Study on the Groundwater Accumulation of Oke-Ogba Area using Groundmagnetic Survey

Abstract

A ground magnetic survey of Oke-Ogba area in Akure part of south western Nigeria was carried out with the aim of establishing dominant hydrogeologic factors responsible for groundwater development of the area. A total of four transverses were established for the groundmagnetic survey, and the results were presented as groundmagnetic profiles of varying magnetic intensities. The  basement topography was obtained from the profiles using half-width method. The interpretation of magnetic intensities of the profiles revealed a network of geological features such as faults, joints and fractures. The high magnetic intensity at the central portion of the constructed magnetic contour map indicates shallow basement. This was corroborated with quantitatively  interpreted result which established overburden thickness to the top of the magnetic basement rock as varied between 3.0 and 21.0m. Groundmagnetic study of Oke-Ogba area has revealed the efficacy of magnetic prospecting technique as a fast reconnaissance tool for identifying geological features and estimation of basement depth. The study has established geological features as more prominent hydrogeologic indicator for groundwater development in the area. @ JASEM

J. Appl. Sci. Environ. Manage. December, 2010, Vol. 14 (4) 25 - 30