Abstract:

With largescale valley exploitation,the construction of a great number of reservoirs has exerted influence on the river ecosystem.How to mitigate the influence on river ecosystem by reservoir operation is a hot issue in the research of reservoir operation.Because the current reservoir operation emphasize the economic benefits but ignore ecology and environment,the ecology and environment,both in the reservoir and in the downstream,have been degraded.In the present paper, the concept and the tasks of reservoirs ecological operation from the view of natural resource sustainable development were discussed,and multiobjective ecological operation model of reservoir was built,which take the maximum benefit of the integrated system as the objective function,including the benefit of economics,societies and ecological environment.The model is well elaborated by taking various constraint conditions with the demand of comprehensive utilization,including irrigation,generation of electricity,transportation,tour,desalting discharge in estuary and emergency water use etc.The paper gives a method of feasible search discrete differential dynamic programming (FSDDDP method) for this model,which is valid to solve this type of model with complex constraint conditions.The case study showed that both the model and the method had reality and practicability.〖

Key words: reservoir ecological operation, sustainable development, feasible search discrete differential dynamic programming method(FSDDDP method)〖