Modeling of Geo-Hydraulic Properties from Geophysical and Hydro-Geologic Data in the Imo River Basin, Southeast Nigeria and Similar Geological Formations.

Authors

  • Terhemba Emberga
    Joseph Sarwuan University Makurdi
  • Alexander Opara
    Federal University of Technology Owerri image/svg+xml
  • Tertsea Igbawua
    Joseph Sarwuan University, Makurdi
  • Okwukweka Ndubuaku Okeke
    Alvan Ikoku Federal University of Education
  • Emeka Epuerie
    Federal Polytechnic Nekede image/svg+xml

Keywords:

Aquifer Storativity, Aquifer Transmissivity, Da-Zarrock parameters, Geo – Hydraulic properties, New Model

Abstract

This research aims to develop a unique geophysical model that can forecast aquifer geo-hydraulic features reliably from geophysical and hydro-geologic data in the Imo River Basin, Southeast Nigeria, and related geological Formations. To determine the Dar-Zarrouk characteristics, 569 vertical electrical soundings data were collected and analyzed. Dar-Zarrouk was integrated with the diagnostic association between the K values recorded in reference wells and electrical soundings data for the estimation. In the Ameki Formation, a mean transmissivity Tmean = 193.5 m2/day and a mean storativity 5.54 10-5 were calculated. A mean Transmissivity Tmean of 784 m2/day and a mean Storativity of 5.11 x 10-5 were found in the Benin formation. The mean storativity of the aquifers in the Imo Shale Formation is 3.48 10-5, and the mean transmissivity is 205.2 m2/day. The Ogwasi/Asaba Formation's aquifers have a mean transmissivity Tmean = 100.2 m2/day compared to the Nsukka Formation's aquifers' mean transmissivity Tmean = 211.5 m2/day with a mean storativity of 4.8 10-4. Niwas & Singhal, the Heigold model, and the newly generated geophysical model were used to estimate the hydraulic conductivity in the research area, with average values of 13.19 m/day, 1.74 m/day, and 4.62 m/day, respectively. The aquifer depth in the research region is 115.5m, whereas the average thickness of the aquiferous units is 39.8m. The average aquifer resistivity is 1963.2m and the average aquifer conductivity is 0.00186 sm-1. A comparison of the estimates of hydraulic conductivity obtained through the different methods and generated new model shows that the New Model values are very similar to the existing pumping test data.

Author Biography

Alexander Opara

Department of Geology, Federal University of Technology, Owerri

Dimensions

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Published

2025-09-14

How to Cite

Modeling of Geo-Hydraulic Properties from Geophysical and Hydro-Geologic Data in the Imo River Basin, Southeast Nigeria and Similar Geological Formations. (2025). Nigerian Journal of Applied Physics, 1(1), 65-80. https://doi.org/10.62292/njap-v1i1-2025-6

Issue

Vol. 1 No. 1 (2025): Nigerian Journal of Applied Physics - Vol. 1 No. 1

Section

Articles
Copyright & Licensing

How to Cite

Modeling of Geo-Hydraulic Properties from Geophysical and Hydro-Geologic Data in the Imo River Basin, Southeast Nigeria and Similar Geological Formations. (2025). Nigerian Journal of Applied Physics, 1(1), 65-80. https://doi.org/10.62292/njap-v1i1-2025-6