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2001年6月10～12日,欧阳海水库库区普降大到暴雨,局部特大暴雨,3d 内流域平均总降雨量157.8mm,流域平均最大1d 降雨量95.7mm。由于降雨历时短、强度大,致使流域发生了100a 一遇的特大洪水,最大入库洪峰流量4600m~3/s,比1915年历史调查洪水的洪峰4060m~3/s 要大13%。由于洪水预报及时、准确,水库调度决策科学合理,防洪抢险措施得力有效,从而成功地调度好了这场历史上的最大洪水,保证了大坝安全度汛,使最高调洪库水位(坝前水位)仅为129.63m(比正常高水位低0.37m),最大下泄流量2840m~3/s,削减洪峰流量1760m~3/s,削峰38%,大大地减轻了下游沿河两岸的洪灾损失,充分发挥了水利工程在大洪水调度中的重要作用。
From June 10 to June 12, 2001, the reservoir area of Ouyanghai reservoir dropped from heavy rain to heavy rainstorm. The average total rainfall in the basin was 157.8mm in three days and the average rainfall in the basin was 95.7mm in the maximum one day. Due to the short rainfall and strong intensity, rainfall of 100 years occurred in the basin. The maximum flood peak flow was 4600m ~ 3 / s, which was 13% larger than the flood peak of 4060m ~ 3 / s in 1915. Due to the timely and accurate flood forecasting, scientific and reasonable decision-making of reservoir management and effective flood-control and rescue measures, the largest flood in history was successfully dispatched, the dam safety was ensured and the water level at the highest reservoir Water level) is only 129.63m (0.37m lower than the normal high water level), the maximum discharge rate is 2840m 3 / s, the peak discharge is reduced to 1760m 3 / s, and the peak cutting is 38%. This greatly reduces flood losses along the banks of the river , Give full play to the important role of water conservancy projects in flood control.