• Saranya.S
• Munikrishna. L
• Dr. H.C. Vajrappa

This study employs electrical resistivity techniques to investigate groundwater potential zones in a challenging rock terrain. 52 Vertical Electrical Soundings (VES) were conducted using the Schlumberger array. The resistivity data were interpreted using standard curve matching and inversion techniques. Isoresistivity maps at various depths (AB/2 = 45 m, 90 m, 180 m, and 360 m) were generated to delineate subsurface lithology and aquifer zones. Results show that weathered and semi-weathered zones with moderate resistivity values (50–250 Ωm) favor groundwater occurrence. The study further assesses bedrock depth and longitudinal conductance to evaluate aquifer protection and transmissivity. Integrating resistivity profiles with lithological and yield data confirms the method's effectiveness in groundwater exploration in crystalline terrains.

Groundwater exploration, Electrical resistivity, VES, Isoresistivity maps, Hard rock aquifers, Longitudinal conductance

"GEOPHYSICAL ASSESSMENT OF GROUNDWATER POTENTIAL IN HARD ROCK TERRAIN OF MARKANDAHALLA, KOLAR (KARNATAKA) USING REMOTE SENSING AND GIS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.589-598, March-2019, Available :http://www.jetir.org/papers/JETIR1903P75.pdf

"GEOPHYSICAL ASSESSMENT OF GROUNDWATER POTENTIAL IN HARD ROCK TERRAIN OF MARKANDAHALLA, KOLAR (KARNATAKA) USING REMOTE SENSING AND GIS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp589-598, March-2019, Available at : http://www.jetir.org/papers/JETIR1903P75.pdf