Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023273 |
Transverse Momentum Exchange Induced by Large Coherent Structures in a Vegetated Compound Channel | |
Truong, S. H.1,2; Uijttewaal, W. S. J.1 | |
2019 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:1页码:589-612 |
文章类型 | Article |
语种 | 英语 |
国家 | Netherlands; Vietnam |
英文摘要 | In floodplains of vegetated channels, transverse exchange processes of mass and momentum are of primary importance as these are directly linked to the river bank stability, sedimentation, and nutrient transport. Despite its importance, knowledge about this phenomenon is still incomplete especially in the context of the presence of the large horizontal coherent structures (LHCSs). As a result, although various exchange models have been developed, their applicability in different circumstances is still unclear as their validity is usually restricted to a narrowly ranging experiment data set. A proper model for this exchange in a compound channel geometry with or without vegetation is lacking. In order to obtain more insight, a laboratory experiment of a shallow flow field in a compound vegetated channel has been conducted. A quadrant analysis of the Reynolds shear stresses has been applied to study the connection between the cycloid flow events induced by the LHCSs and transverse momentum exchange in the channel. It is suggested that local variability leads to differences in the transverse exchange of momentum. Furthermore, the experimental data were used to verify state-of-the-art momentum exchange models. As the limitations of those models were analyzed, for the first time a hybrid eddy viscosity model based on the occurrence of LHCSs and the presence of vegetation was proposed and validated using a variety of experimental data sets. The results suggest that the transverse momentum exchange can be well modeled with the new eddy viscosity model for quite a range of different setups and scenarios by varying only a coefficient of proportionality , which is related to the transverse slope between the main channel and the floodplain. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459536500033 |
WOS关键词 | MANGROVE SQUEEZE ; FLOW RESISTANCE ; TURBULENCE ; STRAIGHT |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/19932 |
专题 | 资源环境科学 |
作者单位 | 1.Delft Univ Technol, Fac Civil Engn & Geosci, Hydraul Dept, Delft, Netherlands; 2.Thuy Loi Univ, Hydraul Dept, Fac Civil Engn, Hanoi, Vietnam |
推荐引用方式 GB/T 7714 | Truong, S. H.,Uijttewaal, W. S. J.. Transverse Momentum Exchange Induced by Large Coherent Structures in a Vegetated Compound Channel[J]. WATER RESOURCES RESEARCH,2019,55(1):589-612. |
APA | Truong, S. H.,&Uijttewaal, W. S. J..(2019).Transverse Momentum Exchange Induced by Large Coherent Structures in a Vegetated Compound Channel.WATER RESOURCES RESEARCH,55(1),589-612. |
MLA | Truong, S. H.,et al."Transverse Momentum Exchange Induced by Large Coherent Structures in a Vegetated Compound Channel".WATER RESOURCES RESEARCH 55.1(2019):589-612. |
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