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    Wind effects on wave overtopping at a vertical sea defence

    De Chowdhury, Swapnadip, Zhou, Jian Guo, Khait, Anatoliy, Pullen, Tim, Causon, Derek, Qian, Ling ORCID logoORCID: https://orcid.org/0000-0002-9716-2342 and Mingham, Clive (2023) Wind effects on wave overtopping at a vertical sea defence. Journal of Waterway, Port, Coastal and Ocean Engineering, 149 (4). ISSN 0733-950X

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    Abstract

    The wind effect on the efficiency of the coastal defence structure is studied in this paper. It is normally assumed that the strength of the wind impact is characterized by the impulse parameter. If it is lower than a certain value, the wind is expected to have a dominant effect on the wave overtopping rate. Contrary to the regular observation, this study reports a new regime of wave overshoot when low value of the impulse parameter does not lead to importance of wind. It is argued that the new regime appears due to the triplet instability previously studied by others. The variation of the standing wave height and the overshooting jet between the sequential cycles results in independence of the overtopping rates of the wind speed.

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