The effect of wave period on sedimentation pattern in inlets using numerical modeling

Inlets play an important role in controlling sediment movement and distribution in coastal areas. Therefore, recognizing effective factors in the hydro-dynamicity of inlets known as transmission process and determining the geometry and formation of inlets is of paramount importance. Short waves are among the major factors shaping an inlet. The breaking of wave in shallow water in the mouth of inlets causes the formation of long shore current and sand transport in this area. The purpose of this study was to find out how period wave could interactively affect the sediment. To this end, a coastal basin that is connected to the open sea through a mouth is simulated in mike 21 software. For this simulation, a 10*50 meter un-structured triangular flexible mesh in a finite difference model at one second intervals was used; short waves were sent to the mouth of the inlet at varying periods. Simulation results show that the flow and sedimentation patterns interactively don’t change the morphology of the inlet. While with increasing wave period, amount of flow velocity and sedimentation rates change low.