Abstract: As the first-stage project of the south-to-north water transfer project has been built, the scheduling of Danjiangkou reservoir has become an important issue. The aim of this research is to provide basic support for the scheduling which could make a trade-off among multiple users in the Hanjiang river basin. In the light of storage, water supply, and power generation tasks, a scheduling model for Danjiangkou Reservoir was built through setting objective functions (minimum abandoned water flow and maximum power generation) and water supply dispatching scenarios (in the presence and in the absence of the south-to-north water transfer project). The solution space which meets the dispatching operation mode of Danjiangkou reservoir was constructed. Dynamic programming algorithm and natural incoming runoff series of Danjiangkou between 1956 and 2015 were used for the simulation. The influences of objective function and operation mode on the water regime and water balance in the downstream were analyzed. Results show that in the presence of the first stage of middle route south-to-north water transfer project, the discharge of Danjiangkou reservoir’s optimization scheduling is more than 27.2 billion m³, which could meet the water demands in the lower reach of Hanjiang River.

Key words: middle route of south-to-north water transfer project, Danjiangkou reservoir, operation scheme, water supply regulation, objective function