Hydrogeological and electrostratigraphic modeling of coastal aquifers: Investigating systemic vulnerability, hydraulic yield potential, and corrosivity pathways
This study employed geo-electrostratigraphic and hydrogeological information to model and assess subsurface structure and hydrogeological properties within a major coastal environment in Nigeria's Niger Delta region, offering a high-resolution approach to groundwater resource management. The se...
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Elsevier
2025-06-01
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| Series: | Solid Earth Sciences |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2451912X25000169 |
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| author | Jewel E. Thomas Ndifreke I. Udosen Aniekan M. Ekanem Nyakno J. George |
| author_facet | Jewel E. Thomas Ndifreke I. Udosen Aniekan M. Ekanem Nyakno J. George |
| author_sort | Jewel E. Thomas |
| collection | DOAJ |
| description | This study employed geo-electrostratigraphic and hydrogeological information to model and assess subsurface structure and hydrogeological properties within a major coastal environment in Nigeria's Niger Delta region, offering a high-resolution approach to groundwater resource management. The selection of the study area was predicated on its critical residential, agricultural, and economic significance, as well as its susceptibility to hydrogeological challenges arising from rapid urbanization and industrial activities. Unlike previous studies that utilized these methods independently, this research combined different geoelectrical technologies to enhance the accuracy of subsurface characterization. The results delineated four distinct geo-layers characterized by specific resistivity values, thicknesses, and depths, providing crucial insights into groundwater infiltration, storage potential, and contamination risks. The first geo-layer (motley topsoil) had resistivity values ranging from 95.2 to 1463.7 Ωm. The second layer (sandy clay) exhibited resistivity values ranging from 8.8 to 2485.1 Ωm. The third layer, identified as fine sand, exhibited resistivity values ranging from 72.5 to 1332.7 Ωm. The fourth layer comprised coarse sands and it exhibited a mean resistivity of 525.98 Ωm, indicating a well-drained permeable formation that could serve as an additional aquifer unit. A key innovation of this study was the quantitative assessment of hydrogeological parameters, including anisotropic coefficient, transverse resistance, longitudinal conductance, and groundwater yield potential index. The anisotropic coefficient ranged from 1.0 to 1.78 (mean: 1.17), revealing minimal sediment invasion and confirming the dominance of arenaceous sediments in the Benin Formation. The groundwater yield potential index varied from 3.14 × 102 to 8.1465 × 104 Ωm2, highlighting areas of significant aquifer potential. The longitudinal conductance analysis revealed that 69 % of the study area has low aquifer protectivity, underscoring the region's vulnerability to contamination. Another novel contribution was the evaluation of soil corrosivity, which has direct implications for infrastructure longevity. Results indicate that 86 % of the study area is non-corrosive, making it suitable for long-term pipeline installation, a factor rarely integrated into groundwater assessments. The study alsoadvances understanding of the Benin Formation by linking resistivity variations to arenaceous-argillitic intercalations, and this significantly influences groundwater movement and contaminant transport. By synthesizing resistivity models, hydrogeological parameters, and contamination risk assessments, this research provides a more holistic framework for sustainable groundwater management. Furthermore, this research offers a robust framework for similar hydrogeophysical assessments in other regions with comparable geological and hydrological settings. |
| format | Article |
| id | doaj-art-673ae57232864334a29e1ccadbb73fec |
| institution | OA Journals |
| issn | 2451-912X |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
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| series | Solid Earth Sciences |
| spelling | doaj-art-673ae57232864334a29e1ccadbb73fec2025-08-20T02:10:07ZengElsevierSolid Earth Sciences2451-912X2025-06-0110210024310.1016/j.sesci.2025.100243Hydrogeological and electrostratigraphic modeling of coastal aquifers: Investigating systemic vulnerability, hydraulic yield potential, and corrosivity pathwaysJewel E. Thomas0Ndifreke I. Udosen1Aniekan M. Ekanem2Nyakno J. George3Geophysics Research Group, Physics Department, Akwa Ibom State University, NigeriaCorresponding author.; Geophysics Research Group, Physics Department, Akwa Ibom State University, NigeriaGeophysics Research Group, Physics Department, Akwa Ibom State University, NigeriaGeophysics Research Group, Physics Department, Akwa Ibom State University, NigeriaThis study employed