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DOI	10.5194/hess-24-189-2020
	Flooding in the Mekong Delta: The impact of dyke systems on downstream hydrodynamics
	Quoc Thanh V.; Roelvink D.; Van Der Wegen M.; Reyns J.; Reyns J.; Kernkamp H.; Van Vinh G.; Thi Phuong Linh V.
发表日期	2020
ISSN	1027-5606
起始页码	189
结束页码	212
卷号	24 期号:1
英文摘要	Building high dykes is a common measure of coping with floods and plays an important role in agricultural management in the Vietnamese Mekong Delta. However, the construction of high dykes causes considerable changes in hydrodynamics of the Mekong River. This paper aims to assess the impact of the high-dyke system on water level fluctuations and tidal propagation in the Mekong River branches. We developed a coupled 1-D to 2-D unstructured grid using Delft3D Flexible Mesh software. The model domain covered the Mekong Delta extending to the East (South China Sea) and West (Gulf of Thailand) seas, while the scenarios included the presence of high dykes in the Long Xuyen Quadrangle (LXQ), the Plain of Reeds (PoR) and the Trans-Bassac regions. The model was calibrated for the year 2000 high-flow season. Results show that the inclusion of high dykes changes the percentages of seaward outflow through the different Mekong branches and slightly redistributes flow over the low-flow and high-flow seasons. The LXQ and PoR high dykes result in an increase in the daily mean water levels and a decrease in the tidal amplitudes in their adjacent river branches. Moreover, the different high-dyke systems not only have an influence on the hydrodynamics in their own branch, but also influence other branches due to the Vam Nao connecting channel. These conclusions also hold for the extreme flood scenarios of 1981 and 1991 that had larger peak flows but smaller flood volumes. Peak flood water levels in the Mekong Delta in 1981 and 1991 are comparable to the 2000 flood as peak floods decrease and elongate due to upstream flooding in Cambodia. Future studies will focus on sediment pathways and distribution as well as climate change impact assessment. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	Climate change; Floods; Hydrodynamics; Water levels; Agricultural management; Climate change impact assessments; Gulf of Thailand; Mean water levels; Tidal propagation; Unstructured grid; Upstream flooding; Water-level fluctuation; Rivers; agricultural management; climate change; dike; flood; flooding; hydrodynamics; outflow; peak flow; Cambodia; Gulf of Thailand; Mekong Delta; Mekong River; Pacific Ocean; South China Sea; South China Sea; Thailand; Viet Nam
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159523
作者单位	Quoc Thanh, V., Department of Water Science and Engineering, IHE Delft, Delft, Netherlands; Roelvink, D., Department of Water Science and Engineering, IHE Delft, Delft, Netherlands, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands, College of Environment and Natural Resources, Can Tho University, Can Tho City, Viet Nam; Van Der Wegen, M., Department of Water Science and Engineering, IHE Delft, Delft, Netherlands, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands, Deltares, Delft, Netherlands; Reyns, J., Department of Water Science and Engineering, IHE Delft, Delft, Netherlands, Deltares, Delft, Netherlands, Deltares, Delft, Netherlands; Reyns, J., Department of Water Science and Engineering, IHE Delft, Delft, Netherlands, Deltares, Delft, Netherlands, Deltares, Delft, Netherlands; Kernkamp, H., Deltares, Delft, Netherlands; Van Vinh, G., Cuu Long River Hydrological Center, Southern Regional Hydro-Meteorological ...
推荐引用方式 GB/T 7714	Quoc Thanh V.,Roelvink D.,Van Der Wegen M.,et al. Flooding in the Mekong Delta: The impact of dyke systems on downstream hydrodynamics[J],2020,24(1).
APA	Quoc Thanh V..,Roelvink D..,Van Der Wegen M..,Reyns J..,Reyns J..,...&Thi Phuong Linh V..(2020).Flooding in the Mekong Delta: The impact of dyke systems on downstream hydrodynamics.Hydrology and Earth System Sciences,24(1).
MLA	Quoc Thanh V.,et al."Flooding in the Mekong Delta: The impact of dyke systems on downstream hydrodynamics".Hydrology and Earth System Sciences 24.1(2020).