Geophysical Investigation of Ground-Water in Agbor Area of Delta State, Nigeria

Abstract

Geophysical survey was curried out in order to investigate Groundwater existence in Agbor Area of Delta State Nigeria. This research work became necessary in order to solve the acute water shortage in the area by way of prospecting or searching for additional aquifer which would subsidize the existing one, domestically, industrially and agriculturally. Ten(10) vertical electrical sounding (VES) (uniformly distributed) was conducted in Agbor area and its environs using schlumberger electrode array. The VES were carried out with semi electrode spacing in the range Im-928m at six (06) points per decade. The results of the interpretation identified wet sand/clean sand as perched aquifer which can produce ground water to the bore-hole at a perceptible rate between depth of 90m to 140m as confirmed by a nearby driller logs of Agbor [21]. The resistivity of the aquifer detected varied from 102.4 ohm-m to 100,000 ohm-m while the thickness ranges from 31.9m to 103.7m.