geo-electrostratigraphic and hydrogeological information to model and assess subsurface structure and hydrogeological properties within a major coastal environment in Nigeria's Niger Delta region, offering a high-resolution approach to groundwater resource management. The selection of the study area was predicated on its critical residential, agricultural, and economic significance, as well as its susceptibility to hydrogeological challenges arising from rapid urbanization and industrial activities. Unlike previous studies that utilized these methods independently, this research combined different geoelectrical technologies to enhance the accuracy of subsurface characterization. The results delineated four distinct geo-layers characterized by specific resistivity values, thicknesses, and depths, providing crucial insights into groundwater infiltration, storage potential, and contamination risks. The first geo-layer (motley topsoil) had resistivity values ranging from 95.2 to 1463.7 Ωm. The second layer (sandy clay) exhibited resistivity values ranging from 8.8 to 2485.1 Ωm. The third layer, identified as fine sand, exhibited resistivity values ranging from 72.5 to 1332.7 Ωm. The fourth layer comprised coarse sands and it exhibited a mean resistivity of 525.98 Ωm, indicating a well-drained permeable formation that could serve as an additional aquifer unit. A key innovation of this study was the quantitative assessment of hydrogeological parameters, including anisotropic coefficient, transverse resistance, longitudinal conductance, and groundwater yield potential index. The anisotropic coefficient ranged from 1.0 to 1.78 (mean: 1.17), revealing minimal sediment invasion and confirming the dominance of arenaceous sediments in the Benin Formation. The groundwater yield potential index varied from 3.14 × 102 to 8.1465 × 104 Ωm2, highlighting areas of significant aquifer potential. The longitudinal conductance analysis revealed that 69 % of the study area has low aquifer protectivity, underscoring the region's vulnerability to contamination. Another novel contribution was the evaluation of soil corrosivity, which has direct implications for infrastructure longevity. Results indicate that 86 % of the study area is non-corrosive, making it suitable for long-term pipeline installation, a factor rarely integrated into groundwater assessments. The study alsoadvances understanding of the Benin Formation by linking resistivity variations to arenaceous-argillitic intercalations, and this significantly influences groundwater movement and contaminant transport. By synthesizing resistivity models, hydrogeological parameters, and contamination risk assessments, this research provides a more holistic framework for sustainable groundwater management. Furthermore, this research offers a robust framework for similar hydrogeophysical assessments in other regions with comparable geological and hydrological settings.http://www.sciencedirect.com/science/article/pii/S2451912X25000169Groundwater potentialGeoelectrical resistivity analysisSubsurface aquifer dynamicsSustainable hydrogeological managementElectrical Resistivity Tomography (ERT) |
| spellingShingle | Jewel E. Thomas Ndifreke I. Udosen Aniekan M. Ekanem Nyakno J. George Hydrogeological and electrostratigraphic modeling of coastal aquifers: Investigating systemic vulnerability, hydraulic yield potential, and corrosivity pathways Solid Earth Sciences Groundwater potential Geoelectrical resistivity analysis Subsurface aquifer dynamics Sustainable hydrogeological management Electrical Resistivity Tomography (ERT) |
| title | Hydrogeological and electrostratigraphic modeling of coastal aquifers: Investigating systemic vulnerability, hydraulic yield potential, and corrosivity pathways |
| title_full | Hydrogeological and electrostratigraphic modeling of coastal aquifers: Investigating systemic vulnerability, hydraulic yield potential, and corrosivity pathways |
| title_fullStr | Hydrogeological and electrostratigraphic modeling of coastal aquifers: Investigating systemic vulnerability, hydraulic yield potential, and corrosivity pathways |
| title_full_unstemmed | Hydrogeological and electrostratigraphic modeling of coastal aquifers: Investigating systemic vulnerability, hydraulic yield potential, and corrosivity pathways |
| title_short | Hydrogeological and electrostratigraphic modeling of coastal aquifers: Investigating systemic vulnerability, hydraulic yield potential, and corrosivity pathways |
| title_sort | hydrogeological and electrostratigraphic modeling of coastal aquifers investigating systemic vulnerability hydraulic yield potential and corrosivity pathways |
| topic | Groundwater potential Geoelectrical resistivity analysis Subsurface aquifer dynamics Sustainable hydrogeological management Electrical Resistivity Tomography (ERT) |
| url | http://www.sciencedirect.com/science/article/pii/S2451912X25000169 |
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