Technisch rapport Duinafslag

De TAW Leidraad Duinafslag van 1984 is vervangen door dit Technisch Rapport Duinafslag 2006 (TRDA2006). De hoofdreden daarvoor is dat er indertijd bij het opstellen van de Leidraad 1984 niet voldoende rekening is gehouden met het effect dat de golfperiode heeft op de mate van duinafslag. Metingen van golfkarakteristieken hebben inmiddels laten...

Havendammen van IJmuiden, modelonderzoek

De Bouwdienst van Rijkswaterstaat heeft WL Delft Hydraulics opdracht gegeven voor het uitvoeren van 2D fysisch modelonderzoek ten behoeve van een mogelijke renovatie van de havendammen van IJmuiden. Het betreft enerzijds modelonderzoek om meer inzicht te verkrijgen in mogelijk optredende schademechanismen bij de huidige constructie (Proevenserie...

Final report on generic prediction method of wave overtopping

Within the framework of the European project CLASH phenomena related to wave overtopping are studied. In this report a method to predict wave overtopping at a wide range of coastal structure types is given. The method is based on Neural Network modelling of the mean wave overtopping discharge. The method can be applied for coastal structures...

Neural network manual for NN_Overtopping program

Following this general introduction, Chapter 2 provides the structure of the program and the description of the parameters involved in the prediction tool. Then, Chapter 3 provides an explanation of the estimation and schematisation of the hydraulic and structure parameters. Finally, Chapter 4 describes the use of NN_OVERTOPPING 2, including: i....

The international database on wave overtopping

One of the main objectives within the EU-project CLASH (www.clash-eu.org) was to create a generic prediction method for wave overtopping at coastal structures by means of the Neural Network technique. An extensive and homogeneous database on wave overtopping was set up within CLASH, mainly with the aim to be used for the training process of the...

Influence of low-frequency waves on wave overtopping; a study based on field measurements at the Petten Sea-defence

Within the framework of the European project CLASH phenomena related to wave overtopping are studied. One of the topics that require further attention is the influence of low-frequency waves on wave overtopping. Here, use is made of field measurements performed at the Petten Sea-defence (by Rijkswaterstaat and made available by RIKZ) and...

Stability of near-bed structures and bed protections: Analysis of physical model tests with waves and currents

In river and coastal engineering bed protections and near-bed rubble mound structures are often used to protect other structures such as river groins, pipelines and intake- and outfall structures for power-stations and desalination plants. From river engineering relatively extensive information is available for bed protections with currents as...

Numerical modelling of wave interaction with dynamically stable structures

Wave interaction with dynamically stable structures is simulated by means of a numerical model based on fmite-amplitude shallow-water wave equations. The model can simulate wave motion on and inside permeable structures. For dynamically stable structures, including berm breakwaters, reef-type structures and gravel beaches, a procedure is...

Wave interaction with berm breakwaters

Wave interaction with berm breakwaters is studied by means of a physical model and a numerical model. The physical-model tests have been used to verify the wave motion as calculated by the numerical model. The numerical model based on finite-amplitude shallow-water wave equations is capable of simulating the wave motion both on and inside the...

Berm breakwater structures: Numerical simulation of breaking waves

A two-dimensional numerical model that can simulate plunging waves on permeable structures is described. The 'Volume Of Fluid' method is used to solve the incompressible Navier-Stokes equations (2DV). This enables simulations with very complex shapes of the free surface like those occurring in breaking waves. The model has been extended with...

Berm breakwater structures: Dynamically stable structures and their natural response to wave attack

Wave interaction with dynamically stable structures is studied by means of a verified numerical model. The model can simulate wave motion on and in permeable structures. For dynamically stable structures, including gravel beaches, berm breakwaters and reef-type structures, a procedure is developed to simulate the natural response to wave attack....

SKYLLA: Wave motion in and on coastal structures, gebruikers handleiding

In de voor u liggende gebruikers handleiding vindt u een beschrijving van de van in- en uitvoer files en practische overwegingen die het gebruik van het programma SKYLLA kunnen vereenvoudigen. Opgemerkt moet worden dat het programma SKYLLA nog in ontwikkeling is zodat wat vandaag in de gebruikers handleiding geschreven wordt morgen reeds...

Odiflocs: Computations for a berm breakwater

Computations made with the numerical model Odyflocs and compared with Skylla computations. Water pressures and water movements near the surface of a berm breakwater are computed.