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

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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.

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Acknowledgments

The authors acknowledge the financial and logistical support of the International Foundation for Science (IFS, Sweden) and the Ivorian Electrical Power Company (CIE).

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Authors and Affiliations

  1. Centre de Recherche en Ecologie, Université Nangui Abrogoua, 08 BP 109, Abidjan, 08, Côte d’Ivoire

    Kouakou Lazare Kouassı, Kouassi Innocent Kouame & N’Diaye Hermann Edwige Meledje

  2. Université Jean LOROUGNON GUEDE, Daloa, Côte d’Ivoire

    Kouakou Séraphin Konan

  3. Laboratoire de Planétologie et Géodynamique, Université de Nantes, Faculté des Sciences et des Techniques, Nantes, France

    Martin Sanchez Angulo

  4. Département Infrastructures et Transport, Institut National Polytechnique Félix HOUPHOUËT-BOIGNY, Yamoussoukro, Côte d’Ivoire

    Moussa Deme

Authors
  1. Kouakou Lazare Kouassı
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  2. Kouassi Innocent Kouame
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  3. Kouakou Séraphin Konan
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  4. Martin Sanchez Angulo
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  5. Moussa Deme
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  6. N’Diaye Hermann Edwige Meledje
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Correspondence to Kouakou Lazare Kouassı.

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Kouassı, K.L., Kouame, K.I., Konan, K.S. et al. Two-Dimensional Numerical Simulation of the Hydro-Sedimentary Phenomena in Lake Taabo, Côte d’Ivoire. Water Resour Manage 27, 4379–4394 (2013). https://doi.org/10.1007/s11269-013-0417-x

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  • DOI: https://doi.org/10.1007/s11269-013-0417-x

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