Simulation of sand and mud transport processes in curents and waves by time-dependent 2DV model  

作　　者：Leo van Rijn Karel Meijer Kris Dumont Jan Fordeyn 

机构地区：[1]LVRS-Consultancy,Domineeswal 6,Blokzijl 8356DS,the Netherlands [2]Meijer-TWD-Consultancy,Dwarsweg 13,Eesveen 8347WG,the Netherlands [3]JandeNul-Group,Tragel 60,Aalst 9808,Belgium

出　　处：《International Journal of Sediment Research》2025年第1期1-14,共14页国际泥沙研究(英文版)

摘　　要：This paper presents a time-dependent,two-dimensional vertical model for the simulation of sand and mud concentrations,transport and bed level changes in tidal conditions with or without surface waves.The model solves the advection-diffusion equation for suspended sediment.The horizontal velocities and the sediment mixing coefficients are modelled as function of x,z,and t.The settling velocity is constant or modelled as function of the sediment concentration.The sediment mixing coefficient over the water depth is described by flexible expressions based on current and wave parameters which can be modified easily in the input file.To represent mud flocculation and hindered settling processes,the settling velocity can be set as constant or concentration-dependent(input).The bed boundary condition is modelled as a bed concentration as function of the bed-shear stress.The model is valid for low and high sand and mud concentrations including fluid mud concentrations.The numerical SUSTIM2V-model is herein used to simulate sand and mud transport as measured in tidal waters.The model is also successfully used for simulation of high mud concentrations in the near-bed region as measured in the mouth of the Amazon River.The model has also been used to simulate scour along an offshore caisson-type foundation structure.

关 键 词：Tidal sand-mud transport Fluidmud transport Channel dredging predictions Erosion predictions 

分 类 号：P73[天文地球—海洋科学]