Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR022418 |
A Model for Mass Transport Across the Sediment-Water Interface | |
Voermans, Joey J.1; Ghisalberti, Marco1,2; Ivey, Gregory N.1,3 | |
2018-04-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:4页码:2799-2812 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | Molecular diffusion, dispersion, and turbulent diffusion can all contribute to the transport of mass across the sediment-water interface (SWI). Flow observations across the SWI are critical in the description of these transport processes but are currently very limited as the sediment bed is inaccessible in most experimental approaches. We overcome this constraint by combining refractive-index matching (RIM) with particle-tracking velocimetry (PTV). Using measurements of the flow dynamics across the SWI, we propose a mechanistic model that describes the interfacial mass transport over a wide and relevant parameter space. We show there are three transport regimes where molecular, dispersive, or turbulent transport dominates the mass flux of a passive tracer across the SWI. Transitions between these regimes are defined by the permeability Reynolds number Re-K = root KU*/nu where K is the sediment permeability, u(*) is the shear velocity, and nu is the fluid viscosity. In the molecular regime (Re-K <= O(0.01), mass transport is described by the molecular diffusion coefficient (D). In both the dispersive (O(0.01) < Re-K < O(1)) and turbulent regimes (Re-K >= O(1)), the mass diffusivity is directly proportional to (root Ku(*))Re-K. The model is strongly supported by an extensive data set of published interfacial mass flux observations and provides a tool for describing fluxes across the SWI in aquatic system models. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000434186400017 |
WOS关键词 | HIGH REYNOLDS-NUMBER ; BED OPEN-CHANNEL ; ROUGH-BED ; PERMEABLE SEDIMENTS ; BIOGEOCHEMICAL PROCESSES ; FUNCTIONAL-SIGNIFICANCE ; HYPORHEIC-EXCHANGE ; AQUATIC SEDIMENTS ; POROUS-MEDIA ; FLOWS |
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/21132 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Western Australia, Sch Civil Environm & Min Engn, Perth, WA, Australia; 2.Univ Melbourne, Dept Infrastruct Engn, Melbourne, Vic, Australia; 3.Univ Western Australia, UWA Oceans Inst, Perth, WA, Australia |
推荐引用方式 GB/T 7714 | Voermans, Joey J.,Ghisalberti, Marco,Ivey, Gregory N.. A Model for Mass Transport Across the Sediment-Water Interface[J]. WATER RESOURCES RESEARCH,2018,54(4):2799-2812. |
APA | Voermans, Joey J.,Ghisalberti, Marco,&Ivey, Gregory N..(2018).A Model for Mass Transport Across the Sediment-Water Interface.WATER RESOURCES RESEARCH,54(4),2799-2812. |
MLA | Voermans, Joey J.,et al."A Model for Mass Transport Across the Sediment-Water Interface".WATER RESOURCES RESEARCH 54.4(2018):2799-2812. |
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