Integrated Geoelectrical and Geospatial Assessment of Groundwater Variation  in Selected Location, Port Harcourt, Rivers State, Nigeria

Authors

  • Sulyman Usamat
    KWARA STATE UNIVERSITY, MALETE
  • Godwin Babatunde Egbeyale
  • Sunday Ajani Adegbenro
  • Salami A. Oladipupo

Keywords:

Groundwater Potential, Aquifer Vulnerability, Vertical Electrical Sounding, Geographic Information System, Analytic Hierarchy Process, Port Harcourt

Abstract

Groundwater is the major source of potable water in Port Harcourt, Rivers State, Nigeria, owing to increasing degradation of surface water resources resulting from rapid urbanization, industrialization, and population growth. This study integrates Vertical Electrical Sounding (VES), Geographic Information Systems (GIS), Remote Sensing (RS), and the Analytic Hierarchy Process (AHP) to evaluate groundwater potential and aquifer vulnerability in the study area. Ten VES stations were investigated using the Schlumberger electrode configuration with current electrode spacing ranging from 2 to 200 m. The interpreted geoelectrical parameters were used to estimate aquifer hydraulic properties, including hydraulic conductivity, transmissivity, longitudinal conductance, transverse resistance, porosity, and permeability. Four groundwater conditioning factors, rainfall, geology, lineament density, and soil type, were integrated within a GIS environment using AHP to generate the Groundwater Potential Index (GWPI). The AHP weighting identified rainfall (55.8%) as the dominant groundwater conditioning factor, followed by geology (26.3%), lineament density (12.2%), and soil type (5.7%), with a consistency ratio of 0.045, indicating reliable pairwise judgments. Hydraulic conductivity ranged from 0.0839 to 28.7584 m/day, transmissivity from 6.1 to 853.1 m²/day, porosity from 0.1764 to 0.6870, and permeability from 100.32 to 34,380 mD, demonstrating considerable spatial heterogeneity in aquifer properties. The GWPI map classified the study area into Very Low, Low, Moderate, High, and Very High groundwater potential zones, with the western, northwestern, and central sectors exhibiting the most favourable groundwater conditions. Validation against VES-derived transmissivity showed 100% agreement, comprising 50% excellent and 50% good correspondence between the GIS-AHP predictions and geoelectrical interpretations. The integrated approach provides a reliable framework for groundwater exploration, borehole siting, aquifer protection, and sustainable groundwater resources management in rapidly urbanizing coastal environments.

Author Biographies

Godwin Babatunde Egbeyale

SUPERVISOR

Sunday Ajani Adegbenro

supervisor

Salami A. Oladipupo

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ABEM Instrument (2010). ABEM Instruction Manual: Terrameter SAS 4000 / SAS 1000. ABEM Instrument AB, Allén 1, S-172 66 Sundbyberg Sweden

Adeniji, A. A., Olorunfemi, M. O., & Akintorinwa, O. J. (2013). Geoelectric mapping of aquifer vulnerability in a basement terrain, southwestern Nigeria. Journal of Geology and Mining Research, 5(3), 61–69. https://doi.org/10.5897/JGMR12.031

Aladeboyeje, A. A., Adewumi, J. K., & Ogungbemi, A. (2021). GIS-based modeling for delineation of groundwater potential zones in basement complex terrain. Applied Water Science, 11, 23–35. https://doi.org/10.1007/s13201-021-01325-z

Aladeboyeje, A. I., Adewoyin, O. O., Akinyemi, M. L., & Adebayo, A. A. (2024). Integrated geophysical and GIS techniques for groundwater potential mapping in complex hydrogeological terrains. Results in Engineering, 21, 102235. https://doi.org/10.1016/j.rineng.2024.102235

Alaminiokuma, G. I., & Warmate, T. (2020). Post drilling investigation for prolific groundwater aquifer using geoelectric logging at Nigeria LNG Base, Port Harcourt. International Journal of Water Resources and Environmental Engineering, 12(1), 1–9. https://doi.org/10.5897/IJWREE2019.0911

Alloway, B. J., & Ayres, D. C. (1997). Chemical principles of environmental pollution (2nd ed.). Blackie Academic & Professional.

Arabameri, A., Arora, A., Pal, S. C., Mitra, S., Saha, A., Nalivan, O. A., Panahi, S., Rezaie, F., Lee, S., & Tiefenbacher, J. P. (2021). K-fold and state-of-the-art metaheuristic machine learning approaches for groundwater potential modelling. Water Resources Management, 35(6), 1979–2003. https://doi.org/10.1007/s11269-021-02815-5

Bobachev, C. (2002). IPI2Win: A Windows software for an automatic interpretation of resistivity sounding data (PhD thesis). Moscow State University.

