Call for Papers : Volume 15, Issue 03, March 2024, Open Access; Impact Factor; Peer Reviewed Journal; Fast Publication

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Hydrogeophysical study of the groundwater potential of achievers university Owo, Southwestern Nigeria

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Hydrogeophysical study of the permanent site of Achievers University Owo was conducted to investigate its groundwater potential and challenges. Vertical electrical sounding method was employed and Schlumberger configuration was adopted. Sixteen points were sounded along five different traverses across the main campus (Figure 1). Five different subsurface lithologic units were established namely; lateritic topsoil, sand, quartzite, weathered/fractured basement and, basement. The curve types range between simple K, H to complex KHA, HKH and KHK. The topsoil, sand and weathered basement materials are characterised with relatively low resistivity values while the quartzite ridge materials are characterized with high resistivity values. The average resistivity and thickness values for the topsoil are 180Ωm and 2m respectively. Sand was encountered in seven locations with average resistivity and thickness values of 102Ωm and 13m respectively. Quartzite was encountered in eleven locations with average resistivity and thickness values of 422Ωm and 8m respectively. Weathered/fractured basement was encountered in fifteen locations with average resistivity and thickness values of 114Ωm and 11m respectively. Basement is relatively deep in the study area, it was encountered in seven locations and the average resistivity and depth values to the top of basement are 4000Ωm, and 22m respectively. Overburden thickness was established in six locations with an average value of 20m. The combination of overburden materials with the fractured basement constitutes aquiferous units within the study area though the sand and weathered basement units are largely responsible for the groundwater potential. The groundwater potential of the area is moderate. The loose/unconsolidated nature of the quartzite unit will pose a challenge during drilling and completion.

Author: 
Ogundana, A. K., Aladejana, J. A. and Talabi A. O.
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