Searched for: subject%3A%22wave%255C-transmission%22
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Wang, G. (author), Bar, Daniel (author), Schreier, S. (author)
This study examines the potential of a new type of floating seawall, made up of retired large-scale oceangoing vessels, to be used in open water and exposed coastal areas. The main objectives of the research are to assess the effectiveness of the floating seawall concept, to determine the contribution of the gap resonance to wave attenuation,...
journal article 2024
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Jonker, R. G. (author), AlYousif, A.Y. (author), Hofland, Bas (author), Antonini, A. (author), Zoon, Arthur (author), Smith, Gregory (author)
This study treats a detached homogenous low-crested structure (HLCS) made of Cubipod concrete elements placed seaward of a vertical wall (forming a basin in between) to reduce overtopping. Assessing the complex hydrodynamics and effects of changing the geometry of such a system in relation to overtopping reduction is challenging. The...
journal article 2024
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Speth, Florine (author)
Coral reefs are considered to be a crucial ecosystem and form of natural coastal protection. They owe their effectiveness to their high structural complexity. This complexity, which positively influences aspects like species richness, coral recovery, live coral cover, and coastal protection, is often quantified using parameters such as porosity...
master thesis 2023
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van Gent, M.R.A. (author), Buis, L. (author), van den Bos, J.P. (author), Wüthrich, D. (author)
Wave transmission at low-crested coastal structures has been studied, based on physical model tests with trapezoidal impermeable, permeable and perforated structures. The differences between wave transmission at impermeable and permeable structures are relatively limited. For a perforated hollow structure with an impermeable vertical screen...
journal article 2023
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Buis, Lisanne (author)
In this research, the influence of the permeability and the porosity of artificial reefs on wave transmission and the sheltered habitat of marine life is investigated. A physical model is used to find the answer to this question. <br/>The main finding of this research is that a hollow, perforated structure can act both as an artificial reef that...
master thesis 2022
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Jonker, Ruben (author)
In this research OpenFOAM is used to model and determine the complex hydrodynamic behaviour of a Homogeneous low-crested structure (HLCS) consisting of cubipod artificial concrete elements. The validated model is used to gain insight in the design sensitivities of a two dimensional cross sectional layout to reduce sea wall overtopping. HLCS and...
master thesis 2020
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Zheng, Siming (author), Antonini, A. (author), Zhang, Yongliang (author), Miles, Jon (author), Greaves, Deborah (author), Zhu, Guixun (author), Iglesias, Gregorio (author)
A rectangular barge consisting of multiple oscillating water columns (OWCs) is considered in this paper, hereinafter referred to as a multi–OWC platform. Each OWC chamber is enclosed by two partially submerged vertical walls and the deck of the platform. An incident wave produces oscillation of the water column in each OWC chamber and hence air...
journal article 2020
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Stive, M.J.F. (author), Phan, L. K. (author), Truong, S. T. (author), Phan, H. M. (author), Dao, H. T. (author)
Over the last few decades, the Mekong Delta Coast has undergone many physical changes that have increased its vulnerability. Issues that have grown in importance are erosion, human occupation of coastal and estuarine mangroves, decreased sediment supply by the Mekong River and subsidence due to groundwater extraction. These issues have led to...
conference paper 2020
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Aulbers, Rik (author)
In this research, a Shive wave machine is used to study (a) the velocity of waves<br/>throughout different media and (b) the transition of waves between two different<br/>media. The Shive wave machine used in this research consists of 32 parallel<br/>aluminum bars attached perpendicularly to three parallel central wires. When<br/>a perturbation...
bachelor thesis 2019
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Tavouktsoglou, N.S. (author)
Wave transmission is a very important design parameter for submerged porous breakwater design, as it defines the dimensions of the breakwater as well as the cost and construction process. The spatial distribution of the wave transmission parameter influences the current pattern on the lee of the breakwater and therefore the sediment transport...
master thesis 2013
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Biesheuvel, A.C. (author)
From previous engineering projects it turned out that it is difficult to determine the transmitted wave height of floating breakwaters without performing physical models or using numerical models. In this thesis it is investigated which steps should be taken during the preliminary design process in order to predict the effectiveness (wave...
master thesis 2013
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Van Neer, P.L.M.J. (author), Danilouchkine, M.G. (author), Verweij, M.D. (author), Demi, L. (author), Voormolen, M.M. (author), Van der Steen, A.F.W. (author), De Jong, N. (author)
In medical ultrasound, fundamental imaging (FI) uses the reflected echoes from the same spectral band as that of the emitted pulse. The transmission frequency determines the trade-off between penetration depth and spatial resolution. Tissue harmonic imaging (THI) employs the second harmonic of the emitted frequency band to construct images....
journal article 2011
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VanLishout, V. (author), Verhagen, H.J. (author), Troch, P. (author)
There is a growing interest in the application of submerged rubble mound breakwaters as coastal defence structures. As their defensive ability highly depends on the amount of wave energy remaining at their lee side, the accurate prediction of the energy in the lee of such structures is of utmost importance. Past experiments have shown that the...
conference paper 2011
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Quynh, V.V. (author)
Field investigation by Vuong Van Quynh on the dissipation of wave energy in a mangrove field off the coast of southern Vietnam. Based on regression analysis a formula has been developed to determine the wave height decrease as function of the tree density and the tree sizes.
report 2010
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Vanlishout, V. (author), Verhagen, H.J. (author), Troch, P. (author)
There is a growing interest in the application of submerged rubble mound breakwaters as coastal defence structures. As their defensive ability highly depends on the amount of wave energy remaining at their lee side, the accurate prediction of the energy in the lee of such structures is of utmost importance. Past experiments have shown that the...
conference paper 2010
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Schakel, M.D. (author), Smeulders, D. (author)
The dispersion relation for seismoelectric wave propagation in poroelastic media is formulated in terms of effective densities comprising all viscous and electrokinetic coupling effects. Using Helmholtz decomposition, two seismoelectric conversion coefficients are derived, for an incident P-wave upon an interface between a compressible fluid and...
journal article 2010
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Van der Hout, C.M. (author)
For local protection of coastal stretches where buildings are situated in or form part of the coastal defense line the deep water reef concept has been developed. Two reef concepts were designed; a shore-parallel breakwater (of 3 km length) and a segmented breakwater (three blinds of 1 km length), both located in 10 m water depth at 1.5 km off...
master thesis 2008
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Vanlishout, V. (author)
Low crested structures are primarily designed as a coastal defence mechanism, making the prediction of the energy in the lee of the structure of utmost importance. As wave transmission is a measure for the energy that passes the breakwater, experiments on oblique wave transmission have previously been performed by the European project DELOS ...
master thesis 2008
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Van Oosten, R.P. (author), Peixó Marco, J. (author), Van der Meer, J.W. (author), Van Gent, M. (author), Verhagen, H.J. (author)
The European Union funded project DELOS was focused on wave transmission and an extensive database on low-crested rubble mound structures was generated. During DELOS, new empirical wave transmission formulae were derived. These formulae still showed a considerable scatter due to a limited number of parameters included. Neural networks based on a...
conference paper 2006
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Schiereck, G.J. (author), Booij, N. (author)
There is an increasing awareness of the role of mangrove forests in coastal ecosystems and coastal protection. At the transition between ocean and land, they have to absorb the energy that comes from the motion of the water. Little quantitative in formation is available, however, on wave transmission in these forests. In this paper the...
conference paper 1995
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