Title: Determination of hydraulic properties of shallow aquifer from electrical resistivity and pumping test data in Aragba-Okpe Delta State Nigeria
Authors: Merrious Oviri Ofomola
Addresses: Department of Physics, Delta State University, Abraka, Nigeria
Abstract: The hydraulic properties of shallow Coastal Plain Sands, which outline the main aquifer in the Niger Delta, were investigated around Aragba-okpe area of Delta State employing the vertical electrical sounding (VES) and conventional pumping test techniques. The intention was to find out the aquifer transmitting capacity. Fifteen VES stations were occupied to study the subsurface geoelectric properties. Two wells were drilled for pumping test analysis. The results from resistivity and borehole log data from the drilled well showed that the preferred aquifer to source for water is encountered at the fourth layer with resistivity ranging from 1,448 Ωm-4,935 Ωm and a depth which varies from 16.0 m-32.0 m. The pumping test results revealed that the transmissivity, storage coefficient and hydraulic conductivity of the aquifer are 0.3078 m2/min (443.23 m2/day), 0.002824 m/min and 0.01539 m/min (22.16 m/day) respectively with an average maximum aquifer saturated thickness of about 20 m.
Keywords: pumping test; AQTESOLV; storage coefficient; Aragba-okpe; hydraulic characteristics.
International Journal of Hydrology Science and Technology, 2022 Vol.13 No.3, pp.305 - 323
Received: 18 Oct 2019
Accepted: 22 Jul 2020
Published online: 07 Apr 2022 *