Extreme Waves in the North Sea: Deriving extreme wave conditions applying Hierarchical Clustering and Non-Stationary Extreme Value Modelling

Coastal and offshore infrastructure must be designed to withstand extreme wave-induced loading conditions. Extreme Value Analysis (EVA) is often employed to infer probabilistic distributions that provide information about extreme design conditions. In traditional practices, EVA is performed under the assumption of stationarity. This means that...

Rogue waves in the Dutch North Sea: An experimental study into the occurrence of extreme waves due to abrupt depth transitions at future offshore wind farm locations along the Dutch coast

Large morphological features, so-called sand ridges, with an average height and length in the order of 10 meters and 3 kilometers respectively are located at future offshore wind farm locations in the Dutch North Sea. Recent literature, considering relatively deep water conditions (kh 1, with k the wave number and h the water depth), has shown...

The commotion project: Computational methods for moving and deforming objects in extreme waves

Statistical Analysis of Wave Climate Data Using Mixed Distributions and Extreme Wave Prediction

Free-surface flow simulations for moored and floating offshore platforms

During the development of the ComFLOW simulation method many challenges have to be tackled concerning the flow modelling and the numerical solution algorithm. Examples hereof are wave propagation, absorbing boundary conditions, fluid–solid body interaction, turbulence modeling and numerical efficiency. Some of these challenges will be discussed...

Validation of extreme wave and crest height distribution: Using laboratory simulation and field measurement data

This thesis has focussed on the validation of extreme wave and crest height distribution. The empirical distribution was simulated based on laboratory and field measurement water elevation data. Both sets of data indicated the presence of abnormal wave ensuring the extreme condition aimed at in this study. The literature review was performed to...

Example of the determination of a design storm

Example for the the dataprocessing of wave data in such a way that design values for coastal structures can be determined

The maximum significant wave height in the Southern North Sea

The maximum possible wave conditions along the Dutch coast, which seem to be dominated by the limited water depth, have been estimated in the present study with numerical simulations. Discussions with meteorologists suggest that the maximum possible sustained wind speed in North Sea conditions is between 40 and 50 m/s (roughly equal to the wind...

Extreme waves and wave loading in shallow water

As an alternative to a more or less standard derivation procedure for design wave heights in relatively shallow water, two improvements of the procedure are suggested which lead to less conservative results. These improvements are based on observations of shallow water effects on both the decay of total wave energy density and on the extreme...