3D Numerical Simulation Of Sediment Transport Around Huanghua Port

Huanghua Port was built on silt-muddy coast. Since it was constructed, thesudden siltation occurred many times in Huanghua Port. So it is important for the portdevelopment to study the sediment transport around Huanghua Port. A 3D numericalmodel for multi-fraction sediment transport under the combined action of wind, waveand current was developed in the present thesis and was applied to study the practicalproblems of the Huanghua Port, such as the armoring of the beach and the channelsiltation problem. The main results are summarized as follows:Firstly, the SWAN wind wave model and the hydrodynamic and sedimenttransport model of EFDC were introduced. Then combining wind wave, current andthe sediment model together, the sediment transport model for multi-fraction sedimenttransport under the combined action of wind, wave and current was developed. Themodel was applied to simulate the hydrodynamics and sediment transport aroundHuanghua Port using nested simulation. The model was verified through the measureddata in site.Secondly, the model was applied to simulate the beach armoring phenomenonaround Huanghua Port. It is found that under the sixth and eighth grade wind loading,the sizes of sediment particles get coarser in the nearshore bed. The grain size becamefiner gradually from south to north and west to east. The armoring phenomenon of theparticles is more obvious with stronger wind.Finally, the channel siltation and the sediment composition deposited in thechannel before and after the regulation project was simulated using the model. It isshown that compared to the status before the regulation project, the siltation volumeof the channel decreased and the fine grain in sedimentation material increased. It isconcluded that the regulation project exerts an obvious effect of reducing siltation.