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Journal of Environmental Hydrology
ISSN 1058-3912 |
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Electronic Journal of the International Association for
Environmental Hydrology
JEH Volume 15 (2007), Paper 22 Posted October 22, 2007 GRAIN SIZE CHARACTERISTICS OF OVER BANK DEPOSITS ON THE FLOODPLAIN OF THE OPA RESERVOIR BASIN, SOUTHWESTERN NIGERIA
A. Adediji ABSTRACT Little or no information exists in Nigeria on the grain size composition of the over bank deposits that dominate the river floodplains. This study examines the grain size composition of the over bank deposits of the floodplains of three rivers in the Opa Reservoir Basin, southwestern Nigeria. A total of 200 core bulk sediments were collected from the floodplain reaches of the three rivers and their grain size distribution was determined. The data were subjected to attest statistics. The results showed variability in the grain size composition (% sand, % clay and % silt) both along (longitudinally) and within the floodplain reaches of the three rivers. The difference in grain size distribution was found to be significant at a=0.05 in two out of the three rivers. The variation in the grain size composition of the over bank deposits of the study floodplain reaches was significant at the 95% confidence level. Reference: Adediji, A., and O. Oluwafemi. 2007. Grain size characteristics of over bank deposits on the floodplain of the Opa Reservoir Basin, southwestern Nigeria. Journal of Environmental Hydrology, Vol. 15, Paper 22. CONTACT: A. Adediji Department Of Geography Obafemi Awolowo University Ile-Ife, Nigeria E-mail: remiadediji2003@yahoo.co.uk |
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