Study on Watershed Ecological Water Replenishment Coupling Hydrodynamic and Reservoir Operation

In order to develop an ecological operation strategy that combines cross-basin water transfer and reservoir ecological management, this study investigates the corresponding theoretical framework and methodological approach. A novel optimization model that couples hydrodynamic with reservoir dispatch for ecological water replenishment is proposed. Using the Yongding River ecological operation project as a case study, various scenarios of Yellow River water diversion are analyzed to assess the satisfaction of ecological water demands and associated costs in the downstream channel of the Guanting Reservoir. The results show that: 1) For ideal ecological flow process, suitable ecological flow process, and minimum ecological flow process in the downstream river channel of Guanting Reservoir, the minimum values are 8.67 m3/s, 4.46 m3/s, and 1.66 m3/s respectively, and the maximum values are 49.82 m3/s, 33.69 m3/s, and 8.37 m3/s respectively. 2) The coupling model is applied to the ecological water replenishment project of Yongding River and achieves satisfying effects. The ecological guarantee degree can be increased by 48.8