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Wave overtopping at near-vertical seawalls: Influence of foreshore evolution during storms Briganti, R.; Musumeci, R.E.; Van der Meer, J.; Romano, A.; Stancanelli, Laura Maria; Kudella, M.; Akbar, R.; Mukhdiar, R.; Altomare, C.; Suzuki, T.; De Girolamo, P.; Besio, G.; Dodd, N.; Zhu, F.; Schimmels, S. (2022). Wave overtopping at near-vertical seawalls: Influence of foreshore evolution during storms. Ocean Eng. 261: 112024. https://dx.doi.org/10.1016/j.oceaneng.2022.112024
In: Ocean Engineering. Pergamon: Elmsford. ISSN 0029-8018; e-ISSN 1873-5258, meer
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Physical modelling Structures > Hydraulic structures > Coastal structures Wave overtopping Marien/Kust |
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Abstract |
Wave overtopping at each stage of the tested storms was significantly influenced by bed changes. This was linked to the measured evolution of the beach. Measurements showed that a barred profile developed quickly at the start of each sequence, and scour developed at the toe of the structure during high water level conditions, while accretion or partial backfilling developed during low water level conditions. Due to these processes, the position of a sea state in the tested sequence is shown to be an important factor in determining the wave overtopping volume. Remarkably, when a weaker idealised storm followed a more energetic one, nearly the same level of overtopping was recorded. This is explained by the foreshore erosion, leading to increased water depths and wave heights at the toe of the structure. This finding allows to quantify and to explain the variability of wave overtopping in storms following one another at intervals shorter than the recovery time of the foreshore. |
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