Hydrogeophysical Mapping of Basement Aquifers in Part of Southwestern Nigeria: Implications for Groundwater Resource Management
<p id="p1">The research focuses on basement aquifers in crystalline bedrocks, which are vital for groundwater in tropical areas. Geophysical techniques, like geoelectrical resistivity, assess these aquifers’ variability. The study combines geoelectrical soundings with two-dimensional electrica...
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| Autores principales: | , |
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| Formato: | Capítulo de libro |
| Lenguaje: | inglés |
| Publicado: |
IntechOpen
2025
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| Materias: | |
| Acceso en línea: | https://www.intechopen.com/chapters/89779 |
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| Sumario: | <p id="p1">The research focuses on basement aquifers in crystalline bedrocks, which are vital for groundwater in tropical areas. Geophysical techniques, like geoelectrical resistivity, assess these aquifers’ variability. The study combines geoelectrical soundings with two-dimensional electrical resistivity tomography (2D ERT) to analyze the fractured and weathered zones in Abeokuta basement terrain. This approach delineates the aquifer’s nature, extent, and spatial variability, providing insights into near-surface conditions. Understanding and managing basement aquifers are crucial for ensuring a sustainable and reliable supply of groundwater, environmental preservation, and meeting the water supply of various communities. The hydrogeological conceptual model of the area reveals that the area is underlain by two aquifers system. The shallow water table aquifer system consists of weathered saprolite, while the deeper aquifer system is weathered/fractured basement rock. The vertical electrical sounding (VES) results show the thickness of the shallow aquifer ranges from 5.6 to 9.2 m, and the depths to the top of this aquifer system ranges from 1.6 to 2.3 m. The thickness of the deeper aquifer system ranges from 4.5 to 9.5 m, and the depth of this aquifer system ranges from 8.4 to 18.3 m. The integration of VES and 2D ERT methods enhances the understanding and characterization of basement aquifers, aiding optimal well placement for sustained water yield.</p> |
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| ISBN: | 978-0-85014-345-4 |
| DOI: | 10.5772/intechopen.115603 |