Majid Safehian - Assistant Professor, Department of Civil Engineering, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran
Shapour Tahouni - Assistant Professor, Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran
Maryam Nikkhah - Ports and Marine Structures Dept. in Tadbir Sahel Pars Consultant, Tehran, Iran

Sedimentation is an important and common problem in management of ports. The aim of this study was to set up thehydrodynamic modeling of the area to estimate the sedimentation rate using MIKE21. Therefore, in this paper ananalytical model is developed for studying sedimentation in Astara port. The model is run in MIKE 21 Flow ModelFM. The wind and wave sources which have been used in this study are ECMWF 2D and ISWM project,respectively. Also, for determination the rate of sediment transport are used Kamphuis method and Litpack model.Simulation results have shown good agreements compared with field measurements and real observations. Thenumerical model results are obtained both before and after extension of the breakwaters. Before extendedbreakwaters, a large amount of sediments entered to the channel and net littoral drift is directed from north to south.Then, four variants for reduction of sedimentation are proposed and finally the best solution is determined. Inproposed solution the problem of sedimentation in entrance of Astara port has been removed.

Coastal management, Sedimentation, Numerical modelling, Breakwater