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The dredging operations of trailing suction hopper dredgers discharge large quantities of fine sediment into the water and can cause a substantial increase in suspended sediment concentration, resulting in the formation of visible surface plumes. This paper describes the development of a new surface plume model for the sediment transport modelling of marine dredging. The model is based on the analytical solutions of the horizontal advection and dispersion-diffusion equation and is suitable for unsteady flows in the marine environment. The newly developed model has been applied to a proposed marine dredging feasibility study in Hong Kong to demonstrate the possible model applications.
The dredging operations of trailing suction hopper dredgers discharge large quantities of fine sediment into the water and can cause a substantial increase in suspended sediment concentration, resulting in the formation of visible surface plumes. This paper describes the development of a new surface plume model for the sediment transport modeling of marine dredging. The model is based on the analytical solutions of the horizontal advection and dispersion-diffusion equation and is suitable for unsteady flows in the marine environment. The newly developed model has been applied to a proposed marine dredging feasibility study in Hong Kong to demonstrate the possible model applications.