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Journal of Emerging Trends in Engineering and Applied Sciences (JETEAS)

ISSN:2141-7016

Article Title: Geoelectric Appraisal of Aquifer Contamination Risks within the Campus of Federal University of Technology, Akure Southwestern Nigeria
by Oladapo, Michael Ilesanmi and Omotola, Olubunmi Oluwatoyin

Abstract:
One hundred and fourteen (114) Schlumberger geoelectric soundings were undertaken within The Federal University of Technology, Akure campus with the aim of appraising the risk of aquifer contamination. The campus is underlain by the Precambrian Crystalline Basement Complex rocks. Interpretations of the data indicate subsurface sequence comprising the topsoil, variably thick weathered/fractured basement and the resistive basement. The weathered and fractured basement rock columns constitute aquifer units in the campus. Weathered basement aquifers were delineated on the northwestern, north central and eastern areas while fractured basement aquifers were delineated on the western, northern and southeastern areas with the major aquifer units situated on the western and north central flanks. The total longitudinal unit conductance values (0.0242 ? S ? 1.0297) utilized for contamination risk rating show that the aquifers underlying the northwest (Vice Chancellors lodge), northeast (Junior Staff Quarters) and southeast (Oba-Kekere) areas are at risk of low contamination (0.7 ? S ? 1.029 mhos). Kachalla village on the western flank and North Gate/Sports Complex in the north central zone are characterized by 0.2 ? S ? 0.69 mhos indicative of some contamination risk. High levels of contamination risks (0.1 ? S ? 0.19) are prevalent in the central and southern areas. Cathodic protection units should constitute integral part of buried metallic utilities in areas of high corrosivity (13 < ?2 < 180 ?-m) identified in the central, southern and northwestern flanks. The coefficient of anisotropy variation (1.001 ? ? ? 1.96) enhanced the delineation of lithologic contacts that are hydrogeologically favourable but may constitute migratory pathways for contaminants.
Keywords: geoelectric soundings, aquifer, contamination risk, protective capacity, corrosivity
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ISSN: 2141-7016

Editor in Chief.

Prof. Gui Yun Tian
Professor of Sensor Technologies
School of Electrical, Electronic and Computer Engineering
University of Newcastle
United Kingdom

 

 

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