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Article

Assessment of Hydrology and Sediment Yield in the Mekong River Basin Using SWAT Model

1
Faculty of Hydrology and Water Resources Engineering, Institute of Technology of Cambodia, Russian Federation Blvd., P.O. BOX 86, Phnom Penh 12156, Cambodia
2
Laboratoire Ecologie Fonctionnelle et Environnement, UMR 5245 CNRS/UPS/INPT ENSAT, Avenue de l’Agrobiopole, BP 32607, Auzeville Tolosane, 31326 Castanet Tolosan, France
*
Authors to whom correspondence should be addressed.
Water 2020, 12(12), 3503; https://doi.org/10.3390/w12123503
Received: 6 November 2020 / Revised: 4 December 2020 / Accepted: 10 December 2020 / Published: 13 December 2020
(This article belongs to the Special Issue Fluvial Processes and Denudation)
The Mekong River Basin (MRB) in Southeast Asia is among the world’s ten largest rivers, both in terms of its discharge and sediment load. The spatial and temporal resolution to accurately determine the sediment load/yield from tributaries and sub-basin that enters the Mekong mainstream still lacks from the large-scale model. In this study, the SWAT model was applied to the MRB to assess long-term basin hydrology and to quantify the sediment load and spatial sediment yield in the MRB. The model was calibrated and validated (1985–2016) at a monthly time step. The overall proportions of streamflow in the Mekong River were 34% from surface runoff, 21% from lateral flow, 45% from groundwater contribution. The average annual sediments yield presented 1295 t/km2/year in the upper part of the basin, 218 t/km2/year in the middle, 78 t/km2/year in the intensive agricultural area and 138 t/km2/year in the highland area in the lower part. The annual average sediment yield for the Mekong River was 310 t/km2/year from upper 80% of the total MRB before entering the delta. The derived sediment yield and a spatial soil erosion map can explicitly illustrate the identification and prioritization of the critical soil erosion-prone areas of the MR sub-basins. View Full-Text
Keywords: SWAT; hydrology; sediment yield; Mekong River SWAT; hydrology; sediment yield; Mekong River
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MDPI and ACS Style

Sok, T.; Oeurng, C.; Ich, I.; Sauvage, S.; Miguel Sánchez-Pérez, J. Assessment of Hydrology and Sediment Yield in the Mekong River Basin Using SWAT Model. Water 2020, 12, 3503. https://doi.org/10.3390/w12123503

AMA Style

Sok T, Oeurng C, Ich I, Sauvage S, Miguel Sánchez-Pérez J. Assessment of Hydrology and Sediment Yield in the Mekong River Basin Using SWAT Model. Water. 2020; 12(12):3503. https://doi.org/10.3390/w12123503

Chicago/Turabian Style

Sok, Ty; Oeurng, Chantha; Ich, Ilan; Sauvage, Sabine; Miguel Sánchez-Pérez, José. 2020. "Assessment of Hydrology and Sediment Yield in the Mekong River Basin Using SWAT Model" Water 12, no. 12: 3503. https://doi.org/10.3390/w12123503

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