Abstract:We analyze the surveyed terrain and hydrodynamic data in Fujiangsha reach from 2010 to 2015,carry out the sediment transport experiment on fixed bed physical model,apply a three dimension tidal hydrodynamic and sediment transport model to study sediment transport of beach in Fujiangsha reach. The results show that the transport speed of cutting beach shows positive correlation with the driven factors,such as discharge,the height of beach and upstream face angle. The critical discharge which Jinjiang beach transport after eroded integrally or downstream part cutting off is 40,000 m3/s. The water area from Jinjiang beach to Fubei waterway is the main bed-load transport channel. The upstream discharge is the main hydrodynamic factor which determines the sediment transport pattern in Fujiangsha reach and river bed evolution. Fuzhong channel is the main path for bed-load transport at small discharge,and Fubei channel is the main path for bed-load transport channel at huge discharge. Severe siltation in Fubei channel will appear since much sediment transport into Fubei channel at condition of huge sustained discharge.