Shallow Aquifer in Isihor Village of Edo State, Nigeria

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Author(s) Ezomo, F. O. | Aiyohuyin, E. O
Pages 415-420
Volume 1
Issue 8
Date August, 2012
Keywords Existence, geophysical, vertical electrical sounding (VES), Isihor village, pure water.
Abstract

The need to prospect for shallow aquifer (water bearing formations) that will never dry up for a long time became inevitable because of acute water shortage engulfing the inhabitants of the area thus making life unbearable and hence creating economic hardship for the citizen of the area. The existence of shallow aquifer in Isihor Village of Edo State, Nigeria was determined geophysically by the vertical electrical sounding (VES) of electrical resistivity method. This study revealed that Isihor Village is one of the most auriferous region in Edo State of Nigeria because the first four to five sub lithological layers consist of aquifer as further confirmed by nearby borehole log/driller log lithology of the area. The existence of shallow aquifer in Isihor Village means that pure water industry can be sited in the area for portable water production because the aquifer will not dry up for a long time. This will however assist the community to solve unemployment problems. Ten VES, fairly distributed in the area was carried out using Schlumberger array techniques based on six (06) points per decay operation to justify the study. The geophysical results were used to determine the depth, thickness and resistivity of the recommended shallow unconfined aquifer. The shallow aquifer which is mainly sand and laterite in nature occur at a depth of about 53m below sea level. Its thickness varied from 0.5m to 27.0m while its resistivity varied from 1000hm-m to 6000 ohm-m. Area of probable shallow thick aquifer have been identified for future drilling operation.

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