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2011 (Vol. 3, Issue: 08)
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 

Key words:  Corrosivity, geoelectric, isopach, longitudinal unit conductance, resistivity, transverse unit resistance,
Vol. 3 , (08): 785-791
Submitted Accepted Published
2011 June, 04 2011 July, 02 2011 August, 30
Abstract:

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.
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  Cite this Reference:
K.S. Okiongbo, E. Akpofure and E. Odubo, 2011. Determination of Aquifer Protective Capacity and Corrosivity of Near Surface Materials in Yenagoa City, Nigeria.  Research Journal of Applied Sciences, Engineering and Technology, 3(08): 785-791.
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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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