Hydrogeology of Lagos metropolis
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Date
1987
Authors
Longe, E.O.
Malomo, S.
Olorunniwo, M.A.
Journal Title
Journal ISSN
Volume Title
Publisher
Pergamons Journal Ltd
Abstract
A study of the groundwater resources and aquifers underlying Lagos metropolis has been made. This
is based on well-logs, pumping tests, well-production and water quality data. The data were obtained during
construction and use of recent boreholes of the Lagos State mini water works programme.
The sub-surface geology indicates a complex lithology of alternating sequence of sand and clay deposits. Three aquifer horizons were delineated. The first, a water table aquifer (average thickness of 8 m) is mostly exploited through dug wells. The other two, confined aquifers (thicknesses of 10-25 and 10-35m respectively), are harnessed through boreholes and are the basis of the mini water works.
Average values of transmissivity (T) and storage coefficients (S) are 3.53 x 10-3 m2 s-1 and 2.95 x 10-4
respectively for the second and 17.44 × 10-3 m2 s-1 and 3.29 x 10-4 for the third. The range of transmissivity,
the storage coefficient and also permeability indicate considerable inhomogeneity in the aquifers.
Chemical quality determinations show that the harnessed aquifers waters are generally soft. They are suitable for use in domestic, agricultural and industrial processes, if the excessive iron occurring is removed.
Description
Scholarly article
Keywords
Hydrogeology , Aquifer , Metroplis , Aquifer horizons , Research Subject Categories::TECHNOLOGY
Citation
Longe, E.O., Malomo, S., and Olorunniwo, M.A., (1987). Hydrogeology of Lagos metropolis. Journal of African Earth Sci., 6(3), 163-174.