Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017WR021533 |
Modeling Sedimentation Dynamics of Sediment-Laden River Intrusions in a Rotationally-Influenced, Stratified Lake | |
Scheu, Kara R.1,2; Fong, Derek1; Monismith, Stephen G.1; Fringer, Oliver B.1 | |
2018-06-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:6页码:4084-4107 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | River inflows are often the dominant source of sediment into a lacustrine system and the extent of sediment transport can be an important indicator of the impact of introduced constituents on an ecosystem. Inflow intrusions, which intrude into the middle of the water column at a depth of neutral buoyancy, can be common in deep, stratified lakes and reservoirs. However, the dynamics and associated sediment transport of these flows have received less attention in the literature compared to surface or underflow plumes. A three-dimensional hydrodynamic and sediment transport model was used to investigate sediment transport due to inflow intrusions in Pallanza Bay, an embayment within Lake Maggiore, Italy. The model was validated using field observations of inflow intrusions over varying conditions and was then used to simulate a range of realistic scenarios to evaluate sediment transport and deposition from inflow intrusions. The extent of sedimentation across the range of simulated scenarios can be estimated using a simple analytical expression with only a priori known parameters. The expression is a function of the intrusion plume speed and thickness, which are governed by the volume flow rate and the ambient stratification. We utilize the first-mode wave speed to characterize the ambient stratification in the simplified expression, which eliminates the need to characterize near-field mixing and entrainment to predict the intrusion depth. While the simple expression gives a reasonable estimate of the sedimentation extent, it does not capture lateral variability in the plume due to effects like lateral spreading and the earth's rotation. |
英文关键词 | inflow intrusions sediment extent lakes numerical modeling |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000440309900018 |
WOS关键词 | SAN-FRANCISCO BAY ; TURBULENT ENTRAINMENT ; GRAVITY CURRENTS ; CLOSURE-MODEL ; TRANSPORT ; INFLOW ; WATER ; PROPAGATION ; MOMENTUM |
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/21415 |
专题 | 资源环境科学 |
作者单位 | 1.Stanford Univ, Depat Civil & Environm Engn, Stanford, CA 94305 USA; 2.Integral Consulting Inc, Portland, OR 97204 USA |
推荐引用方式 GB/T 7714 | Scheu, Kara R.,Fong, Derek,Monismith, Stephen G.,et al. Modeling Sedimentation Dynamics of Sediment-Laden River Intrusions in a Rotationally-Influenced, Stratified Lake[J]. WATER RESOURCES RESEARCH,2018,54(6):4084-4107. |
APA | Scheu, Kara R.,Fong, Derek,Monismith, Stephen G.,&Fringer, Oliver B..(2018).Modeling Sedimentation Dynamics of Sediment-Laden River Intrusions in a Rotationally-Influenced, Stratified Lake.WATER RESOURCES RESEARCH,54(6),4084-4107. |
MLA | Scheu, Kara R.,et al."Modeling Sedimentation Dynamics of Sediment-Laden River Intrusions in a Rotationally-Influenced, Stratified Lake".WATER RESOURCES RESEARCH 54.6(2018):4084-4107. |
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