In order to reduce the adverse influence of The Three Gorges reservoir operation on ecological system, the problem of four major Chinese carps spawning was studied. Combined with the hydrological data, eco-hydrological events of spawning period were analyzed and calculated by using environment flow components calculation algorithm. With the statistical result of the ecological event parameters, the ecological flow process, which can meet the spawning demand, was proposed and improved by ecological operation. The results indicated that the four major Chinese carps spawning process is composed of low flow event and high-flow pulse event, the proposed flow process can meet its spawning demand of flood pulse. The ecological operation is beneficial to four major Chinese carps spawning and ecological system restoration.
