Optimized flood control for the Three Gorges Reservoir considering evolving flood propagation trends in the Jingjiang Reach of the Yangtze River

The main objective for the Three Gorges Reservoir is to help control floods and protect Jingjiang Chenglingji regions in middle reach of Yangtze River. Hydrological measurements have demonstrated that character flood propagation Reach has changed significantly since became operational, meaning management must be modified accordingly. To explore effective management, a hydraulic model was developed simulate potential causes impacts. For natural with gradually varying discharge propagated as diffusive wave, celerity downside dam fasted due change dominant property wave. event controlled by reservoir, wave more quickly surge rapidly discharge. rating curve flooding processes associated versus at particular cross-section, which flow capacity river channel. Observed events 2016 2017 were also simulated using different schemes, trends along lower analyzed. Lastly, from these simulations, we provide suggestions on how optimize operation damage Jiangjiang areas effectively.