The average wave overtopping discharge for a composite slope: A case study to the Afsluitdijk rehabilitation project

“During the last safety assessment of Rijkswaterstaat in 2006 the Afsluitdijk failed on the current safety standards regarding flood protection. A new design was needed which ensured continuous protection against flooding in the future. Large scale and small scale tests are performed to optimize the design. Clear differences in the average wave...

Quantifying the effect of woody vegetation on the wave loads on a dike using remote sensing: Large scale physical model tests

It is already acknowledged that Nature-based Solutions can be used to attenuate waves, however it is still uncertain to what extent the vegetation can contribute to decreasing the flood risk. So far mainly small-scale tests have been performed to quantify wave attenuating properties of vegetation. To quantify the effect of more extreme wave...

Incident, infragravity and very low frequency wave motions on an atoll reef platform

Coral reefs are hard structures that front many coasts in tropical and subtropical climates and protect them against wave attack and erosion. Despite reducing incoming wave energy by up to 98%, coral reefs are not a guarantee that mainland or island coasts are safe from being flooded. This was demonstrated by a series of wave-driven flooding...

The influence of armour layer and core permeability on the wave run-up

In JUMELET [2010] a method with a physical basis (so called “Volume Exchange model”) to determine the ‘notional’ permeability coefficient P was developed. The ‘notional’ permeability coefficient was previously introduced in the stability formula of the armour layer; see VAN DER MEER [1988]. In this latter study this coefficient was empirically...

Numerical modeling of wave run-up on a dike: Simulations with the VOF-model ComFLOW

Wave fields in the close vicinity of a coastal structure can be very complex, this is especially the case during extreme storm conditions and for complex geometries. There is a growing interest for numerical simulation tools capable of predicting in detail the complex hydrodynamic loads due to waves and currents and its effect at structures. In...

Evaluation of the Volume-Exchange Model using Van der Meer Laboratory Tests Results

This study extends the theoretical approach developed by JUMELET [2010] to acquire a physical description of the notional permeability coefficient applied in the VAN DER MEER stability formulae [1988]. Van der Meer introduced this coefficient to ensure that the permeability of the structure is taken into account, however due to the empirical...

The influence of core permeability on armour layer stability

This study describes a theoretical approach of a physical description of the notional permeability factor in the stability formulae of Van der Meer [1988]. Caused by the empirical character of these stability formulae a physical description is not available for the notional permeability factor. In practice this leads to ambiguities in...

Wave run-up on a rough, permeable slope of a rubble mound breakwater

Although a lot is known nowadays about the run-up on smooth and impermeable slopes as well as the run-up on slopes covered with a rock armour layer, the physical properties of the armour layer of a rubble mound breakwater are not incorporated in the relations describing the run-up on a breakwater’s slope. The roughness of a slope and its...

Golfoploop op dijken met ondiep voorland

kruinhoogte. Een te lage dijk kan onder extreme omstandigheden bezwijken, waarna inundatie van het achterliggende land volgt. Een te hoge dijk daarentegen betekent dat onnodig hoge aanlegkosten. Het is dus van groot belang de benodigde kruinhoogte van een dijk nauwkeurig te kunnen bepalen. Twee belangrijke faetoren die de benodigde kruinhoogte...

Golfvervorming bij een hoog voorland

Het rapport "Literatuuronderzoek bij een hoog voorland" bevat een systematische weergave van de bestaande kennis van het gedrag van golven in een bepaalde ondiepte-situatie. Die situatie betreft een tamelijk vlak, relatief hoog liggend voorland voor een kust met daar boven een geringe waterdiepte, en wel het gebied vanaf de lijn waar de golven...

Mathematisch model voor de berekening van golfoploop

Rekenmodel voor het berekenen van de golfoploop van onregelmatige golven op een talud. Het programma berekent het profiel van de golfoploop.

Experimenteel onderzoek naar het gedrag van tegen taluds oplopende regelmatige golven

Experimental research on wave run-up of regular waves on smooth slopes. Detailed run-up measurements and derivation of a run-up formula. A mathematical model to describe run-up. Some notes about wave overtopping