Integration of Elevation, Lithology and Geoelectric Parameters Using Analytical Hierarchy Process for Groundwater Potential Evaluation in Part of Akure Metropolis, Southwestern Nigeria
Published: 2023-10-10
Page: 189-203
Issue: 2023 - Volume 6 [Issue 3]
I. A. Adeyemo *
Department of Applied Geophysics, Federal University of Technology, Akure, Nigeria.
A. O. Adegoke
Department of Physical Sciences, Olusegun Agagu University of Science and Technology, Okitipupa, Nigeria.
O. B. Ojo
Department of Earth Sciences, Adekunle Ajasin University, Akungba Akoko, Nigeria.
O. T. Adeniyi
Department of Applied Geophysics, Federal University of Technology, Akure, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
This hydrogeophysical study was carried out in order to proffer solutions to inadequate water supply plaguing Obanla-Obakekere, in the campus of Federal University of Technology, Akure (FUTA) Nigeria. The depth sounding method engaged the Schlumberger configuration. Three to five geoelectric layers were delineated from the results. The layer resistivities vary from 33 - 548 Ω-m, 13 - 6110 Ω-m, 42 - 90,232 Ω-m, 60 - 89,806 Ω-m and 711 - 100,000 Ω-m in the topsoil, weathered layer, weathered basement, partially weathered/partially fractured basement and the presumed fresh basement respectively. Elevation and lithology data were combined with six geoelectrically derived parameters (aquifer resistivity, aquifer thickness, longitudinal conductance, transverse resistivity, longitudinal resistivity and coefficient of anisotropy) to evaluate the groundwater potential of the study area. Each of these hydrogeological/hydrogeophysical significance parameters were presented as map showing different groundwater potential zones in the area. The maps were integrated using the Analytical Hierarchy Process (AHP) method. The groundwater potential map (GPM) shows that the northcentral area, the western and eastern flanks area has high to very high groundwater potential. These zones constitute about 40% of the study area, while the remaining segments, classified as moderate and low prospect, constitute about 38% and 22% respectively. The model GPM was validated using evidence of producing wells/boreholes. 13.89% of the producing wells/boreholes falls within the low groundwater potential zones, 30.55% falls within moderate groundwater potential zones and 55.56% falls within high and very high potential. This study can serve as guide for future groundwater development efforts in the study area.
Keywords: Lithology, geoelectric, aquifer, groundwater potential
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References
Delleur JW. Elementary Groundwater Flow and Transport Processes, In Handbook of Groundwater Engineering. 1999:4.
Adeyemo IA. Construed Geotechnical Significance of Geoelectric sounding and Hydro-geological Measurement at the Eastern Border of Federal University of Technology, Akure campus, Nigeria. IOSR Journal of Applied Geology and Geophysics. 2019;7(6):Series III, 37-45. DOI: 10.9790/0990-0706033745
Adeyemo IA, Akande VO, Mamukuyomi EA. Integrated Geophysical Investigations for Groundwater Development in a Difficult Hard Rock Terrain: Case Study of SEMS Phase 3, Federal University of Technology, Akure Nigeria. IOSR Journal of Applied Geology and Geophysics. 2019; 7(6):Series III,46-56. DOI: 10.9790/0990-0706034656.
Omosuyi GO, Ojo JS, Enikanselu PA. Geophysical Investigation for Groundwater around Obanla-Obakekere in Akure Within the Basement Complex of Southwestern Nigeria. Journal of Mining and Geology. 2003;39(2):1009-116.
Omosuyi GO, Adeyemo IA, Adegoke AO. Investigation of Groundwater Prospect Using Electromagnetic and Geoelectric Sounding at Afunbiowo, near Akure, Southwestern Nigeria. The Pacific Journal of Science and Technology. 2007;8(2): 172-182.
Akintorinwa OJ, Olowolafe TS. Geoelectric evaluation of groundwater prospect within Zion Estate, Akure, Southwest, Nigeria. International Journal of Water Resources and Environmental Engineering. 2013;5(1): 12-28.
