Browsing by Author "Obaro, R.I.,"

Now showing 1 - 2 of 2
  • Item
    Hydro-Geophysical Assessment of Groundwater Resources within Parts of Omu-Aran, South-western,Nigeria
    (Published by Department of Civil Engineering, University of Ilorin, Ilorin, Nigeria, 2018) Iheme, K.O.; Usman, O.A.,; Obaro, R.I.,; Aganigbo, C.I.,; Gbadebo, A.F
    Hydro-geophysical assessment of groundwater resources in part of Omu Aran South Western Nigeria has been evaluated and analyzed with a view of delineating the groundwater potentials and aquifer characteristics within the study area. Eleven-(11) vertical electrical soundings (VES) were acquired with a maximum half current electrode spacing of 75 metres using ABEM 3000 SAS Tetrameter and the sounding data were processed and interpreted using partial curve matching method by the computer iteration techniques. Results from the geo-electric sections revealed the presence of three to five geo-electric layers. The depth to water table ranges between 2.59m and 71.9m and a resistivity of 89.9 to 3072 Ωm. The depth to Watertable is deepest around Omu area with depth of 71.9m. The result of the geophysical analysis correlates positively with themselves showing similarity in geology. The result shows that the weathered basement is a primary target for ground water exploration in the studied area, as the area is void of prominent fracture which is a target for ground water exploration. It is recommended that an average depth of 7.0m should be drilled for borehole within the northern part of the studied area and a depth of about 10.0m in the southern part of the study area. All these deductions were reached after qualitative and Iheme USEP: Journal of Research Information in Civil Engineering, Vol.15, No.4, 2018 et al 2394 quantitative interpretation of the geophysical data, and considering geology of the area.
  • Item
    Hydrogeochemical profiling and suitability evaluation of groundwater for industrial and municipal applications in the Southern Anambra Basin, Nigeria
    (University of Technology Sarawak, Malaysia., 2026) Iheme, K.O.,; Akakuru, O.C.,; Abubakar, H.O.,; Usman, A.O.,; Alebiosu, M.T.,; Obaro, R.I.,; Olelewe, M.C.,; Omorinoye, O.A.
    Groundwater’s hydrogeochemical properties play a crucial role in determining its suitability for industrial and municipal applications. This study assessed groundwater in the Southern Anambra Basin, Nigeria, by analyzing its physicochemical characteristics and applying hydrogeochemical and industrial water quality indices. A total of fifty-five (55) groundwater samples were systematically collected from boreholes across the study area. Samples were analyzed for key physicochemical parameters, including pH, EC, TDS, major cations (Ca²⁺, Mg²⁺, Na⁺, K⁺) and anions (HCO₃⁻, Cl⁻, SO₄²⁻, NO₃⁻). Data were interpreted using Piper, Gibbs, and Gaillardet diagrams, along with saturation indices and chloro-alkaline indices, to identify hydrogeochemical facies and dominant processes. Industrial suitability was evaluated using the Langelier Saturation Index (LSI), Aggressive Index (AI), and Puckorius Index (PI). The study aimed to (1) characterize the hydrogeochemical facies of groundwater in the Southern Anambra Basin; (2) determine the dominant geochemical processes influencing groundwater chemistry; and (3) assess the suitability of groundwater for industrial and municipal systems based on its scaling and corrosive tendencies. The results reveal that groundwater is mainly of the Ca²⁺+Mg²⁺–HCO₃⁻ and Ca²⁺+Mg²⁺–SO₄²⁻–Cl⁻ facies, dominated by rock–water interactions. Saturation index values for minerals such as calcite, dolomite, and gypsum were <0, indicating undersaturation and a tendency toward dissolution. LSI, AI, and PI values ranged from −3.22 to −0.03, 8.61 to 11.89, and 3.84 to 8.31, respectively implying a high corrosivity and low scaling potential of groundwater within the study area. These findings suggest that the water poses a corrosion risk to metallic industrial and municipal infrastructure. Mitigation measures such as corrosion-resistant materials and pH adjustment are recommended to preserve system integrity.