Near-Surface Crustal Architecture and Geohydrodynamics of the Crystalline Basement Terrain of Araromi, Akungba-Akoko, SW Nigeria, Derived from Multi-Geophysical Methods

Akingboye, Adedibu Sunny; Bery, Andy Anderson; Kayode, John Stephen; Asulewon, Ayanfe Moses; Bello, Rereloluwa; Agbasi, Okechukwu Ebuka

doi:10.1007/s11053-021-10000-z

Cited by 16 publications

(16 citation statements)

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“…The area has topographic features consisting of hills, lowlying outcrops, plains, and valleys, between 280 m and 400 m above the mean sea level. The dendritic drainage system follows these topographic features, with trellis drainage patterns in a few places [3,7].…”

Section: Location and Geological Setting Of The Study Areamentioning

confidence: 90%

“…Globally, the percentage of potable water available to people has declined due to the increasing global population [1,2,3]. Sustainable groundwater yield in aquifer zones 1 A. S. Akingboye / J. Nig.…”

Section: Introductionmentioning

confidence: 99%

“…Sci. 4 (2022) 497 2 depends on the nature of subsurface lithologic units and their water retention capacity, porosities, permeabilities, and water-rock interactions, as well as the hydrodynamics of the aquifer units [3,4,5,6,7]. The sustainability of groundwater supplies also depends on the quality of the aquifers' yield, which is a function of the protective capacity of the lithologic unit overlying the aquifer zones and their depths.…”

Section: Introductionmentioning

confidence: 99%

“…The study area is located in the Araromi area of Akungba-Akoko, southwestern Nigeria. It is situated between Akungba-Akoko Township and Etioro-Akoko and is underlain by complex subsurface geology [3,7,17,18,19]. The study area has become a choice location for many locals, staff, and students of Adekunle Ajasin University, Akungba-Akoko (AAUA) due to its serenity and prospect of rapid urbanization.…”

Section: Introductionmentioning

confidence: 99%

“…The authors delineated shallow to deep-weathered/fractured aquifer units responsible for low to moderate groundwater yield. In the same geologic terrain, [3] investigated the near-surface crustal architecture and geohydrodynamics of the Araromi area, Akungba-Akoko using the integrated coplanar loop electromagnetic conductivity method, electrical resistivity tomography (ERT), and Schlumberger VES technique to proffer solutions to the challenges of groundwater availability and the failure of structural engineering foundations in this area. The authors also had similar results to [18], except that high groundwater yield was identified at highly conductive deep fractured zones extending to depths >52 m despite the thin overburden (<4 m).…”

Section: Introductionmentioning

confidence: 99%

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Geohydraulic characteristics and groundwater vulnerability assessment of tropically weathered and fractured gneissic aquifers using combined georesistivity and geostatistical methods

Akingboye

2022

J. Nig. Soc. Phys. Sci.

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Sustainable groundwater yield in aquifers depends on the protective capacity of the subsurface lithologies and conduit systems. Electrical resistivity tomography (ERT) and its Schlumberger vertical electrical sounding (VES) technique were employed to assess the groundwater yield of aquifer units and their vulnerability to contaminants in Araromi (Akungba-Akoko), southwestern Nigeria. Geohydraulic parameters: aquifer resistivity (\rho0), hydraulic conductivity (K), transmissivity (T), permeability (\Psi), hydraulic resistance (KR), and longitudinal conductance (S) were also evaluated. In addition, regression analysis was utilized to establish the empirical relationships between the K and other geohydraulic parameters, with their percentage contributions to posing vulnerability risk. The georesistivity results revealed four distinct layers: topsoil, weathered layer, partially weathered/fractured bedrock unit, and fresh bedrock. The K model regression-assisted analysis showed that the \rho, T, \Psi, and S contributed about 97.8%, 14%, 99.9%, and 11.5%, respectively, to the estimated aquifers’ K values for the study area. Except for T and S, the regression results had moderate to strong positive correlations with K; hence, this illuminates the essentiality of K in assessing groundwater potential and vulnerability. The aquifer units have low to moderate groundwater yield based on T values (1.67-17.57 m/day) caused by the generally thin overburden (<4 m). However, the deep-weathered and fractured aquifer units with depths ranging from 39-55 m could supply high groundwater yield for sustainable abstraction. The estimated S values (0.0226-0.1926 mhos) for aquifer protective capacity ratings rated the aquifer units in the area as poor to weak. Based on the estimated low logarithm of KR (log KR) values of 0.79-2.25 years, these aquifers have extremely high to moderate aquifer vulnerability index. As a result, prospective wells/boreholes in the study area and settings with similar geohydraulic and vulnerability characteristics should be developed adequately to prevent the infiltration of surface contaminants for potable groundwater abstraction.

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Section: Location and Geological Setting Of The Study Areamentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%