气候变化领域集成服务门户(CCPortal): Lateral Circulation and Associated Sediment Transport in a Convergent Estuary

CCPortal

DOI	10.1029/2019JC015926
	Lateral Circulation and Associated Sediment Transport in a Convergent Estuary
	Chen L.; Gong W.; Zhang H.; Zhu L.; Cheng W.
发表日期	2020
ISSN	21699275
卷号	125 期号:8
英文摘要	The Coupled Ocean–Atmosphere–Wave–Sediment Transport (COAWST) modeling system was used to explore lateral circulation and associated sediment transport in a convergent estuary with existence of channel and shoals. The lateral momentum balance was found to be largely geostrophic with a barotropic pressure gradient balanced by a baroclinic pressure gradient and Coriolis forcing during most time of a tidal cycle, except at the maximum ebb/flood. At the east side (right side looking landward), due to estuarine convergence, barotropic forcing strongly modulates lateral momentum balance and generates eastward residual sediment transport during spring tides. But during neap tides, the enhanced lateral density gradient induces strong lateral baroclinic forcing to cause westward residual sediment flux. At the west side, baroclinic forcing strongly influences the lateral momentum balance and generates westward sediment transport. Together, lateral circulation tends to distribute sediment from the channel to both the side shoals during spring tides but generates westward sediment flux during neap tides. The diagnostic analysis of the lateral gradient of suspended sediment concentration (SSC) demonstrates that lateral sediment trapping is strongly influenced by the lateral circulation and the lateral asymmetry in bed erosion during spring tides, whereas lateral advection becomes the controlling factor during neap tides. Mechanisms for the lateral circulation and sediment transport can be extended to other convergent estuaries. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	China, Pearl River Delta; COAWST model system; Estuarine convergence; Lateral circulation; Lateral sediment transport
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186724
作者单位	Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China; School of Marine Sciences, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Guangzhou, China; Department of Ocean Science, Hong Kong University of Science and Technology, Hong Kong
推荐引用方式 GB/T 7714	Chen L.,Gong W.,Zhang H.,et al. Lateral Circulation and Associated Sediment Transport in a Convergent Estuary[J],2020,125(8).
APA	Chen L.,Gong W.,Zhang H.,Zhu L.,&Cheng W..(2020).Lateral Circulation and Associated Sediment Transport in a Convergent Estuary.Journal of Geophysical Research: Oceans,125(8).
MLA	Chen L.,et al."Lateral Circulation and Associated Sediment Transport in a Convergent Estuary".Journal of Geophysical Research: Oceans 125.8(2020).