الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 122 |  |  |
| | | from | 122 | | |
Abstract
The performance of a developed type of breakwater is presented. The breakwater consists of a suspended porous breakwater restrained by piles. The upper part is a vertical curtain of steel strips with consistence spaces in between. The piles are in two rows with spacing in the two directions. The spaces between the upper strips and between the piles allow for good transmission of water and sediment with a favorable dissipation of wave energy. So, breaking waves near the shore are alleviated and rip currents are eliminated. This type of breakwater is considered an excellent substitute for traditional breakwater in coastal areas with steep slopes of the sea bed and quite small surf zone. The Northwestern coast of Egypt is an ideal location for the application of this type of breakwater because of its sudden steep slope, wave breaking near the shore, strong rip currents and huge amount of sediment transport. Traditional shore protection structures along the Northwestern coast of Egypt have yielded quite reverse side effects. One paralleled breakwater at Sidi Kerair resort has been exploded and removed due to its complete failure in shore stabilization. A calibration has been performed to the computer program (FLOW-3D) using a set of laboratory results. A parametric study has been run in order to introduce the best configuration of the model. Real shore and sea data for several locations were applied and theoretical analysis has shown that the suspended breakwater leads to energy dissipation of incident wave energy and provides a quite safe surf zone for swimmers and human activity without any unfavorable changes of shoreline. The cost of the model is about 25% of the conventional breakwater. The breakwater can easily be adjusted after construction to meet any environmental changing conditions.
The structure of this thesis is as following:
• Chapter I includes introduction for the coastal protection, the objective of this study and thesis structure.
• Chapter 11 presents complete literature review about curtain wall breakwaters including its action, types, experimental studies and acting forces.
• Chapter III includes extensive overview of the Northwestern coast of Egypt and shows field surveying and collected data (winds, waves and currents) for two locations used as a case study.
• Chapter IV presents a numerical model and mathematical base for wave modeling.
• Chapter V shows analysis and discussion for transmission coefficient, wave heights after double curtain wall-pile breakwater.
• Chapter VI includes conclusion and future recommendations.