Nearshore waves and related wave overtopping in complex estuaries

This dissertation focuses on the Eems-Dollard estuary in the north of the Netherlands and contributes to the MVED (’Meerjarige Veldmetingen Eems-Dollard’) field measurement project in the area. The Eems-Dollard estuary is part of the Wadden Sea, a shallow shelf sea with barrier islands, deep tidal channels, shallow tidal flats and wetlands. The...

The Influence of Infragravity Waves on Overtopping at Coastal Structures with Shallow Foreshores

Coastal communities across the globe are often protected by structures, such as seawalls, levees or dikes, which allow only a safe volume of water to pass over or “overtop” them due to wave action during storms. The area seaward of these structures is often characterised by shallow, gently sloping beds referred to as foreshores.<br/>As storm...

Physical model tests on new armour block Crablock for breakwaters to come to preliminary design guidance

In the design of rubble mound breakwaters, nowadays single layer systems using concrete armour units have become more common practice compared to conventional two layer systems. However, after the introduction of the accropode in eighties, a small number of single layer armour units have been developed over the years; for example core-loc, A...

Set-up to design guidance for the Crablock armour unit

The Crablock is a symmetrical unit, this in contrast to the units that have been applied most in the past. Essentially, this is the main difference. All other units have six “obstacles” that insure interlocking, but they are not symmetrical. All those units are placed randomly in a certain way with more or less contacts to neighbouring units. A...

Taluds van losgestorte materialen: Golfneerloop op statisch stabiele stortsteen taluds onder golfaanval

In dit verslag worden neerloopmetingen gepresenteerd en geanalyseerd welke zijn verkregen uit onderzoeken naar de statische stabiliteit van stortsteen taluds onder golfaanval. De analyse van deze proeven heeft geleid tot de relatie voor de relatieve neerloop die door 2% van de neerlopen wordt overschreden. Deze empirische relatie wordt...

Taludbekleding van gezette steen: Overzicht onderzoek 1980-1984, samenvattend verslag

In Nederland zijn veel laaggelegen gebieden beschermd tegen overstroming d.m.v. dijken. De opdracht van de Deltacommissie betreffende de veiligheid luidt dijken te bouwen die nog volledige zekerheid bieden bij een waterstand en golfaanval, die ver uitgaan buiten het ervaringsgebied. Voor het ontwerpen van dijken die bestand zijn tegen deze...