2021 Volume 77 Issue 2 Pages I_685-I_690
This study examines sediment run-off and particle-size segregation for sediment replenishment containing fine particle through laboratory experiment and 3D sediment transport simulation. The simulation is based on a Lagrangian method and the probabilistic Exner equation (PEE) for non-uniform sediment behaving as bed load and suspended load. The simulation newly introduced the average Step-length model which considers the difference of particle size between bed load and stationary bed. Experiment and simulation agreed fairly well. In addition, the average setp-length model revealed a well known phenomenon that existence of finer bed particle can increase the bed load rate of a coarser particle. The output of the present study provides a insight into sediment run-off and particle-size segregation fron the Lagrangian view. In addition, the present study indicates an important research subject for Lagrangian non-equilibrium sediment transport simulation to be resolved in the future.
PROCEEDINGS OF HYDRAULIC ENGINEERING
