مهندسی دریا
Sina Gharavi; Seyed Mostafa Siadatmousavi; Ali Khoshk holgh
Abstract
Sedimentation and erosion are among the most significant issues that pose serious challenges in coastal areas. The consequences of these phenomena include reduced lifespan of ports, continuous dredging, and high costs. When ports experience sedimentation, engineering solutions are required. Predicting ...
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Sedimentation and erosion are among the most significant issues that pose serious challenges in coastal areas. The consequences of these phenomena include reduced lifespan of ports, continuous dredging, and high costs. When ports experience sedimentation, engineering solutions are required. Predicting the rate and pattern of sediment deposition in the access channel and the basin of ports enables better cost management. The objective of this study is to numerically model the hydrodynamic and morphological effects using the open-source numerical model TELEMAC in the Strait of Khuran and Shahid Rajaei Port, located in the Persian Gulf. For this purpose, water surface elevations at open boundaries were provided to the model, obtained from a calibrated MIKE21 model. The hydrodynamic model was executed, and the output included velocity and water surface elevation. Additionally, the sediment transport model GAIA was coupled with the hydrodynamic model and executed. The sediment model output includes bed level changes and suspended sediment concentrations. Finally, the simulated model was validated using measurement data, confirming that the dominant flow is tidal, parallel to the coast, and reaches a maximum velocity of 2 meters per second. The water surface elevation modeled by TELEMAC indicates that localized maximum water levels reach up to 4 meters. Wind speeds rarely reach 5 meters per second in the Khuran channel, and therefore, their influence on the currents is minimal. The results from the sediment model demonstrate that the intensity of sediment deposition in the port area and the access channel is higher in the central and eastern parts of the Strait of Khuran, as well as in the western area of Shahid Rajaei Port.
علوم غیرزیستی دریا
Parastoo Akbari; Masoud Sadrinasab; Vahid Chegini; Seyed Mostafa Siadat Mousavi
Abstract
Tide is one of the most regular changes of seas and ocean levels which are offering particular importance due to the influence on the flow pattern. According to engineering and environmental needs in industrial economic zone of Persian Gulf, Strait of Hormuz and Gulf of Oman, knowing the tidal characteristics ...
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Tide is one of the most regular changes of seas and ocean levels which are offering particular importance due to the influence on the flow pattern. According to engineering and environmental needs in industrial economic zone of Persian Gulf, Strait of Hormuz and Gulf of Oman, knowing the tidal characteristics of these areas is important. Therefore FVCOM (ocean model) was used to stimulate the tidal amplitude in an area comprising Persian Gulf, Strait of Hormuz, Gulf of Oman and Arabian Sea. Finite volume method is used in this model to discretize the hydrodynamic equations on triangular mesh. Uniform mesh is used with a resolution of 5 km in the model.The constant values of eight diurnal and semidiurnal tidal components are prescribed along the open boundary. In order to validate the model results, after applying harmonic analysis on the model outputs in desired stations, the achieved amplitude of this analysis compared with results which are obtained from the analysis on the available measurement data in these stations. According to the measurement and model results in these stations, meanwhile identifying the four main tidal components, the amplitude pattern of these components was determined in the whole domain. Also, by using amplitude of main components and estimating of F factor, the type of tide was predicted in the study area. Moreover, studying the maximum amounts of tidal velocity in the study area shows that the amount of this velocity in the Gulf of Oman and Arabian Sea is less than 0.1 m/s.