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A movable-bed physical model is presented to investigate characteristics of hydrodynamic and sediment transport (ST) in a planned excavating channel downstream the Fuhe River (FHR) and the Qinglan Lake (QLL), Jiangxi Province, China. The model is validated by the observed water level and velocity data during the low water period in May 13 and high water period in June 21 2014, respectively, which shows well agreements between simulated and observed data. With repeating 6-years cycle of the runoff discharge and suspended sediment concentration condition from the Lijiadu hydrological station downstream the FHR during 2006 and 2008∼2012, experiments are conducted to predict bed evolution process in the excavated channel and QLL after the implement. The hydrodynamic results indicate that the cross-section averaged velocity generally increases both in the QLL and upstream of the excavated channel during a 20-year return period flood. The ST results show that erosion develops mainly in the left side of the channel and deposition occurs slightly upstream of the QLL after 30 years. Some deposition becomes visible in the center of the QLL after 90 years, and a relatively stable balance between deposition and erosion is observed in the whole QLL after 150 years.

Study on hydrodynamic and sediment transport characteristics considering implement of the Fuhe River Diversion Project in China