1 Department of Mechanical Engineering, Technical University of Denmark 2 Coastal, Maritime and Structural Engineering, Department of Mechanical Engineering, Technical University of Denmark 3 Fluid Mechanics, Coastal and Maritime Engineering, Department of Mechanical Engineering, Technical University of Denmark
This paper presents a numerical study of the non-linear development of alongshore undulations up to fully developed quasi-steady equilibrium. A numerical model which describes the longshore sediment transport along arbitrarily shaped shorelines is applied, based on a spectral wave model, a depth integrated flow model, a wave-phase resolving sediment transport description and a one-line shoreline model.First the length of the shoreline undulations is determined in the linear regime using a stability analysis. Next the further evolution from the linear to the fully non-linear regime is described. In the fully non-linear regime down-drift spits and migrating shoreline undulations are described.Three different shoreline shapes are found depending on the wave conditions: undulations with no spits, undulations with shore parallel spit and undulations with reconnecting spits. © 2012 Published by Elsevier B.V.
Coastal Engineering, 2013, Vol 75, p. 64-76
Shoreline undulations; Shoreline spit; Numerical shoreline model; Longshore sediment transport; Area model
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