Assessment of the Leachate Contamination Level of Groundwater Resource at a Dumpsite, In Minna, North Central, Nigeria Using Resistivity Method

Authors

  • Priscillia Egbelelulu Department of Physics, University of Abuja, Abuja
  • Taiwo Adewumi Department of Physics, Federal University Lafia, Nasarawa State
  • Emmanuel Emeka Udensi Department of Physics, Federal University of Technology Minna.
  • Naeem Abdulsalam Department of Physics, University of Abuja, Abuja
  • Oke Israel Okwokwo Department of Physics, University of Abuja, Abuja

DOI:

https://doi.org/10.25299/jgeet.2019.4.2.2159

Keywords:

Contaminant, Dumpsite, Electrical Resistivity, Leachate, Plumes

Abstract

This research work focused on the use of direct current resistivity method to analyse data collected from refuse dumpsite at eastern bye pass Minna. The study area lies approximately on longitude 60 36’19.84”E to 6036’23.15”E and latitude 90 38’04.97”N to 9038’08.25”N, with a dimension of 100m x 100m within the basement complex of north central Nigeria. Vertical Electrical Sounding was carried out on the dumpsite with the aim of delineating the leachate contaminant plumes using resistivity method. Nine electrical resistivity profiles were measured on the site. Six transverse profiles were conducted on the dumpsite with thirty-six vertical electrical sounding (VES) point, three transverse profiles was also conducted on the control site which is 100 meters away from the dumpsite having nine vertical electrical sounding (VES) point and a dimension of 40m x 40m. The resistivity data obtained was analyzed using winresist software. The data obtained from the study area revealed three underlain layer they are the topsoil, fractured basement and fresh basement. The dumpsite was typified by A-types and H-types of curve and the control site was typified by H-type of curves. Iso–resistivity maps at various depths were observed, at the surface, 3m, 5m,7m, and 10m for the dumpsite and the control site. It can therefore be inferred from this study that the depth of contamination is 7 meter and aquifer found within this depth are most likely to be contaminated by leachate and water bearing formation beyond the depth of 7m is safe from contamination. The rate of contamination of the study area is approximately 1.0 meter per year.

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Author Biography

Emmanuel Emeka Udensi, Department of Physics, Federal University of Technology Minna.

He is a professor of applied geophysics in the Department of Physics, Federal University of  Technology, Minna

References

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Published

2019-06-30

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