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Water
Volume 13
Issue 10
10.3390/w13101388
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Article

Sediment Balance Estimation of the ‘Cuvette Centrale’ of the Congo River Basin Using the SWAT Hydrological Model

by
Pankyes Datok
1,*,
Sabine Sauvage
1,*,
Clément Fabre
2,
Alain Laraque
3,
Sylvain Ouillon
4,5,
Guy Moukandi N’kaya
6 and
José-Miguel Sanchez-Perez
1
1
Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, CNRS, INPT, UPS, 31326 Toulouse, France
2
Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH-8600 Dübendorf, Switzerland
3
GET, UMR CNRS/IRD/UPS, 31400 Toulouse, France
4
LEGOS, Université de Toulouse, IRD, CNRS, CNES, UPS, 31400 Toulouse, France
5
USTH, Vietnam Academy of Science and Technology (VAST), Hanoi 100000, Vietnam
6
LMEI/CUSI/ENSP/Université Marien Ngouabi, Brazzaville BP 69, Congo
*
Authors to whom correspondence should be addressed.
Academic Editor: Bommanna Krishnappan
Water 2021, 13(10), 1388; https://doi.org/10.3390/w13101388
Received: 20 April 2021 / Revised: 13 May 2021 / Accepted: 14 May 2021 / Published: 16 May 2021
(This article belongs to the Special Issue Modelling of River Flows, Sediment and Contaminants Transport)
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Abstract

In this study, the SWAT hydrological model was used to estimate the sediment yields in the principal drainage basins of the Congo River Basin. The model was run for the 2000–2012 period and calibrated using measured values obtained at the basins principal gauging station that controls 98% of the basin area. Sediment yield rates of 4.01, 5.91, 7.88 and 8.68 t km−2 yr−1 were estimated for the areas upstream of the Ubangi at Bangui, Sangha at Ouesso, Lualaba at Kisangani, and Kasai at Kuto-Moke, respectively—the first three of which supply the Cuvette Centrale. The loads contributed into the Cuvette Centrale by eight tributaries were estimated to be worth 0.04, 0.07, 0.09, 0.18, 0.94, 1.50, 1.60, and 26.98 × 106 t yr−1 from the Likouala Mossaka at Makoua, Likouala aux Herbes at Botouali, Kouyou at Linnegue, Alima at Tchikapika, Sangha at Ouesso, Ubangi at Mongoumba, Ruki at Bokuma and Congo at Mbandaka, respectively. The upper Congo supplies up to 85% of the fluxes in the Cuvette Centrale, with the Ubangi and the Ruki contributing approximately 5% each. The Cuvette Centrale acts like a big sink trapping up to 23 megatons of sediment produced upstream (75%) annually. View Full-Text
Keywords: Congo River Basin; Cuvette Centrale; erosion; sediment transport; sediment balance; SWAT Congo River Basin; Cuvette Centrale; erosion; sediment transport; sediment balance; SWAT
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MDPI and ACS Style

Datok, P.; Sauvage, S.; Fabre, C.; Laraque, A.; Ouillon, S.; Moukandi N’kaya, G.; Sanchez-Perez, J.-M. Sediment Balance Estimation of the ‘Cuvette Centrale’ of the Congo River Basin Using the SWAT Hydrological Model. Water 2021, 13, 1388. https://doi.org/10.3390/w13101388

AMA Style

Datok P, Sauvage S, Fabre C, Laraque A, Ouillon S, Moukandi N’kaya G, Sanchez-Perez J-M. Sediment Balance Estimation of the ‘Cuvette Centrale’ of the Congo River Basin Using the SWAT Hydrological Model. Water. 2021; 13(10):1388. https://doi.org/10.3390/w13101388

Chicago/Turabian Style

Datok, Pankyes, Sabine Sauvage, Clément Fabre, Alain Laraque, Sylvain Ouillon, Guy Moukandi N’kaya, and José-Miguel Sanchez-Perez. 2021. "Sediment Balance Estimation of the ‘Cuvette Centrale’ of the Congo River Basin Using the SWAT Hydrological Model" Water 13, no. 10: 1388. https://doi.org/10.3390/w13101388

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