3D wave transmission around permeable submerged breakwaters with the use of Artificial Neural Networks

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...

Effectiveness of Floating Breakwaters: Wave attenuating floating structures

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...

Effects on wave break, sea dike protection of the tree planting formula in the coastal salinity inundated areas

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.

Morphological impact of a deep water reef

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...

Oblique wave transmission through rough impermeable rubble mound submerged breakwaters

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 ...

Wave transmission at low-crested structures using neural networks

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...

Wave transmission in mangrove forests

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...

Effect of submerged breakwater on profile development

This study is part of a Human Capital and Mobility Project called 'Dynamics of Beaches'. This project is a co-operation of six European universities which work together in solving some unknown aspects of a submerged breakwater by means of model experiments. Several agreements about the experiments were made between the partners. These agreements...

Reflection and Transmission Characteristics of Porous Rubble-Mound Breakwaters

This report presents the results of a study of the reflection and transmission characteristics of porous rubble-mound breakwaters. An attempt was made at making the procedures entirely self-contained by introducing empirical relationships for the hydraulic characteristics of the porous material and by establishing experimentally an empirical...

Wave transmission through rock structures

Application of the energy method leads to a theoretical expression of the coefficient of transmission through a prismatic structure, constructed from rocks of uniform size, for long waves traversing the structure. When the dissipation in the voids is due partly to turbulent forces, the transmissions are expressed by a power formula . The formula...