Abstract
Numerical model for gravel transport was developed. The model employs relation for hiding and bed-load transport of mixtures of Ashida and Michiue (1972) and Wilcock and Croew (2003) and links grain size distributions in the bed load, surface layer and subsurface with the gravel transfer function. The model is also based on finite volume method using HLLC (Harten, Lax and van Leer(1983)) numerical flux. The model was applied to experimental data of a bed degradation and aggradation with armouring and downstream fining. It shows that the model has ability to reproduce the process of bed degradation and aggradation with aromouring and downstream fining, but the more improvement is needed to predict reasonable accuracy.
