Towards understanding the extent of saltwater incursion into the coastal aquifers of Akwa Ibom State, Southern Nigeria using 2D ERT
The hydro-lithostratigraphic units of the coastal area of Akwa Ibom State, Southern Nigeria were investigated involving electrical resistivity tomography (ERT) and Wenner array. This procedure and electrode configuration were adopted because of their wide range of sensitivity and inherent characteri...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Journal of King Saud University: Science |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1018364722005523 |
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| author | Stephen E. Ekwok Ubong C. Ben Ahmed M. Eldosouky Saleh Qaysi kamal Abdelrahman Anthony E. Akpan Peter Andráš |
| author_facet | Stephen E. Ekwok Ubong C. Ben Ahmed M. Eldosouky Saleh Qaysi kamal Abdelrahman Anthony E. Akpan Peter Andráš |
| author_sort | Stephen E. Ekwok |
| collection | DOAJ |
| description | The hydro-lithostratigraphic units of the coastal area of Akwa Ibom State, Southern Nigeria were investigated involving electrical resistivity tomography (ERT) and Wenner array. This procedure and electrode configuration were adopted because of their wide range of sensitivity and inherent characteristics to geological materials. This study is aimed at defining the extent of saltwater invasions into the coastal and inland aquifers. The investigated area is divided into three zones A (≤0 < 20 km), B (<20 < 40 km), and C (>40 km)) based on the distance from the survey locations to the shoreline. The saline aquifer of the control tomogram obtained at the shoreline (Ibeno Beach) is characterized by the electrical resistivity of 0.159–3.55 Ωm. Within Zone A, (Ukpenekang, Eastern Obolo, and Okoro Ette), the saline aquifer is defined by electrical resistivity values of 0.33–44.0 Ωm, 2.07–48.5 Ωm, and 8.0–60.0 Ωm respectively. In general, the Zone B saline aquifers are defined by electrical resistivity values of 0.602–64.5 Ωm. Furthermore, the third zone which is situated a distance >40 km from the shoreline, is described by relatively higher electrical resistivity values (38.9–3260 Ωm) and indicates a region free from saltwater incursions. Generally, the 2D ERT models showed that electrically resistivity values increase progressively inland. |
| first_indexed | 2024-04-13T14:31:14Z |
| format | Article |
| id | doaj.art-f3fcacd70bb945f4a850899fb5c9c992 |
| institution | Directory Open Access Journal |
| issn | 1018-3647 |
| language | English |
| last_indexed | 2024-04-13T14:31:14Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of King Saud University: Science |
| spelling | doaj.art-f3fcacd70bb945f4a850899fb5c9c9922022-12-22T02:43:12ZengElsevierJournal of King Saud University: Science1018-36472022-11-01348102371Towards understanding the extent of saltwater incursion into the coastal aquifers of Akwa Ibom State, Southern Nigeria using 2D ERTStephen E. Ekwok0Ubong C. Ben1Ahmed M. Eldosouky2Saleh Qaysi3kamal Abdelrahman4Anthony E. Akpan5Peter Andráš6Applied Geophysics Programme, Department of Physics, University of Calabar, PMB 1115, Calabar, Cross River State, NigeriaApplied Geophysics Programme, Department of Physics, University of Calabar, PMB 1115, Calabar, Cross River State, NigeriaDepartment of Geology, Suez University, Suez 43518, Egypt; Corresponding author.Department of Geology & Geophysics, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi ArabiaDepartment of Geology & Geophysics, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi ArabiaApplied Geophysics Programme, Department of Physics, University of Calabar, PMB 1115, Calabar, Cross River State, NigeriaFaculty of Natural Sciences, Matej Bel University in Banska Bystrica, Tajovského 40, 974 01 Banska Bystrica, SlovakiaThe hydro-lithostratigraphic units of the coastal area of Akwa Ibom State, Southern Nigeria were investigated involving electrical resistivity tomography (ERT) and Wenner array. This procedure and electrode configuration were adopted because of their wide range of sensitivity and inherent characteristics to geological materials. This study is aimed at defining the extent of saltwater invasions into the coastal and inland aquifers. The investigated area is divided into three zones A (≤0 < 20 km), B (<20 < 40 km), and C (>40 km)) based on the distance from the survey locations to the shoreline. The saline aquifer of the control tomogram obtained at the shoreline (Ibeno Beach) is characterized by the electrical resistivity of 0.159–3.55 Ωm. Within Zone A, (Ukpenekang, Eastern Obolo, and Okoro Ette), the saline aquifer is defined by electrical resistivity values of 0.33–44.0 Ωm, 2.07–48.5 Ωm, and 8.0–60.0 Ωm respectively. In general, the Zone B saline aquifers are defined by electrical resistivity values of 0.602–64.5 Ωm. Furthermore, the third zone which is situated a distance >40 km from the shoreline, is described by relatively higher electrical resistivity values (38.9–3260 Ωm) and indicates a region free from saltwater incursions. Generally, the 2D ERT models showed that electrically resistivity values increase progressively inland.http://www.sciencedirect.com/science/article/pii/S10183647220055232D ERTWenner arrayAquiferSaltwaterCoastal areaSouthern Nigeria |
| spellingShingle | Stephen E. Ekwok Ubong C. Ben Ahmed M. Eldosouky Saleh Qaysi kamal Abdelrahman Anthony E. Akpan Peter Andráš Towards understanding the extent of saltwater incursion into the coastal aquifers of Akwa Ibom State, Southern Nigeria using 2D ERT Journal of King Saud University: Science 2D ERT Wenner array Aquifer Saltwater Coastal area Southern Nigeria |
| title | Towards understanding the extent of saltwater incursion into the coastal aquifers of Akwa Ibom State, Southern Nigeria using 2D ERT |
| title_full | Towards understanding the extent of saltwater incursion into the coastal aquifers of Akwa Ibom State, Southern Nigeria using 2D ERT |
| title_fullStr | Towards understanding the extent of saltwater incursion into the coastal aquifers of Akwa Ibom State, Southern Nigeria using 2D ERT |
| title_full_unstemmed | Towards understanding the extent of saltwater incursion into the coastal aquifers of Akwa Ibom State, Southern Nigeria using 2D ERT |
| title_short | Towards understanding the extent of saltwater incursion into the coastal aquifers of Akwa Ibom State, Southern Nigeria using 2D ERT |
| title_sort | towards understanding the extent of saltwater incursion into the coastal aquifers of akwa ibom state southern nigeria using 2d ert |
| topic | 2D ERT Wenner array Aquifer Saltwater Coastal area Southern Nigeria |
| url | http://www.sciencedirect.com/science/article/pii/S1018364722005523 |
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