Analytical models for velocity distributions in compound channels with emerged and submerged vegetated floodplains

doi:10.1007/s11769-017-0888-4

	Analytical models for velocity distributions in compound channels with emerged and submerged vegetated floodplains
	Zhang Mingwu 1,2; Jiang Chunbo 2; Huang Heqing 3; Nanson, Gerald Charles 4; Chen Zhengbing 2; Yao Wenyi 1
刊名	CHINESE GEOGRAPHICAL SCIENCE
	2017-08-01
卷号	27 期号:4 页码:577-588
关键词	compound channel velocity distribution vegetated floodplain two-stage rectangular channel analytical solution
ISSN号	1002-0063
DOI	10.1007/s11769-017-0888-4
通讯作者	Zhang Mingwu(thuzmw08@126.com)
英文摘要	The lateral distributions of depth-averaged velocity in open compound channels with emerged and submerged vegetated floodplains were analyzed based on the analytical solution of the depth-integrated Reynolds-Averaged Navier-Stokes equation with a term to account for the effects of vegetation. The three cases considered for open channels were two-stage rectangular channel with emerged vegetated floodplain, rectangular channel with submerged vegetated corner, and two-stage rectangular channel with submerged vegetated floodplain, respectively. To predict the depth-averaged velocity with submerged vegetated floodplains, we proposed a new method based on a two-layer approach where flow above and through the vegetation layer was described separately. Moreover, further experiments in the two-stage rectangular channel with submerged vegetated floodplain were carried out to verify the results. The analytical solutions of the cases indicated that the corresponding analytical depth-averaged velocity distributions agree well with the simulated and experimental prediction. The analytical solutions of the cases with theoretical foundation and without programming calculation were reasonable and applicable, which were more convenient than numerical simulations. The analytical solutions provided a way for future researches to solve the problems of submerged vegetation and discontinuous phenomenon of depth-averaged velocity at the stage point for compound channels. Understanding the hydraulics of flow in compound channels with vegetated floodplains is very important for supporting the management of fluvial processes.
资助项目	National Basic Research Program of China[2011CB403303] ; National Key Research and Development Program of China[2016YFC0402408-5] ; National Natural Science Foundation of China[51179181] ; National Natural Science Foundation of China[40788001]
WOS关键词	2-DIMENSIONAL ANALYTICAL SOLUTION ; RIGID VEGETATION ; OVERBANK FLOWS ; STRAIGHT
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000405695200007
资助机构	National Basic Research Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/62811]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhang Mingwu
作者单位	1.Yellow River Conservancy Commiss, Yellow River Inst Hydraul Res, Zhengzhou 450003, Peoples R China 2.Tsinghua Univ, Dept Hydraul, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China 3.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 4.Univ Wollongong, Sch Earth & Environm Sci, Wollongong, NSW 2522, Australia
推荐引用方式 GB/T 7714	Zhang Mingwu,Jiang Chunbo,Huang Heqing,et al. Analytical models for velocity distributions in compound channels with emerged and submerged vegetated floodplains[J]. CHINESE GEOGRAPHICAL SCIENCE,2017,27(4):577-588.
APA	Zhang Mingwu,Jiang Chunbo,Huang Heqing,Nanson, Gerald Charles,Chen Zhengbing,&Yao Wenyi.(2017).Analytical models for velocity distributions in compound channels with emerged and submerged vegetated floodplains.CHINESE GEOGRAPHICAL SCIENCE,27(4),577-588.
MLA	Zhang Mingwu,et al."Analytical models for velocity distributions in compound channels with emerged and submerged vegetated floodplains".CHINESE GEOGRAPHICAL SCIENCE 27.4(2017):577-588.