Performance of a spectral wind-wave model in shallow water

Predicting Storm Surges: Chaos, Computational Intelligence, Data Assimilation, Ensembles

Accurate predictions of storm surge are of importance in many coastal areas. This book focuses on data-driven modelling using methods of nonlinear dynamics and chaos theory for predicting storm surges. A number of new enhancements are presented: phase space dimensionality reduction, incomplete time series, phase error correction, finding true...

Deterministic prediction of waves and wave induced vessel motions: Future telling by using nautical radar as a remote wave sensor

With many operations at sea carried out by ships or or other floating vessels, risks are involved because of the waves and resulting motions of the ships. Examples are the landing of helicopters on ships, transferring crew from a ship to a wind turbine, or working on the deck of an anchor handling tug. It is common practice to assess the...

Deterministic vessel motion prediction based on a wave radar forecast

A new development aiming to improve the safety and/or operability of offshore operations is deterministic motion forecasting. Various parties target at developing a radar which is able to detect wave trains. This deterministic wave forecast can be used to forecast vessel motions up to several minutes ahead. With such a forecast a quiescent...

Deterministic Wave Prediction as Support for Launch & Recovery Operations: A study into applications of the waveradar in the Feadship Comfort System

Experience-based decision making by crew plays a key role in the safe and effective execution of maritime operations. For yachts and naval vessels, common operations can be identified as helicopter operations (take-off and landing), launch and recovery of small craft and (dis)embarkment to and from these small craft. All of these operations are...

Improved calculation method for the workability during pipe laying: Composition of a standard format

To support cost calculations for tendering a pipe lay project, the influence of weather conditions has to be incorporated by applying workability predictions for the pipe lay vessel. When assuming constant good weather conditions it is possible to accurately determine the duration of an offshore pipe lay project. In practice however, changing...

Wave propagation under influence of currents

The present study aims to assess the prediction of wave penetration into tidal inlets under ambient current in SWAN. The performance of SWAN in the modelling of wave-current interaction was studied for two field cases, namely Port Phillip Bay Heads, Australia, and the Amelander Zeegat in the Dutch Wadden Sea. In-situ wave observations were...

SWAN prediction of nearshore wave climate at Nam Dinh coast in Vietnam

Among a variety of elements, the nearshore wave climate is considered to be the most important aspect to explain erosion problems along the coast. Due to the fact that available data is limited, numerical models are valuable and necessary tools to apply. This study is initiated with the main objective to study the nearshore wave climate of the...

On the determination of the temporal and spatial evolution of extreme events

The current computations of the Hydraulic Boundary Conditions rely mostly on the distribution of the basic variables at the peak of the storms. As a means of improving the quality of the numerical modelling with a view towards the 2017 assessment, it is envisaged that the numerical models (e.g. the wave model) will in the future use time and...

Synthesis of SBW belastingen

The Dutch Water Act (in Dutch: 'Waterwet 2009') stipulates that water boards must assess the quality of their primary water defences every six years. The Statutory Safety Assessment Suite (in Dutch: 'Wettelijk Toetsinstrumentarium', or shortly WTI) prescribes the rules to be applied. The WTI mainly comprises of the Safety Test Regulations (VTV),...

Hydro-dynamics in the Wadden Sea during storm conditions: Analysis of storms of 1 Nov. 2006 and 18 Jan. 2007.

For two historical storms the water levels and currents in the Wadden Sea were simulated using the so-called model-train of Rijkswaterstaat. The first storm of 1 Nov. 2006 generated exceptionally high water levels in the Eems-Dollard estuary. The second storm of 18 Jan. 2007 was also scaled up to represent a 1 in 4000 year design storm. In...

A numerical wave prediction model DOLPHIN: Theory and test results

This report gives the basic theory of ocean waves and ocean wave prediction and a description of the physical background and of tests of the wave hindcast model DOLPHIN.

Hindcast tidal inlet of Ameland storms: January and March 2007

During the storm season from October 2006 untill April 2007 several severe storms occurred at the North Sea. Three storm periods are selected to study the realiability of the SWAN wave model by means of a hindcast. The objective of this hindcast is to gain insight into the performance of the SWAN model, especially under storm conditions for the...