Estimation of Bankfull Discharge in the Lower Yellow River

doi:10.1134/S009780781902009X

	Estimation of Bankfull Discharge in the Lower Yellow River
	He, Li
刊名	WATER RESOURCES
	2019-03-01
卷号	46 期号:2 页码:160-171
关键词	bankfull elevation bankfull discharge additional indicators Lower Yellow River
ISSN号	0097-8078
DOI	10.1134/S009780781902009X
通讯作者	He, Li(heli@igsnrr.ac.cn)
英文摘要	Bankfull discharge is highly correlated with bankfull elevation. The main channels and bankfull elevations in multi-thread sections are ambiguous and need additional indicators to define. Thus, two additional indicators (maximum width and effective width coefficient) were adopted to estimate the bankfull elevation of both multi- and single-thread cross-sections. Three geometric-criterion based definitions of bankfull elevation (minimum width-depth ratio, abruptly changing-point of wetted area to top channel width ratio, first maximum Riley bench index) were selected to estimate bankfull elevation. Typical cross-sections selected were the Huayuankou and Lijin cross-sections in the Lower Yellow River. More than 300 cross-sectional datasets of the Huayuankou and Lijin were collected to calibrate the value of effective width coefficient. Second, calibrated coefficients were verified by various applications, estimating the variation of sectional bankfull discharge in floods, estimating the variation of sectional bankfull discharge along a river reach, and estimating annual variation of reach-scale bankfull discharge. Third, sensitivities of physical parameters were further analyzed. Calculation and analysis showed that the effective width coefficient was necessary for estimating bankfull elevation in multi-thread cross-sections, and these three definitions could be adapted to estimate the bankfull elevation when coupled with these two indicators. Besides, the key point of this method was defining the maximum width and effective width coefficients, as other factors have limited effects on estimating bankfull discharge. Analyses can also provide information for field survey refering to the balance between time consuming and detailed measurements.
资助项目	National Natural Science Foundation of China[51109198] ; National Natural Science Foundation of China[51579230]
WOS关键词	FREQUENCY ; MAGNITUDE ; STREAMS ; MODEL ; FLOW ; LOAD
WOS研究方向	Water Resources
语种	英语
出版者	MAIK NAUKA/INTERPERIODICA/SPRINGER
WOS记录号	WOS:000468625300003
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/311030/59479]
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 & Related Land Surface Proc, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	He, Li. Estimation of Bankfull Discharge in the Lower Yellow River[J]. WATER RESOURCES,2019,46(2):160-171.
APA	He, Li.(2019).Estimation of Bankfull Discharge in the Lower Yellow River.WATER RESOURCES,46(2),160-171.
MLA	He, Li."Estimation of Bankfull Discharge in the Lower Yellow River".WATER RESOURCES 46.2(2019):160-171.