Application Of Numerical Model Of Suspended Sediment Transport And Fluid Mud Process In Quanzhou Harbor

For typical muddy coast,serious cohesive sediment transport,channel deposition and even fluid mud in the channel may be caused by wind waves during extreme weather such as typhoon.The sediment transport and fluid mud formation in Jingshang Harbor area of Quanzhou Harbor during typhoon is simulated by an integrated model including atmospheric model WRF,wave model SWAN,hydrodynamic model FVCOM,and the model of sediment transport and fluid mud motion with consolidation.The main research contents and results are as follows.A new erosion formulation instead of the original linear erosion formulation is used in sediment transport model of FVCOM and is verified through the erosion experiment of fluid mud.The simulation results are in good agreement with the measured values,which indicates that the formula can be used in engineering applications.The sediment transport in Lianyungang Harbor area and fluid mud formation in the navigation channel during Typhoon Weipa in 2007 and Typhoon Damrey in 2012 is simulated through the integrated model.The simulation results are in good agreement with the measured values,which indicates that the model is reasonable.In addition,the variation mechanism of fluid mud thinckness after typhoon process is disclosed.The sediment transport and siltation in Jingshang Harbor area of Quanzhou Harbor for the cases of pure tidal flow in 2016 and strong wind processes in 2018 are simulated by the integrated model.The parameters for flow,wave and sediment simulation are calibrated.The sediment transport and fluid mud formation in Jingshang Harbor area of Quanzhou Harbor during Typhoon Mangkhut in 2018 is simulated by the integrated model with the calibrated parameters,and the effects of Typhoon on the basin siltation is evaluated.