Browsing by Author "Warith A. Adebisi"

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    Assessment of Groundwater Potential and Aquifer Vulnerability at the University of Ilorin Teaching Hospital, Using Vertical Electrical Sounding Technique
    (Centrepoint Journal, 2026) Hussain O. Abubakar; Warith A. Adebisi; Ismail O. Folorunso; Taiye O. Adeoye; S. Olatunji
    Groundwater is critical for sustaining healthcare operations at the University of Ilorin Teaching Hospital (UITH), supporting patient care and hygiene. However, urbanization, pollution, and climate change threaten its quality and sustainability. This study evaluates groundwater potential and aquifer vulnerability at UITH, employing Vertical Electrical Sounding (VES) to assess subsurface resistivity and groundwater potential. Using a Schlumberger electrode configuration, data were collected at 12 locations near failed boreholesin order to validate layer thicknesses and depths. The VES results identified three to four geo-electric layers, including topsoil, weathered basement, fractured basement, and fresh basement. The aquifer vulnerability index (AVI) was applied to classify and distinguish aquifer vulnerability within the study area.The aquifer resistivity ranges from 27.9 Ωm to 522 Ωm, thickness ranges from 3.04 m to 67.6 m, and the depth ranges from 3.57 m and 71.6 m. The curve types including H, A, HK, and HA reflect lithological diversity and varying aquifer conditions.The weathered and fractured basement layers exhibited significant groundwater potential, particularly at VES5 and VES6, which showed high transmissivity values of 308.88 m²/day and 254.93 m²/day respectively. Moderate potential was observed at VES1, VES2, VES9, and VES10, while VES3, VES4, VES8, and VES12 showed lower potential due to thin weathered layers.Aquifer vulnerability varied across sites, with VES6 and VES12 demonstrating strong protection from contamination due to thick overburden, while VES4 and VES3 were highly susceptible. The study highlights the need for protective measures in vulnerable areas and sustainable groundwater management to ensure a reliable water supply for healthcare operations.