DISTRIBUTION OF INDIVIDUAL WAVE OVERTOPPING VOLUMES ON A SLOPING STRUCTURE WITH A PERMEABLE FORESHORE
PDF

How to Cite

Salauddin, M., O’Sullivan, J., Abolfathi, S., Dong, S., & Pearson, J. (2020). DISTRIBUTION OF INDIVIDUAL WAVE OVERTOPPING VOLUMES ON A SLOPING STRUCTURE WITH A PERMEABLE FORESHORE. Coastal Engineering Proceedings, (36v), papers.54. https://doi.org/10.9753/icce.v36v.papers.54

Abstract

Maximum wave overtopping volumes on sea defences are an indicator for identifying risks to people and properties from wave hazards. The probability distribution of individual overtopping volumes can generally be described by a two-parameter Weibull distribution function (shape and scale parameters). Therefore, the reliable prediction of maximum individual wave overtopping volumes at coastal structures relies on an accurate estimation of the shape factor in the Weibull distribution. This study contributes to an improved understanding of the distribution of individual wave overtopping volumes at sloping structures by analysing the wave-by-wave overtopping volumes obtained from physical model experiments on a 1V:2H sloped impermeable structure with a permeable shingle foreshore of slope 1V:20H. Measurements of the permeable shingle foreshore were benchmarked against those from an identical experimental set-up with a smooth impermeable foreshore (1V:20H) of the same geometry. Results from both experimental set-ups were compared to commonly used empirical formulations, underpinned by the assumption that an impermeable foreshore exists in front of the sea structure. The effect on the shape factor in the Weibull distribution of incident wave steepness, relative crest freeboard, probability of overtopping waves and discharge are examined to determine the variation of individual overtopping volumes with respect to these key parameters. A key finding from the study is that no major differences in Weibull distribution shape parameter were observed for the tested impermeable and permeable sloped foreshores. Existing empirical formulae were also shown to predict reasonably well the Weibull distribution shape parameter, b, at sloping structures with both impermeable and permeable slopes.
https://doi.org/10.9753/icce.v36v.papers.54
PDF

References

Abolfathi, S., S. Dong, S. Borzooei, A. Yeganeh-Bakhtiari, and J.M. Pearson. 2018. Application of Smoothed Particle Hydrodynamics in Evaluating the Performance of Coastal Retrofits Structures, Coastal Engineering Proceedings, 1(36). https://doi.org/10.9753/icce.v36.papers.109

Besley, P. 1999. Overtopping of seawalls – design and assessment manual. R&D Technical Report W 178, Environment Agency, UK. ISBN 185705069X.

Dong, S., M. Salauddin, S. Abolfathi, Z.H. Tan, and J.M. Pearson. 2018. The Influence of Geometrical Shape Changes on Wave Overtopping: a Laboratory and SPH Numerical Study, Proceedings of Coasts, Marine Structures and Breakwaters Conference 2017, pp. 1217-1226. https://doi.org/10.1680/cmsb.63174.1217

Dong, S., S. Abolfathi, M. Salauddin, Z.H. Tan, and J.M. Pearson. 2020. Enhancing Climate Resilience of Vertical Seawall with Retrofitting - A Physical Modelling Study. Applied Ocean Research, Applied Ocean Research, 103, 102331. https://doi.org/10.1016/j.apor.2020.102331

EurOtop (2018): Manual on wave overtopping of sea defences and related structures. Second Edition.

Fitri, A., R. Hashim, S. Abolfathi, and K. N. Abdul Maulud. 2019. Dynamics of Sediment Transport and Erosion-Deposition Patterns in the Locality of a Detached Low-Crested Breakwater on a Cohesive Coast. Water 2019, 11, 1721. https://doi.org/10.3390/w11081721

Formentin, S.M., B. Zanuttigh, and J.W. van der Meer. A neural network tool for predicting wave reflection, overtopping and transmission. Coastal Engineering Journal, Vol. 59, No. 1 (2017) 1750006. https://doi.org/10.1142/S0578563417500061

Franco, L., M. De Gerloni, and J.W. Van Der Meer. 1994. Wave overtopping on vertical and composite breakwaters, Proceedings of the 24th ICCE, ASCE, Kobe, Japan, pp. 1030-1045.

