Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR024166 |
Morphological Computation of Dune Evolution with Equilibrium and Non-Equilibrium Sediment-Transport Models | |
Yamaguchi, Satomi1; Giri, Sanjay2; Shimizu, Yasuyuki3; Nelson, Jonathan M.4 | |
2019-11-05 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | Japan; Netherlands; USA |
英文摘要 | This paper presents an exploratory study that comprises the implementation and comparison of different approaches and parameterization of sediment transport mechanisms in a process-based morphological model for simulating river dunes. The purpose of this study was to assess the underlying physical processes associated with sediment transport and dune evolution simulated by the model using two different bedload transport models: a non-equilibrium approach considering saltation distance and an equilibrium approach with the incorporation of the effect of the local bed slope. The study comprised detailed analysis of the bed shear stress and sediment transport over a dune during time varying flows, comparing both transport models and revealing distinctive transient features of bedload transport and dune evolution. We also improved a non-equilibrium transport model by incorporating a formulation for sediment saltation distance as a length-scale. Using both sediment transport approaches, the morphological model was applied to replicate a large-scale field experiment. Notably, the model yielded the quasi-equilibrium dune feature reasonably well using either sediment-transport formulation. However, detailed analysis of simulated spatial and temporal features of sediment transport and the dune evolution process were found to be noticeably different. Even though both sediment transport mechanisms appear to work adequately at a basic level, the major difference between the two approaches is the underlying transport process over the dunes and time-scale of the dune evolution process. |
英文关键词 | Morphodynamics Numerical models River dunes Sediment transport Flow resistance Saltation length |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000494055300001 |
WOS关键词 | ARBITRARILY SLOPING BEDS ; LOW SHIELDS STRESS ; UNIFIED MODEL ; SAND WAVES ; FLOW ; LOAD ; MORPHODYNAMICS ; SALTATION ; MECHANICS ; FORMS |
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/188255 |
专题 | 资源环境科学 |
作者单位 | 1.Civil Engn Res Inst Cold Reg, River Engn Res Team, Sapporo, Hokkaido, Japan; 2.Deltares, Dept River Dynam Morphol & Inland Shipping, Delft, Netherlands; 3.Hokkaido Univ, Hydraul Res Lab, Sapporo, Hokkaido, Japan; 4.US Geol Survey, Geomorphol & Sediment Transport Lab, Golden, CO USA |
推荐引用方式 GB/T 7714 | Yamaguchi, Satomi,Giri, Sanjay,Shimizu, Yasuyuki,et al. Morphological Computation of Dune Evolution with Equilibrium and Non-Equilibrium Sediment-Transport Models[J]. WATER RESOURCES RESEARCH,2019. |
APA | Yamaguchi, Satomi,Giri, Sanjay,Shimizu, Yasuyuki,&Nelson, Jonathan M..(2019).Morphological Computation of Dune Evolution with Equilibrium and Non-Equilibrium Sediment-Transport Models.WATER RESOURCES RESEARCH. |
MLA | Yamaguchi, Satomi,et al."Morphological Computation of Dune Evolution with Equilibrium and Non-Equilibrium Sediment-Transport Models".WATER RESOURCES RESEARCH (2019). |
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