INTERNATIONAL JOURNAL OF SCIENTIFIC DEVELOPMENT AND RESEARCH International Peer Reviewed & Refereed Journals, Open Access Journal ISSN Approved Journal No: 2455-2631 | Impact factor: 8.15 | ESTD Year: 2016
open access , Peer-reviewed, and Refereed Journals, Impact factor 8.15
Identifying a good site for groundwater exploration in hard rock terrain is a challenging task. In hard rocks, groundwater occurs in secondary porosity developed due to weathering, fracturing, faulting, etc., which is highly variable within short distance and contributing to near-surface inhomogeneity, , sometimes within few meters and even within the same geological formations. In the Indian context, the situation becomes more precarious due to negligible primary porosity and low permeability of host rocks restricting groundwater storage as well as movement. Further, low rainfall, high evaporation and run-off limit recharge to the groundwater systems. Out of many geophysical methods like Seismic methods, Electromagnetic methods, Magnetic method, Gravity method etc., resistivity method is familiar to identify the ground water potential zones in view of resistivity variations of rocks with presence or absence of water. The 2D Electrical Resistivity Imaging (ERI) survey was conducted in the granitic and basaltic terrain for better understanding of the aquifer layers/groundwater potential zones and the structural differences which are reasons for success and failure of wells situated at few meters distance. The ERI profiles are taken at shankarpally, Shabad, Pargi, kammeta, pudur by using the ABEM terrameter SAS 1000 with three cables, each cable containing 16 electrodes with an interval of 5m. The locations of these Imaging survey are covering the two formations namely granites and basalts. From these profiles it is observed that in both the terrains low yield of wells is either due to highly weathered material of the aquifer or due to basement characteristics. Similarly high yields are either due to contact zone or fractured zone
Keywords:
Groundwater, hard rock, resistivity imaging survey.
Cite Article:
"Success And Failed Stories In Identification Of Groundwater Potential Zones In Hard Rock ", International Journal of Science & Engineering Development Research (www.ijsdr.org), ISSN:2455-2631, Vol.1, Issue 4, page no.46 - 51, April-2016, Available :http://www.ijsdr.org/papers/IJSDR1604009.pdf
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Publication Details:
Published Paper ID: IJSDR1604009
Registration ID:160080
Published In: Volume 1 Issue 4, April-2016
DOI (Digital Object Identifier):
Page No: 46 - 51
Publisher: IJSDR | www.ijsdr.org
ISSN Number: 2455-2631
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