Geophysical Investigation for Groundwater Potetial around Ladoke Akintola University of Technology Campus, Ogbomoso, Southwestern Nigeria

Abstract

Acute shortage of potable water on Ladoke Akintola University of Technology, Ogbomoso, Southwestern Nigeria has become a perennial problem over the years. In view of this, groundwater potential of the campus was investigated using geophysical methods. Ground Magnetic data were acquired at 10 m interval across the road network on the campus using the Proton Precession Magnetometer. Residualization process was carried out on the data using the Oasis Montaj 6.4.2 Software Package. Qualitative interpretation of the residual magnetic intensity map generated was used to categorize the campus into different geomagnetic anomaly zones. Seventy (70) Vertical Electrical Sounding (VES) data were also acquired and quantitatively interpreted. Geoelectric sections and isoresistivity of the weathered basement map of the campus were generated. Three (3) distinct geomagnetic zones which included basement high/ laterite (111 nT to 256 nT), intermediate magnetic intensity (-12 nT to 38 nT) and possibly basement depressions/ weathered basement (-279 nT to -89 nT) were delineated. The geoelectric sections revealed topsoil, laterite, weathered layer (aquifer) and the fresh basement respectively. The resistivities and thicknesses values of the layers were 170 Ωm to 2586 Ωm; 206 Ωm to 417 Ωm; 30 Ωm to 367 Ωm and 365 Ωm to ∞ and 0.3 m to 2.1 m; 3.0 m to 4.5 m and depth to rockhead of 0.3 m to 23.2 m. The groundwater potential of the campus was generally low due to high clay content of the aquifer. Citation: Bayowa OG, Fashola DK, Adegoke AB, Agesin AA, Oyeniyi SA (2018) Geophysical Investigation for Groundwater Potential around Ladoke Akintola University of Technology Campus, Ogbomoso, Southwestern Nigeria. J Earth Sci Clim Change 9: 485. doi: 10.4172/21577617.1000485