FIELD MEASUREMENTS OF WAVE INTERACTIONS WITH A DIKE ON A SHALLOW FORESHORE USING AN “ARTIFICIAL DIKE” CONCEPT
ICCE 2022
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FIELD MEASUREMENTS OF WAVE INTERACTIONS WITH A DIKE ON A SHALLOW FORESHORE USING AN “ARTIFICIAL DIKE” CONCEPT. (2023). Coastal Engineering Proceedings, 37, structures.100. https://doi.org/10.9753/icce.v37.structures.100

Abstract

Low-lying countries typically have mildly-sloping beaches as part of their coastal defence system. Many countries in north-western Europe have coastal urban areas that rely on this type of defence system, which consists of a lowcrested impermeable sea dike with a relatively short promenade, and a long (nourished) beach in front that acts as a very/extremely shallow foreshore as defined by Hofland (2017). Along the cross-section of this hybrid beach-dike coastal defence system, storm waves are forced to undergo many transformation processes before they finally overtop the dike. These hydrodynamic processes include shoaling, sea and swell wave energy transfer to sub- and superharmonics via nonlinear wavewave interactions, wave dissipation by breaking and bottom friction, reflection against the dike, wave run-up and overtopping on the dike, bore impact on a wall or building, and finally reflection back towards the sea interacting with incoming bores on the promenade. Field measurements of all these processes at the same time are very challenging but necessary since these suffer from neither scale nor model effects. Field data are therefore crucial to evaluate design methodologies, which rely on physical and numerical modelling. This paper presents the field setup and the design features of the innovative artificial dike, unique in the world.
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References

Hofland, Chen, Altomare, Oosterlo (2016): Prediction formula for the spectral wave period Tm-1,0 on mildly sloping shallow foreshores, Coastal Engineering, ELSEVIER, vol. 123, pp. 21-28. van der Meer, Nieuwenhuis, Steendam, Reneerkens,

Steetzel, van Vledder (2019): Wave Overtopping Measurements at a Real Dike, proceedings Coastal Structures 2019, pp. 1107–1117.

Wenneker, Spelt, Peters, de Ronde (2016): Overview of 20 years of field measurements in the coastal zone and at the Petten sea dike in the Netherlands. Coastal Engineering, ELSEVIER, vol. 109, pp. 96–113.

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Copyright (c) 2023 Vincent Gruwez, Marc Willems, Toon Verwaest, Jeroen Hillewaere, Boudewijn Decrop, Peter Troch