Share This Article:

Structural mapping of coastal plain sands using engineering geophysical technique: Lagos Nigeria case study

Abstract Full-Text HTML Download Download as PDF (Size:2140KB) PP. 2-9
DOI: 10.4236/ns.2009.11002    4,394 Downloads   9,635 Views   Citations

ABSTRACT

An engineering geological survey using the cone penetrometer and finite element method was carried out to characterize sand-fill thick- nesses in a reclaimed area of Lagos, SW Nigeria. A previously developed finite element program was modified in order to allow for predicting the sand-fill thicknesses, and have an unders- tanding of the geomorphic shallow structures existing pre-sand-fill. The program was tested using the obtained cone penetrometer test re-sults from the Lekki-Peninsula area. The finite element predicted thicknesses show good cor-relation with the penetrometer obtained thicknesses. Six zones with thick sand-fill thick-nesses varying from 1.25 to 6.0m were identified from the isopach maps, these zones correlate with major/minor depression associated with river/stream channels and creeks. These are the main shallow geomorphic structural features present in the area pre-sand fill. The structural trends of the depressions are largely influenced by the oceanic fracture pattern.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Adepelumi, A. , Olorunfemi, M. , Falebita, D. and Bayowa, O. (2009) Structural mapping of coastal plain sands using engineering geophysical technique: Lagos Nigeria case study. Natural Science, 1, 2-9. doi: 10.4236/ns.2009.11002.

References

[1] Adepelumi, A. A. and Olorunfemi, M. O. (2000) Engi-neering geological and geophysical investigation inves-tigation of the reclaimed Lekki Peninsula, Lagos, Southwest Nigeria. Bulletin of Engineering, Geology and the Environment, 58, 125-132.
[2] Kearey, P. and Brooks, M. (1984) An introduction to geophysical exploration. Blackwell Scientific Publication, Oxford, 198-217.
[3] Olorunfemi, M. O. and Mesida, A. (1987) Engineering geophysics and its application in engineering site inves-tigations (Case study from Ile-Ife area). The Nigerian Engineering, 22(2), 57-66.
[4] Olorunfemi, M. O. and Okhue, E. T. (1992) Hydro-geologic and geologic significance of a geoelectric sur-vey at Ile-Ife, Nigeria. Journal of Mining and Geology, 28(2), 221-229.
[5] Fenner, R. (1975) Finite element method for engineers. Macmillan Press Ltd. London, 171-171.
[6] Agbede, A. A. (1981) The finite element analysis of the opa river dam. Unpublished M. Sc. Thesis, Obafemi Awolowo University, Ile-Ife, 32-32.
[7] Wang, H. F. and Anderson, M. P. (1982) Groundwater modelling with finite difference and finite element methods. Elsevier Publishing, Amsterdam, 1-137.
[8] Buchanan K. M. and Pugh J. C. (1955) Land and people in Nigeria: The human geography of Nigeria and its en-vironmental background. London, University of London Press.
[9] Webb J. E. and Hill M. B. (1958) Ecology of Lagos la-goons (II): The topography and physical features of La-gos harbor & Lagos lagoons. Philosophical Transaction of Royal Society, London, B24, 319-333.
[10] Durotoye, A. B. (1975) Quaternary sediments in Nigeria. Geology of Nigeria, Elizabeth Press, Lagos, 431-451.
[11] Bureau de Recherches Geologiques et Minieres (1979) Pre-drilling hydrogeological report area 18 and 19 sub-mitted to the Federal Department of Water Resources, Lagos, Nigera, 1-60.
[12] Sanglerat, G. (1972) The penetration and soil exploration. Development in geotechnical engineering, Elsevier Sci-entific Publishing, New York, 52-80.
[13] De Rutter, J. (1981) Current penetrometer practice. American Society of Civil Engineers Convention, St. Louis, State of the Art report, Session 35, 64-64.
[14] Scott, C. R. (1969) An introduction to soil mechanics and foundations. Applied Science Publishers Ltd, London, 379-399.
[15] Emery, K. O. E., Uchupi, J. P., Bowin, C. and Mascle, J. (1975) Continental margin off western Africa-Angola to Sierra Leone. American Association of Petroleum Ge-ologist Bulletin, 59, 2209-2265.

  
comments powered by Disqus

Copyright © 2018 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.