Samir Abohadima

Hydrodynamic models represent the core of any simulation for water quality, siltation, and morphology studies. In this study a finite element model was setup for the Red Sea to predict the tidal currents and tidal water level variations. The boundary for the model is located at the Straits of Bab-al-Mandeb. The model was simulated using two dimensional depth averaged model with an element size varying from 15 km to less than 1 km. The model was shown to provide good results for the water level variations at many stations in the Red Sea.

Many resorts were constructed along the northern coast of Egypt for recreational purposes. High waves often occur in the used-zone leading to uncomfortable conditions. Moreover, the resulting longshore current with high speeds due to wave breaking leads to undesirable current flow. Rip currents generated in the used-zone can also be a hazard to swimmers This study aims at testing the possibility of using detached low crested submerged breakwaters to provide suitable swimming conditions along the northern coast
of Egypt. Detached low crested submerged breakwaters are considered as they do not obstruct the sea view and have lower negative impacts on the environment. This study attempts to provide a numerical examination for several configurations using different breakwater and the gap lengths. Three numerical models were used; refraction diffraction model for waves, hydrodynamic model for current circulation and one line model for shoreline movement. The best breakwater configuration to provide safe swimming area is recommended with an assessment of the negative impact on the shoreline stability. This study will be useful for the recreational resorts along the northern coast of Egypt.