الفهرس 
Chapter (1) INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Nowadays floating breakwaters are used widely to protect coastlines, seashores, marines……etc. In the past decades a lot of research was carried out to investigate the hydrodynamic behavior of floating breakwaters. Various studies focused on the configuration of the floating breakwater structure to be more efficient in opposing wave attacks. On the other hand, traditional breakwater types which have no permeability are very sufficient in wave damping and reflection, but they showed many problems in sedimentation, scouring and wave currents.
A new type of floating breakwater is proposed in this study. A curved face floating breakwater has been tested experimentally to investigate its hydrodynamic performance. The reflection, transmission, energy dissipation coefficients were measured. A series of experiments were carried out in a two-dimensional wave flume (length 12 m x width 0.5 m x height 0.6 m).
The highlights of this experimental study showed that this new configuration succeed in lowering the transmission coefficient approximately from 5 % to 30 % and around 70 % energy dissipation depending on the used curvature angle, moreover this new system showed a high performance in wave reflection and wave damping. The analysis of these results proved that this new configuration has a good hydrodynamic performance compared with other types of permeable breakwaters.
The experimental results showed that the width, draft and curvature angle of the proposed curved-face floating breakwater are the major parameters that affect wave attenuation.
The conclusions of this study to achieve the best performance of the proposed curved-face floating breakwater are that the submergence of the proposed breakwater should be by a ratio of 2/3 of the total height, as the breakwater width increases the hydrodynamic performance gets better, and the hydrodynamic behavior of the curved face floating breakwater increases by increasing of the concavity degree of the floating breakwater face.