author Affiliations

       

      Subash Chandra1 E Nagaiah1 D V Reddy1 V Ananda Rao1 Shakeel Ahmed1

      1. CSIR – National Geophysical Research Institute, Uppal Road, Hyderabad 500 007, Andhra Pradesh, India.
    • Dates

       
  • Journal of Earth System Science | News

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