PIANC Smart Rivers 2022
Reviewing Presentation documents
Topic:
Inland Navigation Structure
Logistics
River System Management
Smart Shipping
Special Sessions
Waterway Infrastructure
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Abstract :
*(250~1000 words)
Taipingkou channel is the first sandy shoal channel in the lower reaches of the Three Gorges Reservoir. The change of river boundary is basically stable under human control, but the change of beach trough in the channel is complex, which has adverse effects on navigation. In particular, the shrinkage of Sanbatan is harmful to the design of navigation bridge hole of Jingzhou Yangtze River Bridge in dry season. By analyzing the hydrological and sediment characteristics of Taipingkou waterway before and after the impoundment of the Three Gorges Reservoir, and studying the changes of river regime, erosion and deposition adjustment, beach evolution and diversion ratio, the influence of the impoundment of the Three Gorges Reservoir on the riverbed evolution of Taipingkou waterway is discussed. The results show that the Three Gorges Reservoir has changed the inflow and sediment process of Taipingkou Waterway, resulting in the frankness of annual runoff process and the reduction of sediment concentration. Under the condition of new water and sediment, the tidal flats of Taipingkou waterway show a general erosion trend. The branch with large drawdown and good inflow conditions is easier to develop, and the peak regulation greatly limits the back siltation of the convex bank side beach in the recession period. It is believed that the root cause of the current navigation obstruction of Taipingkou waterway is that the navigation bridge hole setting of Jingzhou Yangtze River Bridge cannot adapt to the trend of river evolution, and dredging is an effective measure to ensure the smooth flow of the waterway.
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