Aquifer zones are identified by the Geophysical Electrical Resistivity Survey method. This
method is useful to delineate the subsurface formations, weathered zone, fracture pattern, etc. An
attempt made to identify the subsurface lithology and aquifer zones by geoelectrical resistivity
method in part of Mangalur block, Cuddalore District, Tamil Nadu, S.India. The study area
consist of charnockite and charnockitic gneiss rocks. Electrical soundings have been conducted
at every 2 Km intervals in grid pattern. Totally 36 VES were conducted, which have been
qualitatively and quantitatively interpreted using software packages. Pseudosections have been
generated by IPI 2 WIN ver.3.1 and isoresistivity maps were prepared. Geoelectrical parameter
and sections have been prepared based on quantitative interpretation. Considering the
hydrometeorological and hydrogeological conditions the VES interpretation was done. From the
interpretation result the VES no. 21 (Alambadi) is a prospective zone for groundwater target.
