Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026050 |
Flow and Sediment Flux Asymmetry in a Branching Channel Delta | |
Wagner, W.1,2; Mohrig, D.1 | |
2019-11-20 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | USA |
英文摘要 | River deltas form complex branching patterns that distribute sediment to the coastal sea. The routing and storage of this sediment in deltas are poorly understood. We present results of a 1-month study of the sediment and water transport through two branches of the Wax Lake Delta on the coast of Louisiana. The two channels maintained near-equal total partitioning of flow and sediment discharge. East Pass was narrower and had higher tidally averaged velocities, lower tidal velocity fluctuations, more sediment flux, and less alluvial bed cover than Main Pass. We connected these differences to small differences in the geometry of the channels and feedbacks between these differences. East Pass was slightly shorter than Main Pass, leading to a steeper mean free surface profile, yielding higher subtidal currents and advective sediment fluxes. Main Pass received the tides from Atchafalaya Bay earlier than East Pass, allowing tides to reach their junction earlier from Main Pass. This led to Main Pass capturing tidal prism from East Pass and higher tidal velocity fluctuations in Main Pass. These fluctuations caused larger flow convergences in Main Pass, pumping sediment out of East Pass on tidal timescales. Since East Pass had higher mean velocities and lower tidal fluctuations, it spent less time in flow regimes that would allow the formation of alluvial bed cover. By explaining these asymmetries with physical arguments, we showed how geometric differences drive asymmetries in branching systems. Barrier island inlets, coastal lagoons, and other systems may display similar behavior. |
英文关键词 | Sediment transport River delta Tidal dynamics Tidal pumping Morphodynamics Louisiana |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000497304500001 |
WOS关键词 | REDUCED-COMPLEXITY MODEL ; DISTRIBUTARY CHANNELS ; BED-LOAD ; TRANSPORT ; DISCHARGE ; DIVISION ; IMPACT |
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/223918 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Texas Austin, Dept Geol Sci, Austin, TX 78712 USA; 2.Univ New Orleans, Dept Civil & Environm Engn, New Orleans, LA 70148 USA |
推荐引用方式 GB/T 7714 | Wagner, W.,Mohrig, D.. Flow and Sediment Flux Asymmetry in a Branching Channel Delta[J]. WATER RESOURCES RESEARCH,2019. |
APA | Wagner, W.,&Mohrig, D..(2019).Flow and Sediment Flux Asymmetry in a Branching Channel Delta.WATER RESOURCES RESEARCH. |
MLA | Wagner, W.,et al."Flow and Sediment Flux Asymmetry in a Branching Channel Delta".WATER RESOURCES RESEARCH (2019). |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
查看访问统计 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[Wagner, W.]的文章 |
[Mohrig, D.]的文章 |
百度学术 |
百度学术中相似的文章 |
[Wagner, W.]的文章 |
[Mohrig, D.]的文章 |
必应学术 |
必应学术中相似的文章 |
[Wagner, W.]的文章 |
[Mohrig, D.]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
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