Observations and modelling of a Shoreward Propagating Accretionary Wave (SPAW) at a microtidal beach
Publication date
2020
Authors
Bouvier, Clément
Price, T.D.
Balouin, Yann
Castelle, Bruno
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Abstract
At straight sandy coasts, wave-induced processes often lead to intriguing alongshore-variable morphology on spatial scales from 10s - 1000s of meters. Observations have shown that the horns of crescentic bars may separate from the bar during storms and subsequently migrate onshore towards the beach during calmer periods as a spatially coherent structure, termed Shoreward Propagating Accretionary Wave, or SPAW. Here, we aim to (1) quantify the morphological evolution of a SPAW and (2) unravel the physical processes underlying its onshore migration and spatial coherence. To do so, we studied onshore migration of a SPAW using a process-based morphodynamic model.
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Bouvier, C, Price, T D, Balouin, Y & Castelle, B 2020, 'Observations and modelling of a Shoreward Propagating Accretionary Wave (SPAW) at a microtidal beach', International Conference on Coastal Engineering (ICCE) 2020, Sydney, Australia, 13/09/20 - 18/09/20. https://doi.org/10.9753/icce.v36v.sediment.27, conference