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Towards understanding the extent of saltwater incursion into the coastal aquifers of Akwa Ibom State, Southern Nigeria using 2D ERT
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$a Towards understanding the extent of saltwater incursion into the coastal aquifers of Akwa Ibom State, Southern Nigeria using 2D ERT $f Stephen E. Ekwok ... [et al.] 330 $a The hydro-lithostratigraphic units of the coastal area of Akwa Ibom State, Southern Nigeria were investigated involving electrical resistivity tomography (ERT) and Wenner array. This procedure and electrode configuration were adopted because of their wide range of sensitivity and inherent characteristics to geological materials. This study is aimed at defining the extent of saltwater invasions into the coastal and inland aquifers. The investigated area is divided into three zones A ( 0 < 20 km), B (<20 < 40 km), and C (>40 km)) based on the distance from the survey locations to the shoreline. The saline aquifer of the control tomogram obtained at the shoreline (Ibeno Beach) is characterized by the electrical resistivity of 0.159–3.55 Om. Within Zone A, (Ukpenekang, Eastern Obolo, and Okoro Ette), the saline aquifer is defined by electrical resistivity values of 0.33–44.0 Om, 2.07–48.5 Om, and 8.0–60.0 Om respectively. In general, the Zone B saline aquifers are defined by electrical resistivity values of 0.602–64.5 Om. Furthermore, the third zone which is situated a distance >40 km from the shoreline, is described by relatively higher electrical resistivity values (38.9–3260 Om) and indicates a region free from saltwater incursions. Generally, the 2D ERT models showed that electrically resistivity values increase progressively inland. 463 -1
$1 001 umb_un_cat*0315520 $1 011 $a 1018-3647 $1 011 $a 2213-686X $1 200 1 $a Journal of King Saud University - Science $v Vol. 34, no. 8 (2022), pp. [1-8] $1 210 $a Amsterdam $c Elsevier B.V. $d 2022 606 0-
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