naa a22 4500 510755100 CHVBK 20180411083119.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s12594-013-0103-x doi (NATIONALLICENCE)springer-10.1007/s12594-013-0103-x Ground penetrating radar for groundwater exploration in granitic terrains: A case study from Hyderabad [Elektronische Daten] [K. Maheswari, P. Senthil Kumar, D. Mysaiah, K. Ratnamala, M. Sri Hari Rao, T. Seshunarayana] The Ground Penetrating Radar (GPR) is a newly developing geophysical tool for imaging the sub-surface and is potentially useful in groundwater exploration. We test its usefulness in characterizing a groundwater rich lineament near Gajularamaram in the Hyderabad granite terrain, where groundwater is limited to soil, weathering zone and lineaments. The lineament is 2 km long and 50-100 m wide, and oriented in WNW-ESE direction. It is characterized by many closely spaced sub-vertical fractures and faults, majority of which are parallel to the lineament. On either sides of the lineament, sub-horizontal sheet joints are abundant. The lineament is saturated with groundwater that discharge as springs at some places. About 450 m long, 400-100 MHz GPR data (∼5-30 m depth) were acquired along five profiles across the lineament. In the lineament, soil thickness varies from ∼0.5 m to 5 m, and is underlain by weathered granite. In the WNW part, a thick weathering zone (∼15 m) is present and a 10 m wide vertical anomaly zone (lineament) is also present. The presence of shallow reflectors at 1 m depth in the lineament is attributed to the groundwater surface. The GPR images reveal many sub horizontal to gently dipping reflectors, which are interpreted to be the sheet joints. The GPR data clearly reveal the saturated lineament, from which groundwater may migrate laterally to long distance through the sheet joints. We demonstrate the GPR as a rapid geophysical tool that can be used successfully to explore the nearsurface groundwater. Geological Society of India, 2013 Ground Penetrating Radar nationallicence Groundwater Exploration nationallicence Lineament nationallicence Fractures nationallicence Faults nationallicence Hyderabad Granite Terrain nationallicence Maheswari K. CSIR-National Geophysical Research Institute, Uppal Road, 500 606, Hyderabad, India aut Senthil Kumar P. CSIR-National Geophysical Research Institute, Uppal Road, 500 606, Hyderabad, India aut Mysaiah D. CSIR-National Geophysical Research Institute, Uppal Road, 500 606, Hyderabad, India aut Ratnamala K. CSIR-National Geophysical Research Institute, Uppal Road, 500 606, Hyderabad, India aut Sri Hari Rao M. CSIR-National Geophysical Research Institute, Uppal Road, 500 606, Hyderabad, India aut Seshunarayana T. CSIR-National Geophysical Research Institute, Uppal Road, 500 606, Hyderabad, India aut Journal of the Geological Society of India Springer-Verlag 81/6(2013-06-01), 781-790 0016-7622 81:6<781 2013 81 12594 https://doi.org/10.1007/s12594-013-0103-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0103-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Maheswari K. CSIR-National Geophysical Research Institute, Uppal Road, 500 606, Hyderabad, India aut NATIONALLICENCE 700 1- Senthil Kumar P. CSIR-National Geophysical Research Institute, Uppal Road, 500 606, Hyderabad, India aut NATIONALLICENCE 700 1- Mysaiah D. CSIR-National Geophysical Research Institute, Uppal Road, 500 606, Hyderabad, India aut NATIONALLICENCE 700 1- Ratnamala K. CSIR-National Geophysical Research Institute, Uppal Road, 500 606, Hyderabad, India aut NATIONALLICENCE 700 1- Sri Hari Rao M. CSIR-National Geophysical Research Institute, Uppal Road, 500 606, Hyderabad, India aut NATIONALLICENCE 700 1- Seshunarayana T. CSIR-National Geophysical Research Institute, Uppal Road, 500 606, Hyderabad, India aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer-Verlag 81/6(2013-06-01), 781-790 0016-7622 81:6<781 2013 81 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer