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Water 2017, 9(9), 663; https://doi.org/10.3390/w9090663

Modelling Extreme Wave Overtopping at Aberystwyth Promenade

College of Engineering, Swansea University, Fabian Way, Swansea SA1 8EN, UK
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Received: 29 June 2017 / Accepted: 24 August 2017 / Published: 14 September 2017
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Abstract

The work presents a methodology to assess the coastal impacts during a storm event which caused significant damage along the promenade at Aberystwyth, Wales on the 3 January 2014. Overtopping was analysed in detail for a section of promenade by downscaling offshore wave conditions to force a surf zone hydrodynamic model, NEWRANS. Overtopping discharges are computed and were in qualitative agreement with published discharges for the level of damage observed along the promenade. Peak storm conditions were observed to arrive just before and during high tide at Aberystwyth, which in addition to a storm surge and wave-setup, contributed to the damage observed. A high frequency of overtopping occurs during peak high tide, with overtopping also occurring in the hour leading up to and following high tide. Finally, comparisons to design methods for the estimation of overtopping discharge were made. Current empirical formulae underestimated the peak overtopping event at high tide. The methodology applied is generic and applicable to any location. View Full-Text
Keywords: wave overtopping; coastal flooding; modelling; extreme events wave overtopping; coastal flooding; modelling; extreme events
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Thompson, D.A.; Karunarathna, H.; Reeve, D.E. Modelling Extreme Wave Overtopping at Aberystwyth Promenade. Water 2017, 9, 663.

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