Identification of Shallow Fresh Groundwater Potential Zones Using Electrical Resistivity Sounding Along the Coastal Region of Bhuvanagiri Block of Chidambaram Taluk, Cuddalore District, Tamil Nadu

Jeyavel Raja Kumar T., Dushiyanthan C., Karthikeyan K.

Abstract: Fresh groundwater potential zones have been identified using electrical resistivity sounding along the coastal region of Bhuvanagiri block of Chidambaram Taluk, Cuddalore District. Geologically it comprises alluvium on the top, followed by Mio-Pliocene and cretaceous formations (Fig-2). Geomorphologically it is concealed by flood and alluvial plains. The annual rainfall over the district and the region varied from about 1050mm to 1400mm. Seven vertical electrical soundings (VES) were carried out in different locations to understand the subsurface lithology and layer thickness along the coastal region. The resistivity measurements were collected by using SSR-MP-AT-ME model resistivity meter. A maximum of 100m AB/2 spacing is used by employing Schlumberger configuration. The obtained data were analyzed by using IPI 2WIN software. The curve types obtained are K, HQ, QA, KQH and KKH with 4 and 5 layers. A maximum error percentage of 7.5% wass observed in the VES location7. The overall resistivity and layer thickness varied from <1 ohm m to 851 ohm m and <1m to 14.8m respectively. The study reveals that the coastal region is represented with possible presence of freshwater to a depth of 2.5m bgl and less possibility below 20m bgl.

Keywords: Coastal groundwater potential, Electrical resistivity sounding, Freshwater aquifer zones, Subsurface lithology, Coastal hydrogeology

How to Cite?: Jeyavel Raja Kumar T., Dushiyanthan C., Karthikeyan K., "Identification of Shallow Fresh Groundwater Potential Zones Using Electrical Resistivity Sounding Along the Coastal Region of Bhuvanagiri Block of Chidambaram Taluk, Cuddalore District, Tamil Nadu", Volume 14 Issue 12, December 2025, International Journal of Science and Research (IJSR), Pages: 930-933, https://www.ijsr.net/getabstract.php?paperid=SR251211222612, DOI: https://dx.doi.org/10.21275/SR251211222612