ANALYSIS AND NUMERICAL SIMULATION OF SEDIMENT DEPOSITION IN SHIP CHANNEL AT TOYO PORT

Abstract

 At Toyo Port, silt accumulates in the ship channel after disturbances such as typhoons.In this study, bathymetric survey results, wave and river flow data were analyzed, and the sedimentation process was confirmed by numerical simulation. Data analysis estimated changes in sediment volume from bathymetric measurements since 2018 and showed that there is a high correlation with wave and river discharge. Therefore, it was inferred that the sediment from the river during floods was transported toward the channel while being sedimented and resuspended. In the numerical simulation, the sedimentation in the ship channel caused by Typhoon 1824 was reproduced by siltaion model adopted sigma coordinates. In particular, it was found that wave current generated at the river mouth enhances the sediment transport to the ship channel.