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Abdul-Rahman Dirisu, John Ovie Olomukoro and Ifeanyi Maxwell Ezenwa


This study assessed the physico-chemical status of sediments in the Agbede Wetlands with the aim to create a reference archive for the Edo North catchment and to further identify the characteristics mostly influenced by the natural and anthropogenic activities going on at the watershed. Nutrients, zinc, nickel and lead were identified to be mostly of anthropogenic origin, while alkali metals and alkaline earth metals were from both anthropogenic and natural sources. The clustering of stations 1 and 4 indicates that the sediment quality in the lentic systems was not completely excluded from the lotic system, suggesting that principal component analysis (PCA) and cluster analysis (CA) techniques are invaluable tools for identifying factors influencing the sediment quality. The mean values of the particle size distribution were in the following order across the ecosystems: sand (61.86–80.53%) > silt (9.75–30.34%) > clay (7.83–13.89%). The contamination of the water bodies was primarily derived from agricultural run-offs and through geochemical weathering of the top soils. Therefore, our analysis indicates that the concentrations of cations, anions and nutrients in the sediments of the lotic and lentic ecosystems in Agbede Wetlands are not at an alarming level.

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Muhammad Shafique

urban hydrology and its consequences for receiving waters: A state of the art. Adv. Water Resour; 51 , 261–279. [4] National Research Council. 2009. Urban storm water management in the United States , The National Academies, Washington, D.C. [5] Kaushal, S.S., Belt, K.T. (2012): The urban watershed continuum: Evolving spatial and temporal dimensions. Urban Ecosyst; 15 , 409–435. [6] Nelson, E.J., Booth, D.B. (2002): Sediment sources in an urbanizing, mixed land-use watershed. J. Hydrol; 264 , 51–68. [7] Carey, R.O., Hochmuth, G.J., Martinez

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N. Varadarajan and B.K. Purandara

.K., Venkatesh, B., Varadarajan, N. (1997): Water Logging problems in canal commands of Hard Rock region. In: Proceedings of Brain Storming Session on Hydrological problems of Hard Rock Region, organized by NIH, Belgaum on15th March, 1997, pp. 1-4. [4] Dilip, G.D., Varadarajan, N., Purandara, B.K. (2002): Mapping of Groundwater Quality Parameters in GIS Environment. In: Proceedings on International Conference on Hydrology and Watershed Management held at Jawaharlal Nehru Technological University, Hyderabad during 18-20 December, pp. 568-577. [5