A comparison of wave spectra reconstruction methods

Infragravity (IG) waves are long waves whose frequency ranges between 0.005 Hz to 0.04 Hz. The directional properties of IG waves are essential in various engineering fields, but few spectra reconstruction methods have been tested to be robust for the last forty years. In this study, artificial wave signals were created to check the accuracy and...

Workability prediction for the Ampelmann A-type: a comparative study of different spectral wave models

Comparative study into the effects of applying different spectral wave models to workability prediction of the Ampelmann A-type. Single peaked (wind sea), double peaked (wind sea and swell), and hindcast wave spectra are compared.

Developing the optimal design solution for Jumbo to increase the offshore stability of a heavy crane lift vessel

Jumbo maritime has almost 50 years of experience in the heavy shipping industry. In the past two decades Jumbo has developed into an offshore installation company by equipping the Fairplayer with a DP2 system. The Fairplayer has two 900 [ton] Huisman cranes. However, due to insufficient static stability a stabilization pontoon is required to...

A method to calculate the probability of dike failure due to wave overtopping, including the infragravity waves and morphological changes

In this thesis, a method was developed, with which the infragravity waves and morphological changes of a sandy foreshore are included in the calculation of the probability of dike failure due to wave overtopping. Constructing a natural foreshore in front of the dike can be an attractive and innovative method to decrease the failure probability....

Analysis of Spectra, Wave Grouping and Long Wave Phenomena of Real Measured Waves in Coastal Waters

Real coastal waves measured at 4 different locations in the world were analyzed in detail. Long travelled swell measured in the Pacific coast of Costa Rica, wind swell from the Atlantic coast of Costa Rica, short period wind waves from the Ebro Delta in Mediterranean coast of Spain, and waves measured during the passing of Hurricane Wilma near...

Analysis and modelling of wave spectra on the Caspian Sea

The discovery of great oil reserves located under the northern part of the Caspian Sea has lead to an increased interest in the wave climate in this area. Statistical analysis of wave measurements is insufficient to determine reliable design wave conditions on the northern part of the Caspian Sea, because the amount of available wave...

Verification of the numerical wave model SWAN in the Petten coastal area

Due to the new act on the water defense the Directorate-General of Public Works and Water Management of the Netherlands is required to evaluate the design conditions for the coastal defenses every five years. To do this evaluation a model is needed to translate offshore wave conditions to nearshore design conditions. For such transformations...