Adeyemo IA, Akande VO, Mamukuyomi, EA. Integrated Geophysical Investigations for Groundwater Development in a Difficult Hard Rock Terrain: Case Study of SEMS Phase 3, Federal University of Technology, Akure Nigeria. IOSR Journal of Applied Geology and Geophysics. 2019; 7(6):Series III,46-56. DOI: 10.9790/0990-0706034656.
Saaty TL. The analytical hierarchy process: planning, priority setting, resource allocation. McGraw-Hill, New York; 1980.
Saaty TL. Analytic Hierarchy Process. Encyclopedia of Biostatistics.
Iloeje NP. A new Geography of Nigeria (New Revised Edition). London, UK; Longman Group; 1980.
Olayanju GM, Ojo AO. Magnetic Characterization of Rocks Underlying FUTA Campus Southwest Nigeria. Journal of Environment and Earth Science (JEES), of International Institute for Science, Technology and Education (IISTE), Journal of Environment and Earth Science. 2015;5(14):113-127.
Keller GV, Frischknecht FC. Electrical methods in geophysical prospecting. Pergamon Press, Oxford. 1966.
Koefoed O. Geosounding Principles 1. Resistivity Measurements. Elsevier Scientific Publishing, Amsterdam, Netherlands. 1979; 275p.
Vander Velpen BPA. Window RESIST Software Version 1.0. ITC, IT-RSG/GSD, Delft, Netherlands. 2004.
Zohdy AAR, Eaton GP, Mabey DR. Application of Surface Geophysics to Ground - Water Investigations, In Techniques of Water - Resources Investigations of the United States Geological Survey.1974;2(1):63.
Fashae OA, Tijani MN, Talabi AO, Adedeji, OI. Delineation of Groundwater Potetial Zones in the Crystalline Basement Terrain of SW-Nigeria: An Integrated GIS and Remote Sensing Approach. Applied Water Science, Springer Link. 2013;(4):19-38.
Adeyemo IA, Omosuyi GO, Ojo BT, Adekunle A. Groundwater Potential Evaluation in a Typical Basement Complex Environment Using GRT Index - A Case Study of Ipinsa-Okeodu Area, near Akure, Nigeria. Journal of Geoscience and Environment Protection (GEP), Scientific Research. 2017;5(3):240-251. DOI:doi.org/10.4236/gep.2017.53017
Rahaman MA. Review of the basement geology of South-Western Nigeria. In Kogbe C. A. (ed) Geology of Nigeria, 2nd Edn, Elizabethan Publishers, Lagos. 1976; 41-58.
Rahaman MA. Recent advances in the study of the basement complex of Nigeria. In: Geological Survey of Nigeria (ed) Precambrian Geol Nigeria. 1989;11-43.
Obaje NG. Geology and Mineral Resources of Nigeria. Published by Springer-Verlag Berlin Heidelberg. 2009; 221.
Akinlalu AA, Omosuyi GO, Oni TE. Groundwater vulnerability assessment using hydrogeologic and geoelectric layer susceptibility indexing at Igbara Oke, Southwestern Nigeria. Journal of Astronomy and Geophysics. 2017a;04: 009. DOI:dx.doi.org/10.1016/j.nrjag.
Adiat KAN, Nawawi MNM, Abdullah K. Assessing the Accuracy of GIS-Based Elementary Multi criteria Decision Analysis as a Spatial Prediction Toll - A case of Predicting Potential Zones of Sustainable Groundwater Resources, Journal of Hydrology. 2012;440-441(75-89):130-144. DOI:10.1016/j.jhydrol.2012.03.028
Adiat KAN, Nawawi MNM, Abdullah K. Application of multi-criteria decision analysis to geoelectric and geologic parameters for spatial prediction of groundwater resources and aquifer evaluation. Pure and Applied Geophysics, Springer. 2013;170(3):156-174. DOI:10.1007/s00024-012-0501-9.
Akinlalu AA, Adegbuyiro A, Adiat KAN, Akeredolu BE, Lateef WY. Application of multi-criteria decision analysis in prediction of groundwater resources potential: a case of Oke-Ana, Ilesa Area Southwestern, Nigeria. NRIAG J Astron Geophys. 2017b; 6(1):184-200.