Application of numerical model in evaluating the effects of a planned reservoir on reach-scale bankfull discharge of the lower Wei River

doi:10.1007/s11629-017-4657-8

	Application of numerical model in evaluating the effects of a planned reservoir on reach-scale bankfull discharge of the lower Wei River
	He Li
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2018-05-01
卷号	15 期号:5 页码:1057-1070
关键词	Wei River Bankfull discharge Reservoir Numerical model Flow change Sediment supply
ISSN号	1672-6316
DOI	10.1007/s11629-017-4657-8
通讯作者	He Li(heli@igsnrr.ac.cn)
英文摘要	Predicting the responses of an alluvial channel to changes in flow and sediment supply is essential for engineering design. Many methods have been developed in the last few decades to describe sectional bankfull characteristics (elevation and discharge); however, studies on long-term reach-scale bankfull discharge are still limited. In this study, a hydraulic model is built to calculate the reach-scale bankfull discharge, and the effects of reservoir building on downstream bankfull discharges are discussed. The studied river reach is located at the lower Wei River (WR), where the planned Dongzhuang Reservoir would be built on its largest tributary, the Jing River. A quasi-two-dimensional numerical model coupled with a bankfull discharge estimating method is put forward to calculate the reach-scale bankfull discharge. The soundness of the model is verified. Results show that the temporal variation of reach-scale bankfull discharge of the lower reach of the WR would be highly influenced by the planned reservoir, especially during the first 20 years of operation. The effect of the planned reservoir on bankfull discharge may reach its maximum when the total trapped sediment load reaches approximately 75% of the reservoir capacity. Our results show that after the first 17 years of operation, the effect of the planned reservoir on bankfull discharge of the river reach may decrease gradually. The soundness and predictive capability of the coupled model have also been calibrated by comparing with existing reservoirs. All analyses indicate that the numerical model can be used to predict the changed reach-scale bankfull discharge of the lower WR.
资助项目	National Natural Science Foundation of China[2011CB403305] ; National Natural Science Foundation of China[51579230] ; National Natural Science Foundation of China[51109198] ; National Natural Science Foundation of China[41571005] ; National Natural Science Foundation of China[51479179]
WOS关键词	YELLOW-RIVER ; FLOW
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000431989800011
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/54876]
专题	中国科学院地理科学与资源研究所
通讯作者	He Li
作者单位	Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Land Surface Proc, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	He Li. Application of numerical model in evaluating the effects of a planned reservoir on reach-scale bankfull discharge of the lower Wei River[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(5):1057-1070.
APA	He Li.(2018).Application of numerical model in evaluating the effects of a planned reservoir on reach-scale bankfull discharge of the lower Wei River.JOURNAL OF MOUNTAIN SCIENCE,15(5),1057-1070.
MLA	He Li."Application of numerical model in evaluating the effects of a planned reservoir on reach-scale bankfull discharge of the lower Wei River".JOURNAL OF MOUNTAIN SCIENCE 15.5(2018):1057-1070.