To study the water and sediment characteristics of the completed Sheyang Port waterway,on-site hydrological tests are conducted.According to the hydrological test results,the flow velocity outside the entrance of the Sheyang Port waterway is greater than that inside the entrance.At the inner channel of the double guide embankment,the rapid flow velocity is higher in the surface layer and lower in the bottom layer,while the rapid flow velocity in the water layer is higher than that in the 0.4H-0.8H range.The surface layer is the smallest,and the residual flow direction in the middle and upper layers of water is falling tide,while the middle and lower layers of water is rising tide.The sediment concentration outside the entrance of the waterway is significantly higher than inside.In the channel,during the low tide period,the average sediment concentration of the upper and middle water bodies of the falling tide is greater than that of the rising tide,while the middle and lower water bodies of the rising tide is greater.and during the high tide period,the average sediment concentration of the falling tide is mostly greater than that of the rising tide.The single width sediment transport rate at both high and low tide levels in the channel is greater than that at low tide,and the net sediment transport is from the channel entrance towards the harbor.The net sediment transport rate during the low tide period is greater than that during the high tide period.It takes about 4.5 to 6.5 hours for the bottom water flow to move from the entrance of the waterway to the harbor.Within a tidal cycle,the sediment from the outer sea can be transported from the entrance of the waterway to the harbor,providing a source of sediment for the sedimentation of the waterway and harbor.