FIELD MEASUREMENTS OF WAVE INTERACTIONS WITH A DIKE ON A SHALLOW FORESHORE USING AN “ARTIFICIAL DIKE” CONCEPT

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