Numerical modelling of wave overtopping-induced erosion of grassed inner sea-dike slopes

This study considers the wave overtopping loads on a building behind a rubble mound breakwater using 2D numerical modelling. The building will be used as Coast Guard station in Greystones Marina, which is located on the Irish Sea. Similar studies, using physical modelling, were carried out recently by Watson et al. (2018) and Park et al. (2017). The applicability of the numerical model in predicting wave overtopping forces is discussed. Appropriate design wave conditions are considered and the resultant loads are assessed to determine their impact on the design of the proposed building.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/4tZfjVDRPT4

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Influence of Low Sea-Dike Crown-Walls on Wave Overtopping Discharge

Coastal Engineering Journal ◽

10.1142/s0578563413500137 ◽

2013 ◽

Vol 55 (4) ◽

pp. 1350013-1-1350013-23 ◽

Cited By ~ 4

Author(s):

Thieu Quang Tuan

Keyword(s):

Wave Overtopping ◽

Sea Dike

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Wave overtopping over a sea dike

Journal of Computational Physics ◽

10.1016/j.jcp.2004.01.022 ◽

2004 ◽

Vol 198 (2) ◽

pp. 686-726 ◽

Cited By ~ 54

Author(s):

Tingqiu Li ◽

Peter Troch ◽

Julien De Rouck

Keyword(s):

Wave Overtopping ◽

Sea Dike

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Reduction of Wave Overtopping and Force Impact at Harbor Quays Due to Very Oblique Waves

Journal of Marine Science and Engineering ◽

10.3390/jmse8080598 ◽

2020 ◽

Vol 8 (8) ◽

pp. 598

Author(s):

Sebastian Dan ◽

Corrado Altomare ◽

Tomohiro Suzuki ◽

Tim Spiesschaert ◽

Toon Verwaest

Keyword(s):

Experimental Tests ◽

Wave Impact ◽

Wave Overtopping ◽

Oblique Waves ◽

Quay Wall ◽

Force Impact ◽

Force Reduction ◽

Wave Induced ◽

Best Fit ◽

Sea Dike

Physical model experiments were conducted in a wave tank at Flanders Hydraulics Research, Antwerp, Belgium, to characterize the wave overtopping and impact force on vertical quay walls and sloping sea dike (1:2.5) under very oblique wave attack (angle between 45° and 80°). This study was triggered by the scarce scientific literature on the overtopping and force reduction due to very oblique waves since large reduction is expected for both when compared with the perpendicular wave attack. The study aimed to compare the results from the experimental tests with formulas derived from previous experiments and applicable to a Belgian harbor generic case. The influence of storm return walls and crest berm width on top of the dikes has been analyzed in combination with the wave obliqueness. The results indicate significant reduction of the overtopping due to very oblique waves and new reduction coefficients were proposed. When compared with formulas from previous studies the proposed coefficients indicate the best fit for the overtopping reduction. Position of the storm return wall respect to the quay edge rather than its height was found to be more important for preventing wave induced overtopping. The force reduction is up to approximately 50% for the oblique waves with respect to the perpendicular wave impact and reduction coefficients were proposed for two different configurations a sea dike and vertical quay wall, respectively.

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