2013 Volume 69 Issue 2 Pages I_79-I_86
A depth averaged sediment transport model has been developed to simulate bed level changes on alluvial beds. MAC on collocated grid system for shallow water equations (MACS) algorithm was used to track the hydrodynamic module of the developed model. The sediment transport module was describing the bed deformation either by the equilibrium or the non-equilibrium approaches for the suspended- and bed-load sediment transport. The developed model was verified against different scour problems and its validity was examined. A sensitivity analysis was conducted to estimate the in uence of the non-equilibrium adaptation parameters on the numerical results. Results revealed that although the non-equilibrium model requires more computational effort and extra 10% computational time than the equilibrium one, it gives enhanced results than those that are predicted by the equilibrium approach. However, refinement of the hydrodynamic model is required for better results.
