Influence of Typhoon Induced Siltation on Waterway Transportation in Navigation Channel of Guan River Estuary

Sudden siltation of navigation channels and the resulting impact on navigation safety as well as channel dredging are important issues concerning waterway transportation management departments. For the Guan River Estuary, where typhoons frequently occur, reasonable simulation of typhoon-induced siltation is of great significance. Using curvilinear grids, a triply-nested two-dimensional model which combines typhoon models, hydrodynamic models, wave models, and sediment transport models was adopted in this study. After a series of successful validations, these models were applied to provide a qualitative impression of sudden siltation on this channel during typhoon Damrey. Simulated results show that typhoon Damrey can result in obvious siltation along the channel. It was also found that siltation is unevenly distributed in time and space. By running the nested models, the simulated results can be employed in management of waterway safety and further implementation about channel dredging in this estuary.