Many tributaries are distributed along the Pinglu Canal,and the aggradation of the sediment transported from them in the canal affects the canal construction and navigation safety.Xinpingshui is an important target in tributary-sediment-control efforts of the Pinglu Canal.For clarifying the sediment transport pattern of Xinpingshui,the flow-sediment transport characteristics in this tributary for different hydrological regimes are investigated on the basis of in-situ monitoring and theoretical analysis.Measured data are applied to propose an empirical prediction method for the sediment transport rate of Xinpingshui flow.The results show that every cross-section of Xinpingshui exhibits a wide and shallow U-shape,with sediment particles of riverbed displaying a pattern of coarsening followed by fining along the river.Without rainfall,the sediment transport capacity in each reach of Xinpingshui is greater than the measured sediment transport rate in both dry and flood seasons,indicating the flow may scour the riverbed and transport sediment to the canal.During the flood season,rainfall can significantly increase the flow sediment content near the confluence of Xinpingshui,resulting in the measured sediment transport rate exceeds the sediment transport capacity,which may cause riverbed aggradation here.The sediment transport rate of Xinpingshui flow is positively correlated with discharge.