GEOELECTRIC INVESTIGATION OF THE BASEMENT STRUCTURE AND GROUNDWATER POTENIAL OF THE UNIVERSITY OF JOS PERMANENT SITE
GEOELECTRIC INVESTIGATION OF THE BASEMENT STRUCTURE AND GROUNDWATER POTENIAL OF THE UNIVERSITY OF JOS PERMANENT SITE
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Date
1999-07
Authors
ZUME, JOSEPH TERZUNGWE
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Abstract
A geoelectric investigation employing the conventional vertical electrical
sounding (VES) as well as resistivity and electromagnetic profiling was carried out
on the permanent site of the University of Jos. Twenty Six VES stations were
occupied together with four resistivity Profiles as well as three EM Profiles. The
survey was carried out to determine the basement structure and the groundwater
potential of the area.
Interpretations of the VES data yielded results that were used to produce
geoelectric and geologic sections. These together with the isoresistivity maps, were
used to draw certain conclusions. There was good correlation between the profiling
(Electrical resistivity and EM) and the VES results.
The results of the study indicate that the study area is underlain by 3 - 5
geoelectric layers. There is a thin superficial layer whose resistivity values range from
15 - 1500 ohm-m. The second, third, fourth and fifth layers have resistivity values
ranging from 25 - 200 ohm-m, 201 - 500 ohm-m, 500 - 1000 ohm-m, and above 1000
ohm-m respectively.
The study also reveals that the aquifer system in the area occurs in the
weathered and the fractured basement.
From the analysis of the bioelectric/geologic sections, the depth to basement
map as well as the aquifer thickness map, the most favorable regions for groundwater
exploitation in the area were found to be around VES 13, 10 19, 23, and VESl(in
order of preference).
The depth to the basement map produced shows that the bedrock in the study
area is undulating being deeper in the northern region. Furthermore, the map seem
to suggest that the drainage pattern in the river Dilimi is structurally controlled
Description
A THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL,
AHMADU BELLO UNIVERSITY ZARIA, IN PARTIAL FULFILMENT
FOR THE AWARD OF THE DEGREE OF MASTER OF SCIENCE IN
APPLIED GEOPHYSICS.
DEPARTMENT OF PHYSICS
FACULTY OF SCIENCE
AHMADU BELLO UNIVERSITY, ZARIA.
JULY, 1999
Keywords
GEOELECTRIC,, INVESTIGATION,, BASEMENT,, GROUNDWATER,, POTENIAL,, UNIVERSITY,, PERMANENT SITE.