Two-Dimensional Numerical Simulation of the Hydro-Sedimentary Phenomena in Lake Taabo, Côte d’Ivoire

Kouakou Kouassı (), Kouassi Kouame, Kouakou Konan, Martin Sanchez Angulo, Moussa Deme and N’Diaye Meledje

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), 2013, vol. 27, issue 12, 4379-4394

Abstract: In Côte d’Ivoire, most of the reservoirs built to improve water supply, electricity, agriculture and cattle no longer work because of silt deposits and euthrophication. This study aims at modeling the hydro-sedimentary functioning of Lake Taabo in order to understand the sedimentation phenomena taking place. In this survey, 204 water samples and 31 bottom sediment samples were taken, during different hydrological seasons, to estimate suspended sediment concentrations and characterize the bottom sediments of Lake Taabo. The study showed that suspended solid variations are related to hydrological seasons. During dry seasons, the lake is lightly loaded; the average concentration is 7.89 mg/L. At the other end of the scale, during rainy seasons, suspended sediment concentrations increase and the average concentration is around 16.30 mg/L. The bottom of the reservoir mostly consists of mud. Sands are found near the islands and the dam. Sand size varies from medium grain to coarse. The average grain size is 451.48 μm. The hydro-sedimentary environment of Lake Taabo was simulated by a transport model, coupled with a hydrodynamic model. The various simulation scenarios indicated that Lake Taabo is subject to 20 to 60 mm of annual deposits. The greater thicknesses were observed near the spillway and the power intake. Copyright Springer Science+Business Media Dordrecht 2013

Keywords: Solid transport; Sedimentation; Modeling; Reservoir; Lake Taabo; Côte d’Ivoire (search for similar items in EconPapers)
Date: 2013
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DOI: 10.1007/s11269-013-0417-x

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