气候变化领域集成服务门户(CCPortal): Assessing impacts of dike construction on the flood dynamics of the Mekong Delta

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DOI	10.5194/hess-22-1875-2018
	Assessing impacts of dike construction on the flood dynamics of the Mekong Delta
	Duc Tran D.; Van Halsema G.; Hellegers P.J.G.J.; Phi Hoang L.; Quang Tran T.; Kummu M.; Ludwig F.
发表日期	2018
ISSN	1027-5606
起始页码	1875
结束页码	1896
卷号	22 期号:3
英文摘要	Recent flood dynamics of the Mekong Delta have raised concerns about an increased flood risk downstream in the Vietnamese Mekong Delta. Accelerated high dike building on the floodplains of the upper delta to allow triple cropping of rice has been linked to higher river water levels in the downstream city of Can Tho. This paper assesses the hydraulic impacts of upstream dike construction on the flood hazard downstream in the Vietnamese Mekong Delta. We combined the existing one-dimensional (1-D) Mekong Delta hydrodynamic model with a quasi-two-dimensional (2-D) approach. First we calibrated and validated the model using flood data from 2011 and 2013. We then applied the model to explore the downstream water dynamics under various scenarios of high dike construction in An Giang Province and the Long Xuyen Quadrangle. Calculations of water balances allowed us to trace the propagation and distribution of flood volumes over the delta under the different scenarios. Model results indicate that extensive construction of high dikes on the upstream floodplains has had limited effect on peak river water levels downstream in Can Tho. Instead, the model shows that the impacts of dike construction, in terms of peak river water levels, are concentrated and amplified in the upstream reaches of the delta. According to our water balance analysis, river water levels in Can Tho have remained relatively stable, as greater volumes of floodwater have been diverted away from the Long Xuyen Quadrangle than the retention volume lost due to dike construction. Our findings expand on previous work on the impacts of water control infrastructure on flood risk and floodwater regimes across the delta. © Author(s) 2018.
语种	英语
scopus关键词	Dynamics; Floods; Hydraulic structures; Levees; Water levels; Water resources; Dike construction; Hydraulic impacts; Hydrodynamic model; Two Dimensional (2 D); Water balance; Water balance analysis; Water control; Water dynamics; Rivers; assessment method; dike; environmental impact assessment; flood; floodplain; hydrodynamics; model validation; one-dimensional modeling; rice; risk assessment; river water; water budget; An Giang; Can Tho; Mekong Delta; 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/160079
作者单位	Duc Tran, D., Water Resources Management Group, Wageningen University, P.O. Box 47, Wageningen, 6700 AA, Netherlands, Centre of Water Management and Climate Change, Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Viet Nam; Van Halsema, G., Water Resources Management Group, Wageningen University, P.O. Box 47, Wageningen, 6700 AA, Netherlands; Hellegers, P.J.G.J., Water Resources Management Group, Wageningen University, P.O. Box 47, Wageningen, 6700 AA, Netherlands; Phi Hoang, L., Water Systems and Global Change Group, Wageningen University, P.O. Box 47, Wageningen, 6700 AA, Netherlands; Quang Tran, T., Southern Institute for Water Resources Planning, 271 An Duong Vuong Street, District 5, Ho Chi Minh City, Viet Nam; Kummu, M., Water and Development Research Group, Aalto University, P.O. Box 15200, Aalto, Finland; Ludwig, F., Water Systems and Global Change Group, Wageningen University, P.O. Box 47, Wageningen, 6700 AA, Netherlands
推荐引用方式 GB/T 7714	Duc Tran D.,Van Halsema G.,Hellegers P.J.G.J.,et al. Assessing impacts of dike construction on the flood dynamics of the Mekong Delta[J],2018,22(3).
APA	Duc Tran D..,Van Halsema G..,Hellegers P.J.G.J..,Phi Hoang L..,Quang Tran T..,...&Ludwig F..(2018).Assessing impacts of dike construction on the flood dynamics of the Mekong Delta.Hydrology and Earth System Sciences,22(3).
MLA	Duc Tran D.,et al."Assessing impacts of dike construction on the flood dynamics of the Mekong Delta".Hydrology and Earth System Sciences 22.3(2018).