Exploring deep potential aquifer in water scarce crystalline rocks

Journal of Earth system science

E Nagaiah1¹  V Ananda Rao1¹  D V Reddy1¹  Subash Chandra1¹  Shakeel Ahmed1¹ 

[1]CSIR – National Geophysical Research Institute, Uppal Road, Hyderabad 500 007, Andhra Pradesh, India.$$

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

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

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.

【 授权许可】

Unknown