Reservoir flood control operation considering spillway gate scheduling
[Objective]Reservoir flood control operation plays an important role in flood control work,and how to control the spillway gates is the key to the implementation of reservoir flood control operation scheme.[Methods]This paper establishes an optimization model for optimal reservoir flood control operation considering spillway gate scheduling to obtain precise scheduling.A novel two-layer nested algorithm is then proposed to solve the model.In the inner layer,the spillway gate combination table,which includes all feasible spillway gate combinations,is established based on the water discharge curves and operation rules of individual spillway gates.In the outer layer,the forebay water level and total water discharge of the reservoir are optimized using the progressive optimality algorithm(POA),and each spillway gate's operation status is determined by querying the spillway gate combination table.[Results]The validity of the model and approach are verified by taking the flood control operation of the Manwan Reservoir,located on the Lancang River in southwest China,as an example.The optimization result indicate that the proposed two-layer nested approach is computationally efficient.For the flood events with return periods of 100 years and 10 years,the flood peaks are reduced from 12 010 m3/s to 10 611 m3/s and from 5 003 m3/s to 3 351 m3/s,representing decreases of 11.6％and 33.0％,respectively.The amplitude of flood fluctuation was reduced by 94.5％and 8.8％respectively,which greatly relieved the pressure on downstream flood control.Moreover,compared with the conventional model without considering spillway gate scheduling,the proposed model can produce more realistic and executable flood control operation scheduling.[Conclusion]The presented method can realize the transformation of reservoir flood control operation to the operation control of flood discharge facilities,and has certain significance for enhancing the operability of flood control operation result and improving the level of reservoir flood control operation management.
flood control operationspillway gatetwo-layer nested approachspillway gate combination tableinfluence factor
万方数据
维普
