Introduction: This technical paper will demonstrate the importance of
subsurface characterization for engineering purposes such as
construction and road failure.
Aims: Geoelectrical method was deployed at Fountain University located
at Oshogbo, Osun state with the aim of characterizing the subsurface
geological layers within the premises.
Materials and Methods: Seventeen (17) VES were acquired with PASI
16-GL along three 100-meter traverses. Electrical resistivity data was
plotted on a log-log graph, curve matched and subjected to computer
iteration software.
Results: The interpreted results showed that the entire region generally
consists of four to five sublayers; topsoil with resistivity values ranging
between 27.5 Ωm and 967.1 Ωm at maximum depth of 0.9 m beneath the
earth surface, weathered layer with resistivity values ranging between 60.8
Ωm and 505.1 Ωm at a maximum depth of 15.8 m and partly weathered
layer with resistivity values ranging from 150.8 Ωm – 1130.0 Ωm at
maximum depth of 26.9 m beneath the earth surface, clay with resistivity
values ranging between 4.0 Ωm and 42 Ωm at maximum depth of 16.9 m
beneath the earth surface, fractured basement with resistivity values
ranging between 103 Ωm – 460.0 Ωm at maximum depth of 92.6 m and
fresh basement with resistivity values ranging from 931 Ωm – 5432.0 Ωm.
Conclusion: This study can be used as a reconnaissance material for
groundwater, engineering, and environmental purposes in the surveyed
area, it can also serve as a template in other similar terrain.