TY  - JOUR
T1  - Geophysical Investigation of Aquifer Layer of Landmark University Community,
Omu-Aran, Nigeria using Electrical Resistivity Method
AU - Oloruntoba, Odeyemi Emmanuel AU - Oluwasegun, A. Olaonipekun AU - Oluwafemi, Daodu 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 12
SP  - 4285
EP  - 4289
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.4285.4289
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.4285.4289
KW  - Vertical electrical sounding
KW  -groundwater
KW  -basement
KW  -Landmark University
KW  -weathered basement
KW  -infinitely
AB  - The availability of water is one challenge confronting Landmark University community an institution
on the outskirt of Omu-Aran, Southwestern Nigeria. Geophysical survey was carried out to evaluate the ground
water potential of the basement complex and to delineate potential locations for siting boreholes within the
community. A total of seven Vertical Electrical Sounding (VES) were carried out. Data acquisition involved the
use of shlumberger electrode configuration with half current electrode spacing (AB/2) ranging from 1-100 m.
Interpretation of the geoelectric data involved the use of curve matching technique and computer iteration.
Available lithologic data from previous workers were used to evaluate geophysical results. The interpretation
revealed three and four model curves, H, HA, A and KH-types with the KH-type curves being the dominant
types. Four subsurface layers comprising top soil, lateritic soil, weathered layer, fractured basement and fresh
basement were inferred from the interpretation. The top/lateritic soil layers are of varying thickness and
resistivity values. The fractured and weathered basements with relatively lower resistivity are inferred to be
aquiferous zone and could bear productive water for ground water supply. The basement has the lower most
infinitely thick layer with resistivity mostly <1500 &Omega;m. The results of the soundings greatly contribute to the
understanding of the hydro geology of the basement complex. The fractured and weathered basement aquifers
can be developed for suitable water supply to the university community.
ER  -