NUMERICAL SIMULATION OF SEDIMENT TRANSPORT IN DYNAMIC FLOW CONDITIONS

The results of mathematical modelling of unsteady flow conditions coupled with specific sediment transport relations are presented here. Simultaneous solutions of the de Saint Venant equations with three different transport relations, namely the Engelund-Hansen equation, Graf equation, and an empirical equation are presented. The results obtained were compared with those from the Fluvial-12 program under the same input conditions and reasonable correlation was observed. The advantages of the coupled method for simultaneous solution of the equations comprise a higher degree of accuracy, the possibility of introduction of any desired transport equation into the model and the possibility of introducing any boundary conditions into the model alongside a complete unsteady flow modelling.