1. Fluid Mud Layer and Its Effects on the Hydrodynamics of Benthic Boundary Layers Xiao Hua Wang School of Geography and Oceanography University of New South Wales @Australian Defence Force Academy Canberra, Australia

2. 1. Introduction 2. Model description 2.1. Hydrodynamic model 2.2. Sediment transport model 3.Experiment setup 4.Model results 4.1.Benchmark experiment 4.2.Resuspension hysteresis—the nepheloid layer 4.2.1.Sensitivity to Mellor-Yamada turbulent closure assumptions 4.2.2. Effects of flocculation 4.2.3. Effects of freshwater runoffs 4.3.Hyperpicnal plume 4.4.Bottom drag coefficient 4.5.Model sensitivity to vertical resolution 5. Summary and conclusions

4. E 0 =10 -4 kg m -2 s -1, w s =-10 -4 m s -1,  c =0.02 N m -2