气候变化领域集成服务门户(CCPortal): Bedform segregation and locking increase storage of natural and synthetic particles in rivers

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DOI	10.1038/s41467-021-27554-4
	Bedform segregation and locking increase storage of natural and synthetic particles in rivers
	Dallmann J.; Phillips C.B.; Teitelbaum Y.; Saavedra Cifuentes E.Y.; Sund N.; Schumer R.; Arnon S.; Packman A.I.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	While the ecological significance of hyporheic exchange and fine particle transport in rivers is well established, these processes are generally considered irrelevant to riverbed morphodynamics. We show that coupling between hyporheic exchange, suspended sediment deposition, and sand bedform motion strongly modulates morphodynamics and sorts bed sediments. Hyporheic exchange focuses fine-particle deposition within and below mobile bedforms, which suppresses bed mobility. However, deposited fines are also remobilized by bedform motion, providing a mechanism for segregating coarse and fine particles in the bed. Surprisingly, two distinct end states emerge from the competing interplay of bed stabilization and remobilization: a locked state in which fine particle deposition completely stabilizes the bed, and a dynamic equilibrium in which frequent remobilization sorts the bed and restores mobility. These findings demonstrate the significance of hyporheic exchange to riverbed morphodynamics and clarify how dynamic interactions between coarse and fine particles produce sedimentary patterns commonly found in rivers. © 2021, The Author(s).
语种	英语
scopus关键词	bedform; deposition; fluvial deposit; morphodynamics; pollutant transport; remobilization; river pollution
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251282
作者单位	Department Mechanical Engineering, Northwestern University, Evanston, IL, United States; Center for Preparatory Studies, Nazarbayev University, Nur-Sultan, Kazakhstan; Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, United States; Department of Civil and Environmental Engineering, Utah State University, Logan, UT, United States; Zuckerberg Institute for Water Research, Ben‐Gurion University of the Negev, Beersheba, Israel; Desert Research Institute, Reno, NV, United States
推荐引用方式 GB/T 7714	Dallmann J.,Phillips C.B.,Teitelbaum Y.,et al. Bedform segregation and locking increase storage of natural and synthetic particles in rivers[J],2021,12(1).
APA	Dallmann J..,Phillips C.B..,Teitelbaum Y..,Saavedra Cifuentes E.Y..,Sund N..,...&Packman A.I..(2021).Bedform segregation and locking increase storage of natural and synthetic particles in rivers.Nature Communications,12(1).
MLA	Dallmann J.,et al."Bedform segregation and locking increase storage of natural and synthetic particles in rivers".Nature Communications 12.1(2021).