关键词: 金沙江下游-三峡梯级水库;水库联合调度;防洪减灾;综合效益;长江流域;

Abstract: The Jinsha River-Three Gorges cascade reservoirs play an important role in the ‘Great Protection of the Yangtze River’.Meanwhile，they are also a group of important supporting power sources for the national energy strategy.These reservoirs have close hydraulic and electrical relations，which have huge potential for joint dispatching.However，their joint dispatching meets the development theme of the times，and its also a major challenge in the field of water resources efficient utilization.To maximize comprehensive benefits of the cascade reservoirs，a technical support system for cascade reservoirs joint dispatching is introduced in detail，which is composed of multi-source water and rainfall station fusion technology，meteorological forecast technology，basin hydrological forecast technology and cascade reservoir joint optimal operation technology.Through application of these technologies，the coordinated efforts are made in many aspects such as flood control，unimpeded shipping，water resources utilization，and environmental protection，giving full play to the comprehensive benefits of cascade reservoirs，and achieving remarkable results in the scheduling practice over the years.From 2003 to 2021，the Jinsha River-Three Gorges cascade reservoirs had held 228.002 billion cubic meters of floodwater，which ensured the safety of flood control in the middle and lower reaches of the Yangtze River.The accumulated water supplement was 330.884 billion cubic meters.Meanwhile，the average depth of the downstream channel was increased by 0.81 meter，providing a golden channel for the development of the ‘Yangtze River Economic Belt’.Whats more，a total of 35 ecological dispatching tests had been carried out to support the protection of the Yangtze River，and 2 932 billion kW·h of clean energy had been delivered，resulting in emission reduction of more than 2.439 billion tons of carbon dioxide，which contributed green kinetic energy to the realization of the carbon peaking and carbon neutrality goals.

Key words: Jinsha River-Three Gorges cascade reservoirs；reservoirs joint dispatch；flood prevention and disaster reduction；comprehensive benefits；Changjiang River Basin