Das, S., Patel, P. P., & Sengupta, S. (2022). Groundwater potential zone mapping using GIS, remote sensing and analytical hierarchy process: A review. Groundwater for Sustainable Development, 17, 100744. https://doi.org/10.1016/j.gsd.2022.100744

Doro, K. O., Adegboyega, C. O., Aizebeokhai, A. P., & Oladunjoye, M. A. (2020). Hydrological variability in crystalline basement aquifers: Insight from a first hydrogeophysics research site in Nigeria. In Proceedings of the 26th European Meeting of Environmental and Engineering Geophysics (NSG2020). European Association of Geoscientists & Engineers (EAGE). https://doi.org/10.3997/2214-4609.202020123

Ekanem, A. M., Ikpe, E. O., George, N. J., & Thomas, J. E. (2022). Integrating geoelectrical and geological techniques in GIS-based DRASTIC model of groundwater vulnerability potential in the raffia city of Ikot Ekpene and its environs, southern Nigeria. International Journal of Energy and Water Resources. https://doi.org/10.1007/s42108-022-00202-3

Ekanem, U. D., Edet, A. E., George, N. J., & Bassey, N. E. (2025). Integrated geophysical, hydrogeological and hydrogeochemical assessments of groundwater potentials in Ibiono Ibom Local Government Area of Northern Akwa Ibom State, Nigeria. Journal CleanWAS, 9(1), 22–35. https://doi.org/10.26480/jcleanwas.01.2025.22.35

Eke, P. O., & Life-George, F. (2018). Aquifer transmissivity values from VES for parts of Port Harcourt, Rivers State, Nigeria. International Journal of Research–Granthaalayah, 6(4), 357–366. https://doi.org/10.5281/zenodo.1248182

Fashae, O. A., Tijani, M. N., Talabi, A. O., & Adedeji, O. I. (2014). Delineation of groundwater potential zones in the crystalline basement terrain of southwestern Nigeria: An integrated GIS and remote sensing approach. Applied Water Science, 4(1), 19–38. https://doi.org/10.1007/s13201-013-0127-9

Freeze, B., & Cherry, J. A. (1979). Groundwater. Prentice Hall.

Frind, E. O., & Molson, J. W. (2018). Issues and options in the delineation of well capture zones under uncertainty. Groundwater. https://doi.org/10.1111/gwat.12644

Gemail, K. S., Weller, A., & Hördt, A. (2011). Estimating hydraulic conductivity using geoelectrical measurements: Theory and application. Hydrogeology Journal, 19(1), 251–262. https://doi.org/10.1007/s10040-010-0661-3

George, N. J., Akpan, A. E., & Ekanem, A. M. (2017). Estimation of aquifer hydraulic characteristics using geoelectric sounding data in southern Nigeria. Arabian Journal of Geosciences, 10, 91. https://doi.org/10.1007/s12517-017-2889-3

George, N. J., Ekanem, A. M., Akpan, A. E., & George, A. M. (2014). Geoelectrical evaluation and hydrochemical characterization of aquifer units in parts of southern Nigeria. Hydrogeology Journal, 22, 571–588.

Gheorghe, A. (1978). A processing and synthesis of hydrogeological data. Abacus Press.

Hasanuzzaman, M., Mandal, M. H., Hasnine, M., Shit, P. K., Bhunia, G. S., & others. (2022). Groundwater potential mapping using multi-criteria decision, bivariate statistic and machine learning algorithms: Evidence from Chota Nagpur Plateau, India. Applied Water Science, 12, 58. https://doi.org/10.1007/s13201-022-01584-9

Ibanga, J. I., & George, N. J. (2016). Estimating geohydraulic parameters, protective strength, and corrosivity of hydrogeological units: A case study of ALSCON, Ikot Abasi, Southern Nigeria. Arabian Journal of Geosciences, 9(363). https://doi.org/10.1007/s12517-016-2390-1

Jasmin, I. R., & Mallikarjuna, P. (2014). Groundwater potential zone identification using geoinformatics techniques in Vaniyar sub-basin, Ponnaiyar River, South India. Egyptian Journal of Remote Sensing and Space Science, 17(2), 146–160. https://doi.org/10.1016/j.ejrs.2014.09.002

Jha, M. K., Chowdary, V. M., & Chowdhury, A. (2007). Groundwater management and development by integrated remote sensing and geographic information systems: Prospects and constraints. Water Resources Management, 21(2), 427–467. https://doi.org/10.1007/s11269-006-9024-4

Kogbe, C. A. (1989). Review of the stratigraphy, sedimentation and structure of the Niger Delta. In Geology of Nigeria (2nd ed., pp. 311–324).

Krasny, J. (1993). Classification of natural groundwater resources in fissured rocks on the basis of their transmissivity. Ground Water, 31(2), 230–236.

Obinawu, V. I., Ebeniro, J. O., & Ofoegbu, C. O. (2011). Electrical resistivity investigation for groundwater exploration in the Niger Delta, Nigeria.

