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ARPN Journal of Science and Technology >> Volume 7, Issue 1, January 2017

ARPN Journal of Science and Technology


Aquifer Hydraulic Conductivity Determination from Grain Size Analysis in Parts of Old Port Harcourt Township, Nigeria

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Author H.O Nwankwoala
ISSN 2225-7217
On Pages 972-981
Volume No. 3
Issue No. 9
Issue Date October 01, 2013
Publishing Date October 01, 2013
Keywords Hydraulic conductivity, Aquifers, Grain size analysis, Boreholes, Port Harcourt



Abstract

This study aims at the determination of aquifer hydraulic conductivity from grain size analysis in parts of Port Harcourt, Nigeria. Laboratory analysis of soil and aquifer materials tests were carried out on soil samples from some boreholes based on British Standards and ASTM standards. The hydraulic conductivity calculated from Hazen formula. Hydraulic conductivity (K) values for Boreholes are: Churchill Road, BH-1 (3.24 x 10-3cm/sec); Borokiri Sand fill, BH-2 (3.62 x 10-3cm/sec); Marine Base, BH-3 (9.61 x 10-3cm/sec); Aggrey Road, BH-4 (8.41 x 10-3cm/sec); Reclamation Road, BH-5 (2.2 x 10-3cm/sec) and Harold Wilson Drive, BH-6 (4.0 x 10-3cm/sec), respectively. These values are high within the typical permeability values for fine to coarse sand to gravel. The implication of high K values is that the aquifer is prolific, hence have very good water transmitting properties and can sustain withdrawal of regional importance. Based on the results obtained, all of the boreholes appraised in this work can sustain water supply needs of the rapidly urbanizing, densely populated old Port Harcourt area. Concern should only be shown in its management so that no undesirable consequence of un-harmonized withdrawal is induced.


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