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Article Information:
Determination of Aquifer Protective Capacity and Corrosivity of Near Surface Materials in Yenagoa City, Nigeria
K.S. Okiongbo, E. Akpofure and E. Odubo
Corresponding Author: Kenneth S. Okiongbo
Submitted: 2011 June, 04
Accepted: 2011 July, 02
Published: 2011 August, 30 |
Abstract:
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Geoelectrical sounding method was adopted in the evaluation of aquifer protective capacity and
corrosivity of near surface materials in Yenagoa city, South South, Nigeria. A total of eleven Vertical Electrical
Soundings (VES) stations were occupied using the Schlumberger configuration. Five geoelectric layers were
identified. Layers four and five are the likely aquiferous horizons with resistivities >280 Sm. The depth to the
aquiferous horizon varied between 6.0-52.0 m, and has a rather irregular distribution and thickness. Corrosivity,
isopach and longitudinal unit conductance (S) maps were generated from the combination of first and second
order geoelectric parameters. The results indicate that the INC and Opolo areas of the city are characterized by
weak protective capacity (0.1-0.2 mhos) while other locations investigated are underlain by materials which
could be regarded as moderate (0.2-0.69 mhos) to good (0.7-4.9 mhos) protective capacity. Resistivity values
within the second layer (11.0-53.0 Sm) indicate that this layer is moderately aggressive and may likely form
corrosion cells which may lead to significant corrosion failures of shallow subsurface piping facilities. The
results of this study highlight a set of environmental factors (corrosivity and protective capacity) that should
not be ignored at the planning stages of residential and industrial estates.
Key words: Corrosivity, geoelectric, isopach, longitudinal unit conductance, resistivity, transverse unit resistance,
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Cite this Reference:
K.S. Okiongbo, E. Akpofure and E. Odubo, . Determination of Aquifer Protective Capacity and Corrosivity of Near Surface Materials in Yenagoa City, Nigeria. Research Journal of Applied Sciences, Engineering and Technology, (08): 785-791.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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