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Geophysical investigation for ground water in Orifite, Anambra State, Nigeria.


O Egwebe
F Dauda

Abstract



Ten (10) vertical electrical soundings (fairly distributed over Orifite and its environs) were conducted using the Schlcumberger array with six points per decade and current electrode spacing of 1-681m. The results of the Interpretation identified a perched aquifer belonging to Ogwashi-Asaba Formation and much closer to the ground surface (32-57m depth with apparent resistivities, 170-5595Ω-m, and thicknesses, 71-146m) as the source of ground water to the borehole. Also, the result showed a second aquifer (the Nanka sand) at depth, 151-239m, and of resistivities, 574-6750 Ω-m.

JONAMP Vol. 11 2007: pp. 379-386

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