Abstract
This paper presents result of 30 vertical electrical soundings carried out in Makurdi, Benue state capital, north–central Nigeria to evaluate aquifer protective capacity and soil corrosivity of overburden units in the study area. This was done using the Schlumberger electrode array to obtain the data and was modelled using computer iteration (Winresist software). The field data gives a resolution with 3–4 geoelectric layers and the observed frequencies in curve types include: 30% of KQ, 16.67% of QH, 6.67% of AA and K, 3.33% of HA, Q and A, 10% of H, KH and HK. Using the longitudinal unit conductance (S), the protective capacities of the study area were classified as 36.67% weak, 10% poor, 40% moderate, and 13.33% as good. The corrosivity ratings of the study area show that 10% is strongly corrosive, 23% moderately corrosive, 37% slightly corrosive, and 30% noncorrosive The results reasonably provide information on areas where industries can be sited and iron pipes can be laid in order to safeguard the hydrological setting for resident’s safety in the study area. Regions with moderate/good protective capacity are good sites for locating boreholes.
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Authors are grateful to Mr Victor Omonona, Dr J U Chukudebelu and Prof. F N Okeke (FAAS) for their wonderful contributions. They thank Subimal Ghosh, the Associate Editor and the reviewers for their meticulous fast review work.
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Obiora, D.N., Ajala, A.E. & Ibuot, J.C. Evaluation of aquifer protective capacity of overburden unit and soil corrosivity in Makurdi, Benue state, Nigeria, using electrical resistivity method. J Earth Syst Sci 124, 125–135 (2015). https://doi.org/10.1007/s12040-014-0522-0
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DOI: https://doi.org/10.1007/s12040-014-0522-0