Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR025131 |
Mean Velocity and Shear Stress Distribution in Floating Treatment Wetlands: An Analytical Study | |
Li, Shuolin1,2; Katul, Gabriel2,3; Huai, Wenxin4 | |
2019-08-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:8页码:6436-6449 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | Floating treatment wetlands (FTWs) are efficient at wastewater treatment; however, data and physical models describing water flow through them remain limited. A two-domain model is proposed dividing the flow region into an upper part characterizing the flow through suspended vegetation and an inner part describing the vegetation-free zone. The suspended vegetation domain is represented as a porous medium characterized by constant permeability thereby allowing Biot's Law to be used to describe the mean velocity and stress profiles. The flow in the inner part is bounded by asymmetric stresses arising from interactions with the suspended vegetated (porous) base and solid channel bed. An asymmetric eddy viscosity model is employed to derive an integral expression for the shear stress and the mean velocity profiles in this inner layer. The solution features an asymmetric shear stress index that reflects two different roughness conditions over the vegetation-induced auxiliary bed and the physical channel bed. A phenomenological model is then presented to explain this index. An expression for the penetration depth into the porous medium defined by 10% of the maximum shear stress is also derived. The predicted shear stress profile, local mean velocity profile, and bulk velocity agree with the limited experiments published in the literature. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000490973700005 |
WOS关键词 | OPEN-CHANNEL FLOWS ; TURBULENCE ; RESISTANCE ; DISPERSION ; TRANSPORT ; CANOPIES ; SMOOTH ; MODEL ; WAVES |
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/185845 |
专题 | 资源环境科学 |
作者单位 | 1.Cornell Univ, Sibley Sch Mech & Aerosp Engn, Ithaca, NY 14853 USA; 2.Duke Univ, Nicholas Sch Environm, Durham, NC 27708 USA; 3.Duke Univ, Dept Civil & Environm Engn, Durham, NC 27706 USA; 4.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Hubei, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Shuolin,Katul, Gabriel,Huai, Wenxin. Mean Velocity and Shear Stress Distribution in Floating Treatment Wetlands: An Analytical Study[J]. WATER RESOURCES RESEARCH,2019,55(8):6436-6449. |
APA | Li, Shuolin,Katul, Gabriel,&Huai, Wenxin.(2019).Mean Velocity and Shear Stress Distribution in Floating Treatment Wetlands: An Analytical Study.WATER RESOURCES RESEARCH,55(8),6436-6449. |
MLA | Li, Shuolin,et al."Mean Velocity and Shear Stress Distribution in Floating Treatment Wetlands: An Analytical Study".WATER RESOURCES RESEARCH 55.8(2019):6436-6449. |
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