DIRECT CURRENT RESISTIVITY AND SELF-POTENTIAL INVESTIGATIONS AT SHONGA (KWARA STATE, NIGERIA)
DIRECT CURRENT RESISTIVITY AND SELF-POTENTIAL INVESTIGATIONS AT SHONGA (KWARA STATE, NIGERIA)
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Date
1981-06
Authors
ALADE, OLANIYI NELSON
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Abstract
Shonga, the study area is s i t u a t e d in the alluvium of the
River Niger, in Kwara S t a t e , Nigeria, Between November 1980
and January 1981, twenty nine Vertical E l e c t r i c a l Sounding
and four Horizontal R e s i s t i v i t y P r o f i l i n g of a t o t al
l e n g t h of 4.7 km using the Schlumberger and the Wenner
e l e c t r o d e arrays r e s p e c t i v e l y were undertaken in the study
a r e a . The aim was to map the aquifers and to determine
the a p p l i c a b i l i t y of the dc r e s i s t i v i t y methods in d e l i n e a t i ng
the extent of iron contamination of the groundwater; since
hydrochemical data i n d i c a t e s a high iron content (19 ppm),
in the only borehole and a high chloride ion in some large
diameter wells of the study area. In March, 1981 an SP
survey with a t o t a l length of 3.7 Km t h a t cut across the
l e n g t h of the study area was carried out for d e l i n e a t i ng
the extent of high chloride content in the aquifer.
The e l e c t r i c a l r e s i s t i v i t y method has mapped the
a q u i f e r s of the study area. However, q u a l i t a t i v e and
q u a n t i t a t i v e i n t e r p r e t a t i o n s do not d e l i n e a t e the extent
of iron contamination in the a q u i f e r s . Correlation with
hydrochemical data from nearby wells has shown the high
SP anomalies to represent the high chloride ion water -
bearing aquifers of the study area.
The southern half of the study area has been
identified as having fresh water aquifers; hence,
future boreholes and wells are recommended to be sited
in t h i s region.
Description
Thesis Submitted in Partial Fulfillment of
the requirements for the
MASTER OF SCIENCE. (Applied Geophysics)
Department of Physics
Ahmadu Bello University
Zaria - Nigeria
JUNE, 1981
Keywords
DIRECT,, CURRENT,, RESISTIVITY,, SELF-POTENTIAL,, INVESTIGATIONS,, SHONGA,, (KWARA STATE,, NIGERIA).