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Abstract
A geophysical survey was carried out at Edo State Development and Property Agency (EDPA)Housing Estate, Benin City to determine the depth to water table at four points within the study area. The Geophysical method used was the Electrical Resistivity Method. The Vertical Electrical Sounding technique was used in the survey with the Schlumberger Array being the electrode setup of choice. Four electrical soundings were carried out with the aid of ABEM SAS 300 terrameter set. The reduction of the acquired data was done with a spreadsheet software. The Interpretation was done using software such as IX1D. 3D field was used to generate subsurface maps.
The results of our interpretation show that in every VES sounding a prolific aquifer was located at relatively shallow depths. The depth to groundwater values from VES 1, 2, 3, and 4 show us a depth to water table of 87, 107, 85, and 93 metres respectively. The groundwater flow direction was also determined and the groundwater is considered to be safe as the depth to groundwater is high enough to be out of contact with underground sewage storages and also, the clay beds above the aquifers serve as filtering medium for infiltrating groundwater and escaping sewage.
The results of our interpretation show that in every VES sounding a prolific aquifer was located at relatively shallow depths. The depth to groundwater values from VES 1, 2, 3, and 4 show us a depth to water table of 87, 107, 85, and 93 metres respectively. The groundwater flow direction was also determined and the groundwater is considered to be safe as the depth to groundwater is high enough to be out of contact with underground sewage storages and also, the clay beds above the aquifers serve as filtering medium for infiltrating groundwater and escaping sewage.
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