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Water table regime in parts of Obio-Akpor local Government area of Rivers State, Nigeria

Author Affiliations

  • 1Department of Earth Sciences, Federal University of Petroleum Resources Effurun P.M.B.1221, Warri, Nigeria
  • 2Department of Earth Sciences, Federal University of Petroleum Resources Effurun P.M.B.1221, Warri, Nigeria

Int. Res. J. Earth Sci., Volume 5, Issue (7), Pages 9-16, August,25 (2017)

Abstract

This research was conducted within Obio-Akpor Local Government Area of Rivers state to determine its groundwater potential due to the increasing demand for potable water arising from steep population growth. To enhance supply, in view of its urgency, the overburden thickness and water table distribution were determined in the area using the electrical resistivity method. The vertical electrical sounding (VES) technique, Schlumberger configuration and ABEM Terrameter SAS 300 with good sensitivity were employed to investigate the overburden thickness and layer resistivities. A total of ten (10) VES stations were randomly sampled within the study area. The current electrodes separation ranged from 200 to 700m permitting a depth probe of about 230m. The measured field data were plotted on a log-log paper to obtain the initial parameters which were uploaded into Schlumberger software for interpretation. The results offer valuable information on the variation in thickness and resistivities of the layers penetrated and equally indicate the groundwater potential of the area of study. Overburden thickness was found to range from 3.0 to 79.2m. The results of the VES data interpretation and water table measurements in the surrounding hand-dug wells consistently show that the North-western part of the area has higher depth values than the North-eastern part. This study reveals that the area is prolific for sustainable water resources supply and management. Besides, it shows that exploring for water within the North-eastern part will be cheaper than other parts of the prospect due to the shallow water table.

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