Integrating Resistivity Techniques for Optimum Groundwater Exploration and Development within a Hotel Facility in Osogbo, Southwestern Nigeria
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Date
2021-02
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Volume Title
Publisher
J. Appl. Sci. Environ. Manage.
Abstract
This work is an attempt to combine dipole-dipole profiling and vertical electrical sounding techniques
of electrical resistivity methods to investigate the groundwater potential within the premises of a 3-star hotel facility in
Osogbo, Nigeria by delineating the geoelectric layers, delineating the low resistivity layers, determining the lithologies
and hence, delineating the groundwater bearing zones. The five vertical electrical sounding data were collected along two
pre-surveyed dipole-dipole traverses at right angle to each other beside the fences of the premises using the ABEM SAS
300c terrameter. The observed data were interpreted quantitatively using curve matching and computer-assisted iteration
method using the WinResist and Dipro software. The results of the inversion show that the lithology comprises of the top
soil and an intermittent sequence of sand and lateritic clay having varying resistivity and thickness. The aquiferous layer
was observed to be located at a depth of 23 m to 25 m due to the low resistivity and high thickness of the aquiferous layer.
The result of the 2-D imaging closely correlates with the result of the vertical electrical sounding. Thus, combining these
techniques in groundwater investigation has achieved similar result as the Werner technique and has reduced ambiguity
and error in positioning for drilling.
Description
Staff Publication
Keywords
Resistivity,, Groundwater Exploration,, Dipole-Dipole