Delineation of Groundwater at Iseyin, South Western Nigeria

Abel Giwa Usifo *

Department of Physical and Earth Sciences, Crawford University, Igbesa, Nigeria.

Adewole John Adeola

Department of Physical and Earth Sciences, Crawford University, Igbesa, Nigeria.

*Author to whom correspondence should be addressed.


Abstract

Aims: This research was carried out to determine: the variation in resistivity of the different soil profiles in the area, the depth and thickness of the weathered basement, the depth and thickness of the aquifer, the depth to basement, and to establish areas suitable for borehole development.

Materials and Methods: Vertical Electrical Sounding (VES) was carried out using Schlumberger electrode array. A pair of potential and current electrodes was arranged in such a way that the potential electrodes were positioned in between the current electrodes and the positioning of the electrodes was set out using the measuring tape. The Ohmega resistivity meter was used for the data collection which measures the apparent resistivity of the subsurface.

Results and Conclusions: The results showed that the area is composed of four (4) to five (5) layers, namely; the topsoil, clay, sandy clay/clayey sand, sand, and dry sand. The top soil has apparent resistivity ranging from 134.2 to 790.9 \(\Omega\)m with thickness and depth between 0.4 and 2.4 m. Clay is found mainly in traverses 1, 7, and 8. It has apparent resistivity ranging from 37 to 77.4 \(\Omega\)m , thickness between 2.9 and 1.9 m and depth within 5.0 and 16.9 m. Sandy clay/ clayey sand are concentrated in traverses 1, 3, 5 and 8 with apparent resistivity range between 18.4 and151.8 \(\Omega\)m ; thickness of about 1.3 to 18.8 m , and depth ranging from 2.3 to 35.7 m. The sand has apparent resistivities of about 226.2 to 610.8; thickness between 0.4 and 7.7 m, and depth ranging from 1.0 to 12.2 m. They are found in traverses 2, 3, and 4. Dry sand/ dry sand (with quartzite) have apparent resistivities ranging from 407.8 to 924.3 \(\Omega\)m . It has thickness ranging from 0.8 to 3.2 m and depth between 0.8 and 5.1 m. Perched aquifer could be found in sand and sandy clay. Wet sand contains both confined and unconfined aquifers while clayey sand harbours confined aquifer.

Keywords: Schlumberger array, vertical electrical sounding, Iseyin, aquifer, basement


How to Cite

Usifo, Abel Giwa, and Adewole John Adeola. 2024. “Delineation of Groundwater at Iseyin, South Western Nigeria”. Current Journal of Applied Science and Technology 43 (6):78-90. https://doi.org/10.9734/cjast/2024/v43i64388.

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References

Akujieze CN, Coker S, Oteze G. Groundwater in Nigeria – A millennium experience – distribution, practice, problems and solutions. Hydrogeol J. 2003;11(2):259-74. DOI: 10.1007/s10040-002-0227-3

Sunkari ED, Kore B, M, Abioui M. Hydrogeophysical appraisal of groundwater potential in the fractured basement aquifer of the federal capital territory, Abuja, Nigeria, Results in Geophysical Sciences. 2021;5:100012. DOI: 10.1016/Ringps.2021.100012

Dawodu FA. Geoelectric investigation of Groundwater conditions: A cas study of Ogwashi – Uku in Delta State, Nigeria. J Niger Assoc Math Phys. 2013;25(2):81-8.

Hamill L, Bell F, U. ’Groundwater Resources Development’, Britain library cataloguing in publication data London. 1986;151-8.

Gbadebo AM, Taiwo AM, Ayedun H, Adeola AJ. Geochemical analysis of groundwater quality in agbara and environs. Appl Ecol Environ Res. 2012;2-3.

Rahaman MA. Recent advances in the study of the Basement Complex of Nigeria. J Geol Surv Niger. 1988;1:1-44.

Olayinka AI, Olayiwole MA. An integrated use of geoelectrical imaging and hydrochemical methods in delineating limits of polluted surface and groundwater at a Landfill site in Ibadan area, Southwestern Nigeria. J Min Geol. 2001; 37(1):53-68.

Rahaman MA. Review of basement geology of South Western Nigeria in geology of Nigeria Kogbe, editor. 1976;41-8.

Telford WM, Geldart LP, Sheriff RE, Keys DA. Applied geophysics. 2nd ed. London: Cambridge University Press. 1976;522-76.

Okunlola O, Akintola AI, Akintola GO. Compositional features of precambrian pegmatites of Ago-Iwoye, South western, Nigeria; 2016.

Olayinka AI, Oladunjoye MA. Hydro-geophysical evaluation of groundwater potential of the University of Ibadan Campus, Southwestern Nigeria. Water Resour. 2014;24:88-118.

Loke MH, Acworth I, Dahlin T. A comparison of smooth and blocky inversion Methods in 2-D electrical imaging surveys. Expl Geophys. 2003;34(182): 187.