Self-organized pattern formation in coastal barrier washover deposits
Self-organized pattern formation in coastal barrier washover deposits
Storm-driven overwash is a sediment-transport process fundamental to the evolution of low-lying coastal environments. Physical insight into overwash morphodynamics is crucial for improved risk assessment and hazard forecasting in vulnerable coastal zones. Spatially extended observations of washover deposits have shown that back-barrier shoreline planforms can be quasi-periodic. These rhythmic patterns have been attributed to the influence of a forcing template in bathymetry or topography, or as inherent in the forcing itself. With an alternative to this prevailing explanation, we present results of a physical experiment and numerical model in which quasi-periodic patterns in washover deposits are self-organized, arising from interactions between barrier topography, routing of overwash flow, and sediment flux.
363-366
Lazarus, E.D.
642a3cdb-0d25-48b1-8ab8-8d1d72daca6e
Armstrong, S.
8ea70b95-7fcf-4e67-af33-aef07d78e0f0
April 2015
Lazarus, E.D.
642a3cdb-0d25-48b1-8ab8-8d1d72daca6e
Armstrong, S.
8ea70b95-7fcf-4e67-af33-aef07d78e0f0
Lazarus, E.D. and Armstrong, S.
(2015)
Self-organized pattern formation in coastal barrier washover deposits.
Geology, 43 (4), .
(doi:10.1130/G36329.1).
Abstract
Storm-driven overwash is a sediment-transport process fundamental to the evolution of low-lying coastal environments. Physical insight into overwash morphodynamics is crucial for improved risk assessment and hazard forecasting in vulnerable coastal zones. Spatially extended observations of washover deposits have shown that back-barrier shoreline planforms can be quasi-periodic. These rhythmic patterns have been attributed to the influence of a forcing template in bathymetry or topography, or as inherent in the forcing itself. With an alternative to this prevailing explanation, we present results of a physical experiment and numerical model in which quasi-periodic patterns in washover deposits are self-organized, arising from interactions between barrier topography, routing of overwash flow, and sediment flux.
Text
G36329-Lazarus-accepted-ms-wDR.pdf
- Accepted Manuscript
More information
Accepted/In Press date: 4 February 2015
e-pub ahead of print date: 27 February 2015
Published date: April 2015
Organisations:
Earth Surface Dynamics
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Local EPrints ID: 400714
URI: http://eprints.soton.ac.uk/id/eprint/400714
ISSN: 0091-7613
PURE UUID: 66a7beb1-bf42-45af-b9d0-2d8b2664a973
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Date deposited: 23 Sep 2016 14:04
Last modified: 15 Mar 2024 03:57
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Author:
S. Armstrong
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