Abstract: Based on the study of installment floods and runoff distribution in flood season at Jiangya reservoir, the time period partition and control level were determined for the dynamic control of flood control level. Newoperational scheme for flood season was executed. During the real time reservoir regulation, the operational patterns of dynamic control of flood control level were adopted, such as the short- time extra- impounding and pre- discharge before flood, as well as impounding the flood tail. Therefore, the remarkable social and economic benefits were gained.