Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL075906 |
A Sharp View on River Dune Transition to Upper Stage Plane Bed | |
Naqshband, S.1; Hoitink, A. J. F.1; McElroy, B.2; Hurther, D.3; Hulscher, S. J. M. H.4 | |
2017-11-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:22 |
文章类型 | Article |
语种 | 英语 |
国家 | Netherlands; USA; France |
英文摘要 | Sandy river beds are dominated by rhythmic features known as dunes. Experimental investigations of turbulent flow and sediment transport over dunes have predominantly focused on equilibrium flows that are rare in natural rivers. Using a novel acoustic instrument over migrating dunes in a laboratory setting, we quantify a number of dynamical properties that are crucial in our understanding and modeling of dune morphology and kinematics, particularly under nonequilibrium flows during dune transition to upper stage plane bed. Measured sediment transport distributions reveal a positive spatial lag between dune crest and maximum sediment transport rate that eventually caused washing out of dunes. Bed load was entirely captured in dune troughs, contributing to dune translation where most of suspended load was advected further downstream contributing to dune deformation. Measured bypass fraction was about 76%, which means that only 24% of the total sediment load at the dune crest contributed to dune migration. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419102300025 |
WOS关键词 | MIGRATING SAND DUNES ; FLOW STRUCTURE ; MARS ; MORPHOLOGY ; STABILITY ; TRANSPORT ; DYNAMICS ; STRESS ; FLUXES ; MODEL |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/28658 |
专题 | 气候变化 |
作者单位 | 1.Wageningen Univ, Dept Environm Sci, Wageningen, Netherlands; 2.Univ Wyoming, Dept Geol & Geophys, Laramie, WY 82071 USA; 3.Univ Grenoble Alpes, CNRS, Lab Geophys & Ind Flows LEGI, Grenoble, France; 4.Univ Twente, Dept Civil Engn, Enschede, Netherlands |
推荐引用方式 GB/T 7714 | Naqshband, S.,Hoitink, A. J. F.,McElroy, B.,et al. A Sharp View on River Dune Transition to Upper Stage Plane Bed[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(22). |
APA | Naqshband, S.,Hoitink, A. J. F.,McElroy, B.,Hurther, D.,&Hulscher, S. J. M. H..(2017).A Sharp View on River Dune Transition to Upper Stage Plane Bed.GEOPHYSICAL RESEARCH LETTERS,44(22). |
MLA | Naqshband, S.,et al."A Sharp View on River Dune Transition to Upper Stage Plane Bed".GEOPHYSICAL RESEARCH LETTERS 44.22(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论