Hughes, S. A., Thornton, C. I., Van der Meer, J.W., Scholl, B. N. 2012. Improvements in describing wave overtopping processes. In: Proceedings of ICCE 2012, ASCE, Santander, Spain. https://doi.org/10.9753/icce.v33.waves.35

Mansard, E. P. D., and E.R. Funke. 1980. The measurement of incident and reflected spectra using a least squares method, Coastal Engineering, 154–172.

Powell, K.A. 1990. Predicting short term profile response for shingle beaches, HR Wallingford, Report SR 219.

Salauddin, M., A. Broere, J.W. Van der Meer, H.J. Verhagen, E. Bijl. 2017. First Tests on the Symmetrical Breakwater Armor Unit Crablock. Coastal Engineering Journal, 59 (4), 1-33. https://doi.org/10.1142/S0578563417500206

Salauddin, M. and J.M. Pearson. 2018. A laboratory study on wave overtopping at vertical seawalls with a shingle foreshore. Coastal Engineering Proceedings, 1(36), waves.56. https://doi.org/10.9753/icce.v36.waves.56

Salauddin, M. and J.M. Pearson. 2019a. Wave overtopping and toe scouring at a plain vertical seawall with shingle foreshore: A Physical model study. Ocean Engineering, 171, 286-299. https://doi.org/10.1016/j.oceaneng.2018.11.011

Salauddin, M. and J.M. Pearson. 2019b. Experimental Study on Toe Scouring at Sloping Walls with Gravel Foreshores. Journal of Marine Science and Engineering, 7, 198. https://doi.org/10.3390/jmse7070198

Salauddin, M. and J.M. Pearson. 2020. Laboratory investigation of overtopping at a sloping structure with permeable shingle foreshore. Ocean Engineering, 197 (1), 1-13. https://doi.org/10.1016/j.oceaneng.2019.106866

Salauddin, M. J.J. O’Sullivan, S. Abolfathi, and J.M. Pearson. 2020. Extreme wave overtopping at ecologically modified sea defences. 22nd EGU General Assembly, 6162, https://doi.org/10.5194/egusphere-egu2020-6162

Van der Meer, J. W., and W. Janssen. 1995. Wave run-up and wave overtopping at dikes, In: Kabayashi and Demirbilek (Eds.), Wave Forces on Inclined and Vertical Wall Structures, American Society of Civil Engineers, pp 1-27.

Van der Meer, J. W., and T. Bruce. 2014. New physical insights and design formulas on wave overtopping at sloping and vertical structures. Journal of Waterway, Port, Coastal, and Ocean Engineering 140(6), 04014025.

Van Gent M.R. 2002. Wave overtopping events at dikes. Proceedings of the 28th International Coastal Engineering Conference, vol. 2. World Scientific, 2203-2215.

Victor, L. and P. Troch. 2012. Wave overtopping at smooth impermeable steep slopes with low crest freeboards. Journal of Waterway, Port, Coastal, and Ocean Engineering, 372–385. https://doi.org/10.1061/(ASCE)WW.1943-5460.0000141

Victor, L., J.W. Van der Meer, and P. Troch. 2012. Probability distribution of individual wave overtopping volumes for smooth impermeable steep slopes with low crest freeboards. Coastal Engineering, 64, 87–101. https://doi.org/10.1016/j.coastaleng.2012.01.003

Yeganeh-Bakhtiary, A., H. Houshangi, F. Hajivalie, and S. Abolfathi. 2017. A Numerical Study on Hydrodynamics of Standing Waves in Front of Caisson Breakwaters with WCSPH Model, Coastal Engineering Journal, 59:1, 1750005-1-1750005-31, DOI: 10.1142/S057856341750005X

Yeganeh-Bakhtiary, A., H. Houshangi, and S. Abolfathi. 2020. Lagrangian two-phase flow modeling of scour in front of vertical breakwater. Coastal Engineering Journal, 62:2, 252 - 266, DOI: 10.1080/21664250.2020.1747140

Zanuttigh, B., J.W. Van Der Meer, T. Bruce, and S. Hughes. 2013. Statistical characterisation of extreme overtopping wave volumes. Proceedings of ICE, Coasts, Marine Structures and Breakwaters, ICE, Edinburgh, UK.

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.