COMPARING THE EFFECTIVENESS OF THE TWOELECTRODE ARRAY WITH THE SYMMETRICAL SCHLUMBERGER ARRAY OVER THE MAIN CAMPUS OF AHMADU BELLO UNIVERSITY, ZARIA
COMPARING THE EFFECTIVENESS OF THE TWOELECTRODE ARRAY WITH THE SYMMETRICAL SCHLUMBERGER ARRAY OVER THE MAIN CAMPUS OF AHMADU BELLO UNIVERSITY, ZARIA
No Thumbnail Available
Date
2000-09
Authors
YUSUF, DAVID BACHAMA
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
A geoelectric investigation employing vertical electrical soundings (VES) using
the Ajayi-Makinde two-electrode method, as used by Makinde (1996), and the
conventional Schlumbcrger configuration was carried out in the Main Campus of
Ahmadu Bello University (A.B.U.) Zaria with the aim of testing the reliability and
effectiveness of the said two-electrode method.
Results of the VES interpretation obtained in this work using the two-electrode
method have compared very well with those obtained from Schlumbcrger data gathered
in this work at the same VES stations used for the two-electrode method. The areas of
good agreement between the results of the two methods include: depth-to-basemenl
values (about 86 %), layer thicknesses (about 72 %) and resistivity values of the various
layers (about 52 %).
Interpretation of the two-electrode data and the Schlumbcrger data revealed that
the layering in the study area varied from 3 to 4 layers. The resistivity values of the top or
sueface layer, second layer and basement from the two-electrode method varied from 70
- 450 -m, 98 - 813 -m and 1000 - 3000 -m respectively while those from the
Schlumberger configuration data varied from 89 - 434 -m, 59 - 634 -m and 1000 -
3300 -m for the surface layer, second layer and the basement respectively.
The two methods show that the geometry of the bedrock underlying the Main
Campus is undulating with depth values increasing away from the central part of the
study area towards the southern, western and eastern parts of the study area. The depth to
the bedrock obtained from the two-electrode method ranges from about 11.5 m in the
central part of the study area to about 30.0 in around the southern end of the study area,
while that obtained from the Schlumberger configuration ranges from about 9.0 in in the
central part of the study area to about 28.0 m in the southern end of the study area.
Description
A THESIS SUBMITTED TO THE POSTGRADUATE
SCHOOL, AHMADU BELLO UNIVERSITY, ZARIA
IN PARTIAL FULFILLMENT FOR THE AWARD OF THE
DEGREE OF MASTER OF SCIENCE IN
APPLIED GEOPHYSICS.
DEPARTMENT OF PHYSICS
FACULTY OF SCIENCE
AHMADU BELLO UNIVERSITY, ZARIA
Keywords
COMPARING,, EFFECTIVENESS,, TWOELECTRODE,, ARRAY,, SYMMETRICAL,, SCHLUMBERGER,, MAIN CAMPUS,, AHMADU BELLO UNIVERSITY,, ZARIA