Searched for: author%3A%22Van+Gent%2C+M.R.A.%22
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Chen, W. (author), Warmink, J.J. (author), van Gent, M.R.A. (author), Hulscher, S.J.M.H. (author)
The mean overtopping discharge and the overtopping flow parameters related to individual overtopping events are often used to characterize the wave overtopping processes at dikes. Roughness, berms and oblique waves have significant effects on the wave overtopping processes at dikes while these effects are still not fully understood. A 2DV...
journal article 2022
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Koosheh, Ali (author), Etemad-Shahidi, Amir (author), Cartwright, Nick (author), Tomlinson, Rodger (author), van Gent, M.R.A. (author)
Seawalls play a significant role in protecting coastal areas against wave attack and flooding. The accurate estimation of wave overtopping at seawalls is therefore crucial to adequately protect people and infrastructure in these regions. In this study, the mean wave overtopping rate at rubble mound seawalls was investigated through 140 small...
journal article 2022
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Yuksel, Yalcin (author), van Gent, M.R.A. (author), Cevik, Esin (author), Kaya, Alper Hasan (author), Ari Guner, H. Anil (author), Yuksel, Z. Tugce (author), Gumuscu, Irem (author)
The performance of high-density cubes in the armor layer of a breakwater was investigated through an experimental study. For this purpose, two different cross-sections, one with a conventional cross-section and one with a berm, were modelled in a wave flume. A total of ten tests were performed for both cross-sections. Different concrete...
journal article 2022
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Koosheh, Ali (author), Etemad-Shahidi, Amir (author), Cartwright, Nick (author), Tomlinson, Rodger (author), van Gent, M.R.A. (author)
For a safe design of a rubble mound seawall, overtopping characteristics such as the mean overtopping discharge (q) and the maximum individual overtopping volume (V<sub>max</sub>) should be limited. Unlike q, the estimation of V<sub>max</sub> is more complex and requires a wave-by-wave analysis of overtopping as well as a statistical analysis...
journal article 2022
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van Gent, M.R.A. (author), Wolters, Guido (author), Capel, Alex (author)
Physical model tests have been performed to study wave overtopping at rubble mound breakwaters, including breakwaters with a crest wall, breakwaters with a berm, and breakwaters with a crest wall and a berm. For rubble mound structures with a protruding crest wall or with a stable berm, limited information is available in literature even...
journal article 2022
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Etemad-Shahidi, Amir (author), Koosheh, Ali (author), van Gent, M.R.A. (author)
Estimation of the mean overtopping discharge is a major task in the design and assessment of the crest level of rubble mound structures such as breakwaters and seawalls. The tolerable mean overtopping rates are given based on the associated risk and wave characteristics. Several empirical formulas have been developed for the prediction of...
journal article 2022
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den Bieman, Joost P. (author), van Gent, M.R.A. (author), van den Boogaard, Henk F.P. (author)
Coastal structures are often designed to a maximum allowable wave overtopping discharge, hence accurate prediction of the amount of wave overtopping is an important issue. Both empirical formulae and neural networks are among the commonly used prediction tools. In this work, a new model for the prediction of mean wave overtopping discharge is...
journal article 2021
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van Gent, M.R.A. (author)
The amount of wave overtopping at coastal structures such as vertical caisson breakwaters is strongly dependent on the angle of wave attack. The reducing effects of oblique waves on wave overtopping compared to perpendicular wave attack has been studied by means of three-dimensional wave basin tests. In these physical model tests the caisson...
journal article 2021
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Etemad-Shahidi, Amir (author), Bali, Meysam (author), van Gent, M.R.A. (author)
Toe design is an important task for coastal engineers as it ensures the stability of the main armor layer and prevents scour in front of the armor slope. Several laboratory experiments have been conducted to investigate the toe stability using different testing approaches, i.e. damage due to a single test condition and cumulative damage due...
journal article 2021
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Koosheh, Ali (author), Etemad-Shahidi, Amir (author), Cartwright, Nick (author), Tomlinson, Rodger (author), van Gent, M.R.A. (author)
Conventionally, allowable mean overtopping discharge is used as a design criterion for coastal structures. The mean overtopping discharge needs to be limited to ensure structural stability as well as the safety of people, vehicles, and properties behind the structure. Nowadays, limits for the maximum individual overtopping volumes are also...
review 2021
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Van de Graaff, J. (author), Van Gent, M.R.A. (author), Boers, M. (author), Diermanse, F.L.M. (author), Walstra, D.J. (author), Steetzel, H.J. (author)
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...
report 2007
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Kuiper, C. (author), Van Gent, M.R.A. (author)
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...
report 2006
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Van Gent, M.R.A. (author), Pozueta, B. (author), Van den Boogaard, H.F.P. (author), Medina, J.R. (author)
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...
report 2005
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Coeveld, E.M. (author), Van Gent, M.R.A. (author), Pozueta, B. (author)
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....
report 2005
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Steendam, G.J. (author), Van der Meer, J. (author), Verhaeghe, H. (author), Besley, P. (author), Franco, L. (author), Van Gent, M.R.A. (author)
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...
report 2004
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Van Gent, M.R.A. (author), Giarusso, C.G. (author)
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...
report 2003
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van Gent, M.R.A. (author)
report 2002
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Van Gent, M.R.A. (author), Wallast, I. (author)
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...
report 2001
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van Gent, M.R.A. (author)
report 2001
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Van Gent, M.R.A. (author)
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...
report 1997
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