Evaluation of Groundwater Hydraulic Characteristics Using Electrical Sounding Data: A case study of University of Ilorin, Ilorin, Nigeria
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Date
2020-03-19
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Publisher
Faculty of Physical Sciences, Chukwuemeka Odumegwu Ojukwu University, Anambra State, Nigeria.
Abstract
Adequate knowledge of groundwater is important considering the present high rate of
groundwater demand for domestic, agriculture and industrial purposes. Ilorin where the
study area is located depend mainly on groundwater for both domestic and industrial
purposes. Given this scenario, there is need to consider further ways of exploring
groundwater to improve urban water supply. This study was carried out in University of
Ilorin, Northcentral Nigeria. The groundwater aquifer characteristics of the study area was
established using electrical resistivity method to evaluate groundwater yields and potentials.
Fifteen (15) vertical electrical sounding (VES) points were acquired within the study area.
The interpretation of the vertical electrical sounding (VES) data revealed the presence of
three to four geo-electric layers which include top soil, lateritic layer, weathered / fractured
basement and fresh basement. The aquiferous layer is weathered / fractured basement having
resistivity between 35.6 Ωm – 687.3 Ωm and thickness between 3.13m – 42.71m. The calculated
hydraulic conductivity, K values for the study area ranges from 0.63m/day to 21.77m/day and
transmissivity, T values ranges from 2.041 m2/day to 800.83 m2/day. The hydraulic
conductivity, K of the centre portion of the investigated area varies between 8.77m/day to
21.77m/day which shows good yields and potential zones.
Description
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Keywords
Aquifer characteristics, electrical resistivity, geoelectric sections, hydraulic conductivity and transmissivity.
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