Regarding the changes in the navigation conditions of the Xiongcheng (Xiongjiazhou-Chenglingji) river section of middle reaches of the Yangtze River over the next decade following the implementation of the waterway regulation project,this study adopts the research method of movable-bed model experiments to establish a physical model of the Xiongcheng river section.By reproducing the natural water and sediment conditions of the river section from February 2022 to March 2023,the rationality of the model design,sediment selection,and various scales is verified.Model tests are conducted in typical and series years to analyze changes in riverbed scour and deposition,as well as the evolution of shoal-channel patterns in the Xiongcheng river section after the implementation of the waterway regulation project.The results show that after implementation of the remediation plan,the riverbed of the river section has been eroded,the pattern of the beach and channel has not changed much,and the navigation conditions have significantly improved,which can achieve the remediation goals.Local erosion pits have appeared at the head of the stone throwing prism in the straight transition section on the west side of Baxingzhou,and there has been a certain degree of siltation in some areas of the Qigongling bend section at the end of each year,with the largest at the end of 4 years,which requires maintenance and dredging to ensure smooth flow.It is recommended to strengthen the observation of the Qigongling and Qixingzhou bends after the implementation of the project.If there are adverse changes or navigation problems,timely maintenance measures should be taken to ensure smooth navigation.