Surf Zone Turbulence and Suspended Sediment Dynamics—A Review

The existence of sandy beaches relies on the onshore transport of sand by waves during post-storm conditions. Most operational sediment transport models employ wave-averaged terms, and/or the instantaneous cross-shore velocity signal, but the models often fail in predictions of the onshore-directed...

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Autores principales:	Troels Aagaard, Joost Brinkkemper, Drude F. Christensen, Michael G. Hughes, Gerben Ruessink
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	turbulence suspended sediment sediment transport breaking waves beach recovery Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/cb7d0c91d744491aa66033cd9c45c42e
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spelling	oai:doaj.org-article:cb7d0c91d744491aa66033cd9c45c42e2021-11-25T18:05:13ZSurf Zone Turbulence and Suspended Sediment Dynamics—A Review10.3390/jmse91113002077-1312https://doaj.org/article/cb7d0c91d744491aa66033cd9c45c42e2021-11-01T00:00:00Zhttps://www.mdpi.com/2077-1312/9/11/1300https://doaj.org/toc/2077-1312The existence of sandy beaches relies on the onshore transport of sand by waves during post-storm conditions. Most operational sediment transport models employ wave-averaged terms, and/or the instantaneous cross-shore velocity signal, but the models often fail in predictions of the onshore-directed transport rates. An important reason is that they rarely consider the phase relationships between wave orbital velocity and the suspended sediment concentration. This relationship depends on the intra-wave structure of the bed shear stress and hence on the timing and magnitude of turbulence production in the water column. This paper provides an up-to-date review of recent experimental advances on intra-wave turbulence characteristics, sediment mobilization, and suspended sediment transport in laboratory and natural surf zones. Experimental results generally show that peaks in the suspended sediment concentration are shifted forward on the wave phase with increasing turbulence levels and instantaneous near-bed sediment concentration scales with instantaneous turbulent kinetic energy. The magnitude and intra-wave phase of turbulence production and sediment concentration are shown to depend on wave (breaker) type, seabed configuration, and relative wave height, which opens up the possibility of more robust predictions of transport rates for different wave and beach conditions.Troels AagaardJoost BrinkkemperDrude F. ChristensenMichael G. HughesGerben RuessinkMDPI AGarticleturbulencesuspended sedimentsediment transportbreaking wavesbeach recoveryNaval architecture. Shipbuilding. Marine engineeringVM1-989OceanographyGC1-1581ENJournal of Marine Science and Engineering, Vol 9, Iss 1300, p 1300 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	turbulence suspended sediment sediment transport breaking waves beach recovery Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
spellingShingle	turbulence suspended sediment sediment transport breaking waves beach recovery Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Troels Aagaard Joost Brinkkemper Drude F. Christensen Michael G. Hughes Gerben Ruessink Surf Zone Turbulence and Suspended Sediment Dynamics—A Review
description	The existence of sandy beaches relies on the onshore transport of sand by waves during post-storm conditions. Most operational sediment transport models employ wave-averaged terms, and/or the instantaneous cross-shore velocity signal, but the models often fail in predictions of the onshore-directed transport rates. An important reason is that they rarely consider the phase relationships between wave orbital velocity and the suspended sediment concentration. This relationship depends on the intra-wave structure of the bed shear stress and hence on the timing and magnitude of turbulence production in the water column. This paper provides an up-to-date review of recent experimental advances on intra-wave turbulence characteristics, sediment mobilization, and suspended sediment transport in laboratory and natural surf zones. Experimental results generally show that peaks in the suspended sediment concentration are shifted forward on the wave phase with increasing turbulence levels and instantaneous near-bed sediment concentration scales with instantaneous turbulent kinetic energy. The magnitude and intra-wave phase of turbulence production and sediment concentration are shown to depend on wave (breaker) type, seabed configuration, and relative wave height, which opens up the possibility of more robust predictions of transport rates for different wave and beach conditions.
format	article
author	Troels Aagaard Joost Brinkkemper Drude F. Christensen Michael G. Hughes Gerben Ruessink
author_facet	Troels Aagaard Joost Brinkkemper Drude F. Christensen Michael G. Hughes Gerben Ruessink
author_sort	Troels Aagaard
title	Surf Zone Turbulence and Suspended Sediment Dynamics—A Review
title_short	Surf Zone Turbulence and Suspended Sediment Dynamics—A Review
title_full	Surf Zone Turbulence and Suspended Sediment Dynamics—A Review
title_fullStr	Surf Zone Turbulence and Suspended Sediment Dynamics—A Review
title_full_unstemmed	Surf Zone Turbulence and Suspended Sediment Dynamics—A Review
title_sort	surf zone turbulence and suspended sediment dynamics—a review
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/cb7d0c91d744491aa66033cd9c45c42e
work_keys_str_mv	AT troelsaagaard surfzoneturbulenceandsuspendedsedimentdynamicsareview AT joostbrinkkemper surfzoneturbulenceandsuspendedsedimentdynamicsareview AT drudefchristensen surfzoneturbulenceandsuspendedsedimentdynamicsareview AT michaelghughes surfzoneturbulenceandsuspendedsedimentdynamicsareview AT gerbenruessink surfzoneturbulenceandsuspendedsedimentdynamicsareview
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Surf Zone Turbulence and Suspended Sediment Dynamics—A Review

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