Ogbozige, F. J., & Toko, M. A. (2020). Investigation of groundwater flow direction in Port Harcourt, Nigeria. Engineering and Technology Journal, 38(12A), 1744–1750. https://doi.org/10.30684/etj.v38i12A.1754

Olorunfemi, M. O., & Akinwunmi, O. O. (2021). Geoelectric assessment of groundwater potential in Supare Akoko area, southwestern Nigeria. Environmental Energy and Structural Research Journal, 6(2), 45–58.

Pande, C. B., Moharir, K. N., Panneerselvam, B., Singh, S. K., Elbeltagi, A., Pham, Q. B., Varade, A. M., & Rajesh, J. (2021). Delineation of groundwater potential zones for sustainable development and planning using analytical hierarchy process (AHP) and MIF techniques. Applied Water Science, 11, 186. https://doi.org/10.1007/s13201-021-01522-1

Preeja, R., Thomas, J., & Pradeepkumar, A. P. (2011). Morphometric analysis and groundwater potential zonation of Meenachil River Basin, Kerala, India using remote sensing and GIS techniques. Journal of the Geological Society of India, 78, 63–72.

Saaty, T. L. (1980). The analytic hierarchy process: Planning, priority setting, resource allocation. McGraw-Hill.

Short, K. C., & Stauble, A. J. (1967). Outline of the geology of the Niger Delta. AAPG Bulletin, 51(5), 761–779.

Singh, D. N., & Singh, V. S. (2016). Relationship between geoelectrical and hydraulic properties of aquifers in alluvial terrain. Hydrogeology Journal, 24, 245–258.

Tamunobereton-ari, I. J., Edet, A. E., & Okereke, C. S. (2013). Groundwater recharge estimation using soil moisture balance and empirical methods in Akwa Ibom State, Nigeria. Hydrological Sciences Journal, 58(5), 962–974. https:// doi. org/ 10. 1080/ 02626 667. 2013. 782340.

Tamunobereton-ari, I., Omubo-Pepple, V. B., & Amakiri, A. R. C. (2014). Characterization and delineation of aquifer in part of Omoku, Rivers State, Nigeria. IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG), 2(4), 30–37.

Telford, W. M., Geldart, L. P., & Sheriff, R. E. (1990). Applied geophysics (2nd ed.). Cambridge University Press.

Tizro, A. A., Voudouris, K., & Kallioras, A. (2012). Groundwater management using geoelectrical data: A case study from western Iran. Hydrogeology Journal, 20(8), 1493–1505. https://doi.org/10.1007/s10040-012-0892-5

Todd, D. and Mays, L. (2005) Groundwater Hydrology. 3rd Edition, John Wiley and Sons, Inc., Hoboken, 652 p.

UNESCO. (2022). The United Nations World Water Development Report 2022: Groundwater—Making the Invisible Visible. UNESCO World Water Assessment Programme.

Uwa, U. E., Akpabio, G. T., & George, N. J. (2018). Geohydrodynamic parameters and their implications on the coastal conservation: A case study of Abak Local Government Area (LGA), Akwa Ibom State, Southern Nigeria. Natural Resources Research, 28(2), 349–367. https://doi.org/10.1007/s11053-018-9391-6

Wakode, H. B., Baier, K., Jha, R., & Azzam, R. (2018). Impact of urbanization on groundwater recharge and urban water balance for the city of Hyderabad, India. International Soil and Water Conservation Research, 6(1), 51–62. https://doi.org/10.1016/j.iswcr.2017.10.003

Zohdy, A. A. R., Eaton, G. P., & Mabey, D. R. (1974). Application of surface geophysics to ground-water investigations. U.S. Geological Survey Techniques of Water-Resources Investigations, Book 2, Chapter D1.

Published

2026-09-11

How to Cite

Usamat, S., Egbeyale, G. B., Adegbenro, S. A., & Oladipupo, S. A. (2026). Integrated Geoelectrical and Geospatial Assessment of Groundwater Variation  in Selected Location, Port Harcourt, Rivers State, Nigeria. Nigerian Journal of Physics, 35(S), 168-186. https://doi.org/10.62292/njp.v35(s).2026.693

Issue

Vol. 35 No. S (2026): Nigerian Journal of Physics - Vol. 35(S)

Section

Articles
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Copyright (c) 2026 Sulyman Usamat, Godwin Babatunde Egbeyale, Sunday Ajani Adegbenro, Salami A. Oladipupo

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

How to Cite

Usamat, S., Egbeyale, G. B., Adegbenro, S. A., & Oladipupo, S. A. (2026). Integrated Geoelectrical and Geospatial Assessment of Groundwater Variation  in Selected Location, Port Harcourt, Rivers State, Nigeria. Nigerian Journal of Physics, 35(S), 168-186. https://doi.org/10.62292/njp.v35(s).2026.693