Vol. 10(1), pp. 1-8, 2021
ISSN: 2276-7835
Copyright ©2021, the copyright of this article is retained by the author(s)
https://gjournals.org/GJSETR
Aquifer Delineation using Electrical Resistivity Method, a Case Study of Opolo Community in Yenagoa Local Government Area of Bayelsa State; Nigeria
Department of Geology, Niger Delta University, Wilberforce Island, Amassoma, Bayelsa State
Article No.: 032221026
Type: Research
Nine vertical electrical soundings (VES) were carried out in Opolo community in Yenagoa local government area of Bayelsa State, the aim is to delineate aquifer in the area for the drilling of productive wells, using Abem Terrameter, SAS 1000. The interpreted geo-electric sections from the VES data and computer modeling curves revealed five (5) geo-electric layers. The first geo-electric layer has a resistivity value of 31Ωm with a thickness of 2.2m and a depth of 2.2m. This layer is interpreted as topsoil. The second geo-electric layer has a resistivity value of 33.87Ωm with a thickness of 1.6m and a depth of 4.0m. This layer is interpreted as clay. The third geo-electric layer has a resistivity value of 44.33Ωm with a thickness of 12.02m and a depth of 15m. This layer is interpreted as silty clay. The fourth geo-electric layer has a resistivity value of 684.2Ωm with a thickness of 16m and a depth of 17m. This layer is interpreted as fine to medium coarse sand and is aquiferous. The fifth layer has a resistivity value of 1442Ωm with a depth of 11.86m and a thickness of 7m. This layer is interpreted as coarse sand and is aquiferous. The third and the fourth layers with high resistivity values should be considered for drilling. The geo electric sections were compared with strata log of a nearby borehole in Opolo Community and these were correlatable. From this study, a benchmark of 26m depth has been recommended to represent subsurface horizon saturated with freshwater in the study area.
Accepted: 25/03/2021
Published: 18/05/2021
*Corresponding Author
Ovuru Cyril
E-mail: Cebimtakuu@ gmail.com
Keywords:
Resistivity; Depth; Aquifer; Delineation.
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Journal Name : citation_journal : Greener Journal of Science, Engineering and Technological Research
Publication Status/Date : usp_status_date : 18/05/2021
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