document

Recent Developments in the Design of Conventional Rubble Mound Structures

Etemad-Shahidi, Amir (author), van Gent, M.R.A. (author)

Conventional rubble mound structures such as breakwaters, seawalls, and revetments are the most common type of coastal structures around the world used to protect harbour basins and embankments from wave action. To have a safe and economic design, two aspects need to be considered. The first one is the structural stability where the required...

conference paper 2023

document

Extracting Coastal Water Depths from Multi-Temporal Sentinel-2 Images Using Convolutional Neural Networks

Lumban-Gaol, Yustisi (author), Arroyo Ohori, G.A.K. (author), Peters, R.Y. (author)

Satellite-Derived Bathymetry (SDB) can be calculated using analytical or empirical approaches. Analytical approaches require several water properties and assumptions, which might not be known. Empirical approaches rely on the linear relationship between reflectances and in-situ depths, but the relationship may not be entirely linear due to...

journal article 2022

document

Adaptive Learning of Inland Ship Power Propulsion under Environmental Disturbances

Dann, Nicolas (author), Segovia Castillo, P. (author), Reppa, V. (author)

This paper presents an adaptive approximation-based scheme for learning a partially known ship power propulsion plant under various environmental conditions. Considering the effect of water depth on the engine power, a dynamic model is defined comprised of the engine dynamics and the 1-DoF ship manoeuvring dynamics. The modelling challenge is...

journal article 2022

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Time-frequency analysis of ship wave patterns in shallow water: modelling and experiments

Pethiyagoda, R. (author), McCue, S.W. (author), Moroney, T.J. (author), MacFarlane, G.J. (author), Binns, J.R. (author)

journal article 2017

document

The influence of shallow water and hull form variations on inland ship resistance

Rotteveel, E. (author), Hekkenberg, R.G. (author)

Effects of a hull form variation and shallow water on a 110-meter inland ship are presented as preliminary results of the Top Ships project, which is initiated in order to improve inland ship design tools and design guidelines.

conference paper 2015

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Design guidelines and empirical evaluation tools for inland ships

Rotteveel, E. (author), Hekkenberg, R.G. (author), Liu, J. (author)

For inland ships, state-of-the-art hull form design is to a large extent based on experience, common sense, or adjusting previous designs. The idea therefore arises that further optimization is possible if the right knowledge is available. This knowledge is insufficiently available due to two main reasons. First, research into inland ship...

conference paper 2014

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Viscous-flow calculations for KVLCC2 in deep and shallow water

Toxopeus, S.L. (author)

In the SIMMAN 2008 workshop, the capability of CFD tools to predict the flow around manoeuvring ships has been investigated. It was decided to continue this effort but to extend the work to the flow around ships in shallow water. In this paper, CFD calculations for the KLVCC2 are presented. The aim of the study is to verify and validate the...

conference paper 2011

document

Riprap stability for deep water, shallow water and steep foreshores

Verhagen, H.J. (author), Mertens, M. (author)

In the Rock Manual [2007] two sets of equations for the determination of rock stability in breakwaters armour layers are presented. One set is the original formula presented by Van der Meer [1988], valid for deep water conditions. This set uses the parameters Hs and Tm. The other set is an adaptation of these formulae, using the parameters H2%...

conference paper 2009

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Process-based and Surrogate Modelling of Fine Sediment Transport in the Dutch Coastal Zone

Kai, C. (author)

Coastal zones which are known as the interface between continents and oceans are vital and important to human beings because a majority of the world's population live in such zones (Nelson, 2007). Coastal systems are among the most dynamic and energetic environments on earth and they are continuously changing because of the dynamic interaction...

report 2009

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A practical method for design of coastal structures in shallow water

Verhagen, H.J. (author), Van Vledder, G.P. (author), Eslami Arab, S. (author)

Modern design formula for coastal structures (like rock stability formula and overtopping formula use wave parameters (H2% and Tm-1,0) which are not readily available from standard boundary condition wave data. For transforming values like Hs and Tp to the parameters used in the new formulas, often-fixed conversion factors are used. However,...

conference paper 2008

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The effect of foreshore slope on breakwater stability

Verhagen, H.J. (author), Reedijk, B. (author), Muttray, M. (author)

Experience has shown that stability parameters for breakwater armour are different for steep and shallow foreshores, as well as for deep and shallow water. A change from a deep water spectral information (Tm0) to shallow water spectral information (Tm-1,0) does not completely explains this difference. Tests have shown that stability also depends...

conference paper 2006

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Wave growth limit in shallow water: Analytical study of wave growth curves and SWAN source terms

Groeneweg, J. (author), Dingemans, M.W. (author)

report 2003

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On the use of a horizontal k-e model for shallow-water flow

Bijvelds, M.D.J.P. (author), Goede, E.D. de (author)

report 2000

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Spectral modelling of wind waves in coastal areas

Ris, R.C. (author)

doctoral thesis 1997

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Calm Water tests on shallow water for hospital passenger inland vessel "Henry Dunant III"

MARIN (author)

other 1996

document

A Numerical Wave Model for the Refraction and Diffraction of Irregular Waves. Part II: Numerical Experiments of the Wave Model CREON

Gao, Q. (author), Radder, A.C. (author), Booij, N. (author)

The numerical wave model CREON is developed to predict the propagation and transformation of wave properties in shallow water. In Gao et al. (1993), which is referred to as Part I in the following, a description is given of the theoretical and numerical treatment of the model. In the present report, we present various computational results. The...

report 1994

document

Turbulent mixing layers in shallow water

Tukker, J. (author)

This investigation on shallow mixing layers has two main objectives: - To gain insight in the influence of the depth on the evolution of large, horizontal eddies in a lateral mixing layer in a shallow free-surface flow. - To gain insight in the contribution of these eddies to the entrainment into the layer and to the mixing and to the transport...

report 1994

document

Wave Propagation in Shallow Water

Dalrymple, R.A. (author)

The propagation of waves from offshore to onshore is a difficult problem due to the mathematical complexities of the governing equations and the degree of uncertainty of the bathymetry over which the waves must travel. In this lecture, the various methods of transforming offshore wave trains to shallow water are discussed. First, single wave...

report 1992

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Extreme waves and wave loading in shallow water

Klopman, G. (author), Stive, M.J.F. (author)

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...

conference paper 1989

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Computational methods for the vertical distribution of flow in shallow water

Breusers, H.N.C. (author)

report 1973