Sediment transport under a swash event: the effect of boundary conditions

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Using a Lagrangian framework, we obtain predictions for suspended sediment transport under a swash event described by a recently proposed shallow-water model in which the swash is driven by a sustained off-shore bore and the sediment supply from the bore may vary with time. Although the hydrodynamics of the 'modified' swash flows differ somewhat from the classic Shen-Meyer description, the overall patterns of sediment transport are shown to be rather robust to this difference. In particular, it appears that in order to determine whether the swash zone imports or exports sediment, it is still crucial to determine accurately how much sediment is suspended by the incoming bore and advected into the swash zone by the flow following bore collapse. Both the total amount of this 'pre-suspended' sediment and its phasing relative to the swash inflow are important if net deposition patterns are to be predicted accurately
LanguageEnglish
Pages970-981
Number of pages12
JournalCoastal Engineering
Volume56
Issue number9
DOIs
Publication statusPublished - 2009

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Suspended sediments
Sediment transport
Boundary conditions
Sediments
Hydrodynamics
Water

Keywords

  • swash zone
  • suspended sediment
  • mathematical model

Cite this

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title = "Sediment transport under a swash event: the effect of boundary conditions",
abstract = "Using a Lagrangian framework, we obtain predictions for suspended sediment transport under a swash event described by a recently proposed shallow-water model in which the swash is driven by a sustained off-shore bore and the sediment supply from the bore may vary with time. Although the hydrodynamics of the 'modified' swash flows differ somewhat from the classic Shen-Meyer description, the overall patterns of sediment transport are shown to be rather robust to this difference. In particular, it appears that in order to determine whether the swash zone imports or exports sediment, it is still crucial to determine accurately how much sediment is suspended by the incoming bore and advected into the swash zone by the flow following bore collapse. Both the total amount of this 'pre-suspended' sediment and its phasing relative to the swash inflow are important if net deposition patterns are to be predicted accurately",
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Sediment transport under a swash event : the effect of boundary conditions. / Pritchard, D.

In: Coastal Engineering, Vol. 56, No. 9, 2009, p. 970-981.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Sediment transport under a swash event

T2 - Coastal Engineering

AU - Pritchard, D.

PY - 2009

Y1 - 2009

N2 - Using a Lagrangian framework, we obtain predictions for suspended sediment transport under a swash event described by a recently proposed shallow-water model in which the swash is driven by a sustained off-shore bore and the sediment supply from the bore may vary with time. Although the hydrodynamics of the 'modified' swash flows differ somewhat from the classic Shen-Meyer description, the overall patterns of sediment transport are shown to be rather robust to this difference. In particular, it appears that in order to determine whether the swash zone imports or exports sediment, it is still crucial to determine accurately how much sediment is suspended by the incoming bore and advected into the swash zone by the flow following bore collapse. Both the total amount of this 'pre-suspended' sediment and its phasing relative to the swash inflow are important if net deposition patterns are to be predicted accurately

AB - Using a Lagrangian framework, we obtain predictions for suspended sediment transport under a swash event described by a recently proposed shallow-water model in which the swash is driven by a sustained off-shore bore and the sediment supply from the bore may vary with time. Although the hydrodynamics of the 'modified' swash flows differ somewhat from the classic Shen-Meyer description, the overall patterns of sediment transport are shown to be rather robust to this difference. In particular, it appears that in order to determine whether the swash zone imports or exports sediment, it is still crucial to determine accurately how much sediment is suspended by the incoming bore and advected into the swash zone by the flow following bore collapse. Both the total amount of this 'pre-suspended' sediment and its phasing relative to the swash inflow are important if net deposition patterns are to be predicted accurately

KW - swash zone

KW - suspended sediment

KW - mathematical model

U2 - 10.1016/j.coastaleng.2009.06.004

DO - 10.1016/j.coastaleng.2009.06.004

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JO - Coastal Engineering

JF - Coastal Engineering

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