Coastal activities during the past five decades have resulted in considerable shoreline change along the northern coast of Sinai Peninsula. In the east of El Arish Harbor, the shoreline is continuously retreating. Previous activities to mitigate the erosion have not succeeded. For example, the groin field in the east of the El Arish Harbor has transferred the problem to the neighboring beaches farther downcoast. The shoreline change at El Arish Harbor was modeled using the coastal evolution model LITLINE. Having understood the coastal processes driving the shoreline change at this site, appropriate remedial measures were proposed to mitigate the problem.

During the last two decades, new container ship generations had come into service, as a result of the huge growth of container trade. New container ships with larger dimensions may lead to the need to develop many of container terminals by either just deepening in front of quay walls or by deepening and replacing existing quay cranes with ones of higher capacities. In Port Said area there are several ports that need to keep pace with the tremendous progress in ship sizes. One of these ports is the Port Said East Port container terminal located on the Mediterranean Sea to the north of Egypt. The diaphragm wall which services as a berthing structure in this port is one of the deepest diaphragm wall structures built in soft clay, 62.5m deep below lowest astronomical tide (LAT). The existing water depth in the front of the quay wall is 18 m. This paper describes a finite element approach for analyzing the behavior of the quay wall under development scenarios using static calculation only. The finite element programs PLAXIS 2D Version 8.2 and PLAXIS 3D Version 1.6 have been used to analyze the performance of the structural elements, soil and the overall stability under deepening and the increase of crane wheel loads to accommodate the expected future ship sizes. The results showed that the diaphragm quay wall can resist safely 4 m deepening in front of the quay wall considering the existing crane loads. While, the results showed that width of cracks limitation will restrict increasing quay cranes loads.

The increasing desire to live at coastal areas has a deep effect in large number of marine developments and man-made island all over the world. Hence, the artificial island at East Port said, Egypt was the chosen research point as a future project. As the artificial island will be designed for tourist purpose, the flushing study is very important part to ensure the water quality and check the preliminary layout of the project to circulate and renewing the water body inside island with adequate time. This paper describes how integration of engineering and environmental aspects into the planning with extensive use of numerical hydrodynamics models by using MIKE21. This paper show the result for most important cases to judge the suitability of flushing time and also it proved that wind has a deep effect to improve the results for the residence time which may reach more than 50%.

The flushing study is very important part to ensure the water quality and check the preliminary layout of the project to circulate and renewing the water body with adequate time. This research describes how to integrate engineering and environmental aspects into the planning with extensive use of numerical Hydrodynamics (HD) models by using MIKE 21 software. A parametric study of different parameters which affect the residence time hence the water quality in lagoons, marinas, harbors and coastal basins was carried out to establish guidelines for improvement methods of water flushing in marinas and lagoons. Finite element conceptual models are applied to simulate and investigate the most important factors dominate the resident time and water exchange rate such as tidal inlets characteristics (number-location-width), the shape of water body, basin dimensions and tidal variations. Data of water level variations used in simulations are collected based on the conditions of fishery ports and lagoons along Egyptian coastal line in both Mediterranean and Red sea. In this study, a wide range of numerical simulation (more than 50 HD models) with different geometry boundary conditions were conducted. The results showed that the square shape of water surface area is more efficient in water circulation improvement for small water body areas. While, as the area required increased, the rectangular water surface efficiency in water circulation improvement become closer to the square shape with same surface area. The inlet width and its location should be determined wisely to achieve the optimization of its function. Finally, the results showed that as the values of the sea level variations increased the maximum flood current velocities at the entrance increased. In addition, the flow spreading efficiency increased with the higher water level values over the whole water surface regardless of the water depth.

Using the press-replace technique, a recently developed finite element method depending on the criteria of the small deformation analysis SDA, to investigate the soil-foundation interaction of the Jack-Up rig with Spudcan during its proceeding to achieve stability installation in Multi-Layered soil. The analysis has been implemented and compared with previously published cases, which has been done experimentally and by using large deformation finite element analysis. The Press-Replace technique PRT is mainly has been developed able to capture the Spudcan proceeding through the multi-layered soil specifically in cases of penetrating through soft soils by simulating the possible squeezing accompanied by the back-flow phenomenon, which happens for the soft soil during the installation. The considered analysis criteria have been explicated. The results provided an effective expectation of the soil-structure interaction validated by the previous experimental and numerical results. Depending on the detailed analysis steps provided, engineers and researchers can use it to make the needed analysis for similar case studies. The small deformation analysis SDA has been operated on six cases of multi-layered soils and compared to the previous experimental and numerical results. The variety of investigated cases was depending on the type of upper layered, either it was a soft to moderate clay layer or a sand layer. The two main criteria have been considered in the current analysis, which is the backflow of clay and the back-fill of sand. As the analysis theory depends mainly on the geometry update, the simulation steps of these two criteria have been provided in detail. That control has been applied, by observing the soil movement behavior of the previous experimental outcomes. Four cases with upper clay soil and other two cases with upper sand layers have been investigated and compared to previous experimental and numerical results. By controlling these two states of the upper soil layer, it can be obtained the different simulation steps in the analysis in the condition of the existing upper layer is sand or clay. The analysis provided shows a good comparison of stability depth to the previous results. Furthermore, it gives a very close evaluation behavior to the previous experimental results. This approach numerical method provides a tool for the engineers to use the Press-Replace technique PRT, which is a smooth and fast numerical technique compared to the other numerical methods, to investigate and obtain the Spudcan penetration through similar cases of multi-layered soil.