Universal Journal of Geoscience Vol. 1(2), pp. 37 - 45
DOI: 10.13189/ujg.2013.010201
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Evaluation of Groundwater Potential of Baikin Ondo State Nigeria Using Resistivity and Magnetic Techniques: A Case Study


A. A. Adepelumi*, O. B. Akinmade, Fayemi. O
Department of Geology, Obafemi Awolowo University, Ile−Ife, Nigeria

ABSTRACT

A combined electrical resistivity and Magnetic surveys was carried out to locate fissured zones and associated groundwater-bearing media at Baikin Area in Ondo State, Nigeria that is known to have acute groundwater supply shortage. One Hundred (100) Vertical Electrical Soundings were acquired along ten traverses using the Schlumberger array with maximum half current electrode spacing (AB/2) of 200 m. Magnetic data were acquired along the traverses at station interval of 10 m using the Proton Precession Magnetometer. Four geologic layers were delineated. These include the topsoil, weathered layer, fractured basement and fresh basement bedrock. The thickness of the topsoil ranged from 0.2 to 1.1 m while the resistivity values varied from 29 to 455 Ωm. The weathered layer thickness varied between 0.2 and 12.6 m while its resistivity ranged between 13 and 307 Ωm. The fractured basement delineated had resistivity value of 61 Ωm. The fresh basement resistivity ranged between 941 and α Ωm. The overburden thickness ranged between 1.1 and 12.9 m. The weathered and fractured aquifers constituted the main aquifer units. Aquifer thickness varied between 0.2 and 12.6 m. Quasi 3D magnetic models also showed that depth to bedrock in the study area was shallow. The study concluded that the groundwater potential of Baikin Area was generally low.

KEYWORDS
Resistivity, Schlumberger, Groundwater, Aquifer, Fracture

Cite this paper
A. A. Adepelumi , O. B. Akinmade , Fayemi. O . "Evaluation of Groundwater Potential of Baikin Ondo State Nigeria Using Resistivity and Magnetic Techniques: A Case Study." Universal Journal of Geoscience 1.2 (2013) 37 - 45. doi: 10.13189/ujg.2013.010201.