Abstract
Electrical resistivity method using vertical electrical sounding (VES) technique and Schlumberger array was employed with the aim of delineating limits and types of aquifer system(s), and stratigraphic composition of the Demsa area, a confluence of Benue River in Northeast Nigeria. The result revealed that the hydrogeology of the area may be controlled by fractures (secondary porosity) developed in sedimentary units. Two aquifers, namely the upper alluvial aquifer and the confined deeper aquifer systems exist in the study area. The two aquifers occur at depths of 20.5 – 41 m, and 43.8 – 78.9 m respectively, and are separated by a thin layer of poorly permeable clays and silts, ranged between 1.1 – 5.3 m in thickness. The lateral extent of the aquifer systems extend almost evenly across the area. The aquifers’ thickness tends to decrease with increase in distance of VES station from the Benue River which suggested that the aquifer systems are probably recharged by direct escapement of the Benue River.
Publisher
Granthaalayah Publications and Printers
Reference16 articles.
1. Bowling, J.C., Zheng, C., Rodriguez, A.B., Harry, D.L., 2006. Geophysical constraints on contaminant transport modeling in a heterogeneous fluvial aquifer. J. Contam. Hydrol. https://doi.org/10.1016/j.jconhyd.2006.01.006
2. Cardiff, M., Bakhos, T., Kitanidis, P.K., Barrash, W., 2013. Aquifer heterogeneity characterization with oscillatory pumping: Sensitivity analysis and imaging potential. Water Resour. Res. https://doi.org/10.1002/wrcr.20356
3. Falgàs, E., Ledo, J., Benjumea, B., Queralt, P., Marcuello, A., Teixidó, T., Martí, A., 2011. Integrating Hydrogeological and Geophysical Methods for the Characterization of a Deltaic Aquifer System. Surv. Geophys. https://doi.org/10.1007/s10712-011-9126-2
4. Ginaya, M.A., Yagoob, A.M., 2017. Exploration for Groundwater Aquifers , using Vertical Electrical Sounding ( VES ) method , in Wad Hamid area – River Nile State , Sudan 18, 60–70.
5. Hubbard, S.S., Rubin, Y., 2000. Hydrogeological parameter estimation using geophysical data: A review of selected techniques. J. Contam. Hydrol. https://doi.org/10.1016/S0169-7722(00)00117-0