With a numerical model for unsteady sediment transport during flood routing, work is done to hindcast the flood routing through the lower Yellow River during the flood season in 1997、the real time flood routing during the flood season in 1998,the process of flow and sediment transport during the flow and sediment regulation in 2002 and a phenomenon of the abnormal flood peak increment during the process of 04.8” flood. Comparison of the calculated and measured values shows the model can precisely simulate the processes of flow and sediment transport, flow level variation, erosion and deposition. In addition, the model can predict the abnormal phenomena in the course of flood routing. The precision of calculated results is found good enough to satisfy the need for flood control in flood seasons.
