Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR020024 |
Validating a universal model of particle transport lengths with laboratory measurements of suspended grain motions | |
Naqshband, Suleyman1,2; McElroy, Brandon1; Mahon, Robert C.1 | |
2017-05-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Netherlands |
英文摘要 | The mechanics of sediment transport are of fundamental importance for fluvio-deltaic morphodynamics. The present study focuses on quantifying particle motions and trajectories across a wide range of flow conditions. In particular, a continuous model is presented that predicts particle travel distances for saltation and suspension based on Rouse number and relative grain roughness. By utilizing a series of eight video cameras in a plexiglass flume direct measurements of the distributions of particle travel distances (excursion lengths) were obtained. To this end, experiments were carried out in dark under black lights with fluorescent painted plastic and quartz sand particles. For relatively high Rouse numbers indicating bed load dominant transport regime ( P2.5), particle motion is governed by the effect of gravitational forces (settling velocities) and measured excursion lengths closely follow a Gaussian distribution. For P=2.5, particle motion is equally subjected to both gravitational and turbulent forces. Consequently, measured excursion lengths exhibit a bimodal distribution with two distinct peaks. As turbulent fluctuations increase and dominate particle motion over gravity ( P<2.5), distributions of excursion lengths become unimodal and negative-skewed with mean values deviating from the modes. The predicted trend of linearly increasing excursion lengths with decreasing Rouse numbers is consistent with measured excursion lengths across a wide range of Rouse numbers (P=1.8-8.9). Furthermore, measured excursion lengths are observed to fit within the predicted range of excursion lengths with no significant difference between measured excursion lengths of plastic and quartz sand particles. |
英文关键词 | particle motion particle saltation and excursion lengths sediment transport |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403712100035 |
WOS关键词 | BED-LOAD TRANSPORT ; CONTINUOUS SALTATING PROCESS ; SEDIMENT-TRANSPORT ; WATER-STREAM ; TURBIDITY CURRENTS ; GRAVEL SALTATION ; SAND ; DYNAMICS ; RIVERS ; TRAJECTORIES |
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/21220 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Wyoming, Dept Geol & Geophys, Laramie, WY 82071 USA; 2.Wageningen Univ & Res Ctr, Hydrol & Quantitat Water Management Grp, Wageningen, Netherlands |
推荐引用方式 GB/T 7714 | Naqshband, Suleyman,McElroy, Brandon,Mahon, Robert C.. Validating a universal model of particle transport lengths with laboratory measurements of suspended grain motions[J]. WATER RESOURCES RESEARCH,2017,53(5). |
APA | Naqshband, Suleyman,McElroy, Brandon,&Mahon, Robert C..(2017).Validating a universal model of particle transport lengths with laboratory measurements of suspended grain motions.WATER RESOURCES RESEARCH,53(5). |
MLA | Naqshband, Suleyman,et al."Validating a universal model of particle transport lengths with laboratory measurements of suspended grain motions".WATER RESOURCES RESEARCH 53.5(2017). |
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