© Global Journal Of Pure And Applied Sciences . 2001. Vol. 7 No. 1
Publisher: Bachudo Science Co. Ltd
Geographysical Exploration For Groundwater In A Sedimentary Environment: A Case Study From Nanka Formation In Anambra Basin, Southeastern Nigeria
E. A. Emenike
KEYWORDS: Vertical electrical Sounding, groundwater potential, aquifer thickness, Nanka Formation, Anambra Basin.
ABSTRACT:The interpretation of five restivity curves over Nanka town within geologic terrain often referred to as Nankaformation in Anambra Basin, south-eastern Nigeria indicates that the area has a great grouridwater potential. A correlation of the curves with the lilhologic log from a nearby borehole suggests that the major lithologic units penetrated by the sounding curves are Laterite, Clay Sandstone and clay. The sandstone unit which is the aquiferous zone has a resistivity range of between 500 ohm.m and 960ohm.m and thickness in excess of 200m. The depth to the water table is at least 1 00m .
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