APPLICATION OF ELECTROMAGNETIC AND DIRECT-CURRENT RESISTIVITY METHODS TO GROUNDWATER EXPLORATION IN SELECTED VILLAGES IN NINGI L.G.A. BAUCHI STATE
APPLICATION OF ELECTROMAGNETIC AND DIRECT-CURRENT RESISTIVITY METHODS TO GROUNDWATER EXPLORATION IN SELECTED VILLAGES IN NINGI L.G.A. BAUCHI STATE
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Date
1998-11
Authors
SHEHU, Ahmed Danladi
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Abstract
vi
ABSTRACT
The search for groundwater in an area covered by the
basement complex and falls within the semi arid parts of
Northern Nigeria requires good application of geophysics and
the understanding of the geology of the area. This
underlines the need for a better approach to groundwater
studies under these geological conditions.
Two geophysical techniques, the EM and the electrical
resistivity methods have been employed in his work to
explore for groundwater in fifteen villages with acute water
problem in Ningi L.G.A of Bauchi State.
Conductivity(EM) readings were recorded along short
traverses of variable lengths in each village. The EM method
employs two modes of recording conductivity values, the
horizontal dipole mode and the vertical dipole mode. VES
data were collected at sites where the conductivity value in
the vertical dipole mode is greater than the horizontal
dipole mode.
A total of 37 VES stations were established and drilling
sites were recommended based on the geoelectric sections
obtained from the interpreted VES data.
The work showed that the two geophysical techniques can
be complimentarily applied to groundwater exploration in the
basement complex. The EM method was used as a recoinassance
tool, to determine areas with increasing conductivity with
depth. The electrical resistivity method was then used to
determine the depth to various conducting zones.
Description
DEPARTMENT OF PHYSICS
FACULTY OF SCIENCE
AHMADU BELLO UNIVERSITY, ZARIA.
Keywords
APPLICATION,, ELECTROMAGNETIC,, DIRECT-CURRENT,, RESISTIVITY METHODS,, GROUNDWATER EXPLORATION,, SELECTED VILLAGES,, NINGI L.G.A., BAUCHI STATE