Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR025098 |
Role of Bioroughness, Bioirrigation, and Turbulence on Oxygen Dynamics at the Sediment-Water Interface | |
Liu, Y.1; Reible, D.1; Hussain, F.2; Fang, H.3 | |
2019-10-15 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | Models that have been developed to quantify the oxygen flux at the sediment-water interface (SWI) generally do not explicitly consider the influence of bioroughness (mounds and burrows) and bioirrigation. We performed a numerical study of the influence of overlying water velocity, bioroughness, and bioirrigation on the oxygen flux across the SWI. We found that compared with a flat bed, bioroughness significantly increases O-2 transport at the SWI as a result of enhanced turbulence and pressure differences across the roughness. Bioirrigation can also enhance O-2 transport across the SWI by a factor of up to 10 when the roughness Reynolds number (Re-*) is low, but the influence of bioirrigation decreases with increasing Re-*. Burrows increase O-2 penetration depth, and bioirrigation causes asymmetric distributions of O-2 along burrows. Despite the complexity of O-2 distribution in sediments, the net exchange across the SWI can be described by the relationship of O'Connor and Harvey (2008, https://doi.org/10.1029/2008WR007160) (D-e/D-m/Re*Pe1:2 = a = 0:0005) when the shape is two-dimensional or when the burrow density is low. When the burrow density is large, flow is three-dimensional and flow interactions between burrows become important. Under these conditions the net exchange across the SWI increases by up to a factor of 4. A burrow number is introduced, Bu = [burrow density](1/2) [burrow height], to correct the coefficient in O'Connor and Harvey's relationship, that is, a = 0.005 for Bu < 0.05 and a = 0.02 for Bu >> 0.1. |
英文关键词 | bioturbation hyporheic exchange LES burrow |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000490111000001 |
WOS关键词 | LARGE-EDDY SIMULATION ; PERMEABLE SEDIMENTS ; SOLUTE EXCHANGE ; METALS RELEASE ; FLUXES ; FLOW ; BIOTURBATION ; SHRIMP ; IMPACT ; TRANSPORT |
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/187675 |
专题 | 资源环境科学 |
作者单位 | 1.Texas Tech Univ, Dept Civil & Environm Engn, Lubbock, TX 79409 USA; 2.Texas Tech Univ, Dept Mech Engn, Lubbock, TX 79409 USA; 3.Tsinghua Univ, Dept Hydraul Engn, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Y.,Reible, D.,Hussain, F.,et al. Role of Bioroughness, Bioirrigation, and Turbulence on Oxygen Dynamics at the Sediment-Water Interface[J]. WATER RESOURCES RESEARCH,2019. |
APA | Liu, Y.,Reible, D.,Hussain, F.,&Fang, H..(2019).Role of Bioroughness, Bioirrigation, and Turbulence on Oxygen Dynamics at the Sediment-Water Interface.WATER RESOURCES RESEARCH. |
MLA | Liu, Y.,et al."Role of Bioroughness, Bioirrigation, and Turbulence on Oxygen Dynamics at the Sediment-Water Interface".WATER RESOURCES RESEARCH (2019). |
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