Abstract

Sixty six vertical electrical soundings (VES) have been used to evaluate the ground water potential in Nsukka Local Government Area of Enugu State, Nigeria. The project domain lies within longitudes 7°13′00″ - 7°35′30″ and latitudes 6°43′30″ - 7°00′30″ and covers an area of about 480 km² over three main geological formations. The resistivity and thickness of the aquiferous layer at various observation points were determined by the electrical survey. Also zones of high yield potentials were inferred from the resistivity information. Transmissivity values were inferred using the calculated Dar Zarrouk parameters. Results show highly variable thickness of the aquiferous layer in the study area. Aggregate transverse resistance indicates greater depth of the substratum in the southeastern part of the study area, underlain mostly by the Ajali Formation. High values of transmissivity also predominate, thus suggesting thick and prolific aquiferous zone.

Key words: Resistivity, transverse resistance, transmissivity.