气候变化领域集成服务门户(CCPortal): Strong Inland Propagation of Low-Frequency Long Waves in River Estuaries

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DOI	10.1029/2020GL089112
	Strong Inland Propagation of Low-Frequency Long Waves in River Estuaries
	Guo L.; Zhu C.; Wu X.; Wan Y.; Jay D.A.; Townend I.; Wang Z.B.; He Q.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	Tidal waves traveling into estuaries are modified by channel geometry and river flow. The damping effect of river flow on incident astronomical tides is well documented, whereas its impact on low-frequency tides like MSf and Mm is poorly understood. In this contribution, we employ a numerical model to explore low-frequency tidal behavior under varying river flow. MSf and Mm are locally generated by frictional mechanisms inside an estuary, and they are larger in amplitude far upstream in tidal rivers and persist landward of the point of tidal extinction. Increasing river flow nonlinearly modulates the longitudinal variations of MSf and Mm amplitudes. This is dynamically explained by flow-enhanced asymmetry in subtidal friction over the spring-neap (MSf) and perigee-apogee (Mm) cycles, respectively. Estuaries act as frequency filters, where low-frequency waves decay at a smaller rate and propagate more inland than high-frequency waves. Strong inland penetration of low-frequency tides informs compound flood management. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Flood control; Friction; Rivers; Stream flow; Tides; Astronomical tides; Channel geometry; Flood management; Frequency filters; Frictional mechanisms; High frequency waves; Longitudinal variations; Low-frequency waves; Estuaries; damping; estuarine environment; flood frequency; flooding; nearshore dynamics; numerical model; river flow; tidal channel; wave action
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169635
作者单位	State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China; Department of Hydraulic Engineering, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands; Shanghai Estuarine and Coastal Research Center, Shanghai, China; Department of Civil and Environmental Engineering, Portland State University, Portland, OR, United States; School of Ocean and Earth Sciences, University of Southampton, Southampton, United Kingdom; Marine and Coastal Systems Department, Deltares, Delft, Netherlands
推荐引用方式 GB/T 7714	Guo L.,Zhu C.,Wu X.,et al. Strong Inland Propagation of Low-Frequency Long Waves in River Estuaries[J],2020,47(19).
APA	Guo L..,Zhu C..,Wu X..,Wan Y..,Jay D.A..,...&He Q..(2020).Strong Inland Propagation of Low-Frequency Long Waves in River Estuaries.Geophysical Research Letters,47(19).
MLA	Guo L.,et al."Strong Inland Propagation of Low-Frequency Long Waves in River Estuaries".Geophysical Research Letters 47.19(2020).