丹江口枢纽(初期工程)主体工程于1973年全面建成。自1968年第一台机组投入运行以来,由于基本上贯彻了规划调度原则及按综合利用调度图运行,在防洪、兴利各方面发挥了较大作用。自1968年至1981年投入运行的13年中,对上游发生的31次洪水(指洪峰流量大于10,000秒立米)经水库拦蓄或基本拦蓄的就有25次,极大地减轻了汉江中下游洪水灾害,为 Danjiangkou hub (initial project) the main project was completed in 1973. Since the first unit was put into operation in 1968, due to the principle of planning and scheduling and the operation in accordance with the schedule of comprehensive utilization, basically it has played a significant role in flood control and development. In the 13 years since 1968-1981, there have been 25 floods of 31 floods (referring to flood peak flow of more than 10,000 seconds) upstream of the Han River, resulting in a total reduction of 25 floods in the middle and lower reaches of the Han River ,for