Geoelectrical Characterization of Coastal Aquifers in Agbado-Ijaye, Lagos, Southwestern Nigeria; Implications for Groundwater Resources Sustainability

Kehinde D. Oyeyemi (), Joyce Abuka-Joshua, Oluwatosin J. Rotimi, Bastien Dieppois, Modreck Gomo, Abayomi A. Olaojo, Philips O. Falae and Mohamed Metwaly
Additional contact information
Kehinde D. Oyeyemi: Applied Geophysics Programme, Department of Physics, Covenant University, Ota 112211, Nigeria
Joyce Abuka-Joshua: Applied Geophysics Programme, Department of Physics, Covenant University, Ota 112211, Nigeria
Oluwatosin J. Rotimi: Department of Petroleum Engineering, Covenant University, Ota 112211, Nigeria
Bastien Dieppois: Center for Agroecology, Water and Resilience, Coventry University, Coventry CV1 2TU, UK
Modreck Gomo: Faculty of Natural and Agricultural Sciences, Institute for Groundwater Studies, University of the Free State, Bloemfontein 9301, South Africa
Abayomi A. Olaojo: Department of Earth Sciences, Ajayi Crowther University, Oke-Ebo 211271, Oyo, Nigeria
Philips O. Falae: Department of Geology, Afe Babalola University, Ado-Ekiti 360101, Nigeria
Mohamed Metwaly: Department of Archaeology, College of Tourism and Archaeology, King Saud University, Riyadh 11421, Saudi Arabia

Sustainability, 2023, vol. 15, issue 4, 1-22

Abstract: Water is a natural resource; its availability depends on climatic and geological conditions, and it is invariably controlled by human activities. Agbado-Ijaye lies within a coastal area, where local communities have been facing incessant water shortages, especially during the dry season. This study investigated the groundwater-bearing geological unit(s) using hydrogeophysical techniques in the coastal environment. The electrical resistivity technique, involving vertical electrical sounding (VES) and two-dimensional (2D) electrical resistivity imaging via Wenner array electrode configuration, was used to characterize the geoelectric distribution. Twenty VES stations were investigated and current electrodes (AB/2 m) spacing expanded from 1–200 m; four 2D electrical resistivity imaging traverses having a length of 200 m each and interelectrode spacing of 10 m (level 1) to 60 m (level 6) was adopted. Four geoelectric units were delineated, namely: topsoil (15–251 Ωm), clayey (28–100 Ωm), clayey sand (125–190 Ωm) and sandy (205–876 Ωm) with thicknesses ranging from 0.7–1.3 m, 4.1–19.0 m, 2.6–15.6 m and undefined depth, respectively. The 2D imaging sections also detected similar geoelectric layers, corroborating the VES-derived sections. The inverted sections delineated two different aquifers: the shallower low-yield aquifer comprising sandy clay/clayey sand units with a maximum depth of about 5.5 m. This layer is adjudged to be the continental plain sand of the Benin Formation. The deeper high-yield aquifer with a maximum depth of 30.4 m is a beach sand unit that belongs to the Tertiary Alluvium of the Dahomey Basin. The study showed that hydrogeophysical investigation is vital in exploring, developing, and managing coastal groundwater resources.

Keywords: geoelectrical resistivity surveys; groundwater resources; coastal aquifer; Lagos; Nigeria (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/4/3538/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/4/3538/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:4:p:3538-:d:1068680

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().