ICCE 2022

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AVERAGE OVERTOPPING DISCHARGE PREDICTION FOR BERM BREAKWATERS. (2023). Coastal Engineering Proceedings, 37, papers.27. https://doi.org/10.9753/icce.v37.papers.27


The present paper deals with overtopping prediction for berm breakwaters in line with the EurOtop methodology. The basis for the paper is the recent advances proposed for EurOtop for conventional breakwaters with respect to the influence of the wave steepness and the crest width. New model tests have been performed to investigate the applicability of these influence factors to berm breakwaters. To cover a white spot in existing data for berm breakwaters, the model tests included wave conditions with very low wave steepness. The results show that the recently developed influence factors for conventional breakwaters also improve predictions for berm breakwaters. Based heron an additional influence factor for the dimensionless berm width is established. The berm width was in previous studies made dimensionless by the wave height, but the present study indicates that the wavelength is more appropriate.


Besley (1999). Wave overtopping of seawalls, design and assessment manual. R&D Technical Report W178.

Christensen, N.F., Røge, M.S., Thomsen, J.B., Lykke Andersen, T. Burcharth, H.F. and Nørgaard, J.Q.H (2014). Overtopping on Rubble Mound Breakwaters for Low Steepness Waves in Deep and Depth Limited Conditions. Proc. of the 34th Int. Conference on Coastal Engineering, Seoul, Korea.

De Rouck, J., Verhaeghe, H. and Geeraerts, J. (2009). Crest level assessment of coastal structures - General overview. Coastal Engineering, Vol. 56, Issue 2, Pages 99-107.

Eldrup, M.R. and Lykke Andersen, T. (2019a). Applicability of Nonlinear Wavemaker Theory. Journal of Marine Science and Engineering, Vol. 7, Special Issue "Selected Papers from Coastlab18 Conference"

Eldrup, M.R. and Lykke Andersen, T. (2018). Recalibration of Overtopping Roughness Factors of Different Armour Types. Coasts, Marine Structures and Breakwaters 2017.

Eldrup, M. R. and Lykke Andersen, T. (2019b). Estimation of Incident and Reflected Wave Trains in Highly Nonlinear Two-Dimensional Irregular Waves. Journal of Waterway, Port, Coastal, and Ocean Engineering, Vol. 145, Issue 1 (January 2019).

Eldrup, M.R., Lykke Andersen, T., Van Doorslaer, K. and Van der Meer, J.W. (2022). Improved guidance on roughness and crest width in overtopping of rubble mound structures along EurOtop. Coastal Engineering 176 (2022), 104152.

EurOtop (2018). Manual on wave overtopping of sea defences and related structures. An overtopping manual largely based on European research, but for worldwide application. Van der Meer, J.W., Allsop, N.W.H., Bruce, T., De Rouck, J., Kortenhaus, A., Pullen, T., Schüttrumpf, H., Troch, P. and Zanuttigh, B., www.overtopping-manual.com.

Lykke Andersen, Burcharth (2005). Overtopping of Berm Breakwaters Extension of Overtopping Formula. Second International Coastal Symposium in Iceland.

Lykke Andersen (2006). Hydraulic Response of Rubble Mound Breakwaters. Scale Effects – Berm Breakwaters. PhD Thesis, Series Paper No. 27, Aalborg University.

Lykke Andersen, Skals, K. and Burcharth (2008). Comparison of homogenous and multi-layered berm breakwaters with respect to overtopping and front slope stability. Proceedings of the 31st International Conference on Coastal Engineering (ICCE), Hamburg, Germany, pp. 3298-3310.

Lykke Andersen, T., Clavero, M., Frigaard, P., Losada, M., Puyol, J. I. (2016). A new active absorption system and its performance to linear and non-linear waves. Coastal Engineering, Vol.114, August 2016, Pages 47–60.

Lykke Andersen, T., Clavero, M., Eldrup, M. R., Frigaard, P., Losada, M. (2018). Active Absorption of Nonlinear Irregular Waves. Proceedings of the 36th International Conference on Coastal Engineering (ICCE), Baltimore, USA.

Steendam, G.J., Van der Meer, J.W., Verhaeghe, H., Besley, P., Franco, L. and Van Gent, M.R.A. (2004). The international database on wave overtopping. ASCE, ICCE 2004, Lisbon, pp. 4301 - 4313.

Van der Meer, J.M. and Sigurdarson, S. (2017). Design and Construction of Berm Breakwaters. Advanced Series on Ocean Engineering, Vol. 40, World Scientific.

Verhaeghe, H., Van der Meer, J.W, Steendam, G. J., Besley, P., Franco, L. and Van Gent, M.R.A. (2003). Wave overtopping database as the starting point for a neural network prediction method. ASCE, Proc. Coastal Structures 2003, Portland, Oregon, pp. 418 - 430.

Viggosson, G., Sigurdarson, S. and Halldorsson, A. 1993. Keilisnes Harbour Project, Hydraulic Model Tests, Wave Disturbance Tests of Moored Ships, Breakwater Stability Tests. Icelandic Harbour Authority.

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Copyright (c) 2023 T. Lykke Andersen, M.R. Eldrup, J.W. Van der Meer