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1987年当长江第三次洪峰到达葛州坝枢纽前夕,7月23日上午10时30分入库流量5.9万立方米/秒,下泄流量5.82万立方米/秒,坝上水位66.17米,宜昌水位53.63米,此时三江六孔冲砂闸开启泄洪。自葛州坝1981年截流以来,去年三江第一次泄洪流量达到9000立方米/秒,咆哮江水由冲沙闸夺孔而出,经3900米的三江下游航道到达三江口门
In 1987, when the third flood peak of the Yangtze River reached Gezhouba Dam on the eve of the junction, the morning of July 23 at 10:30 am, the storage flow was 59,000 cubic meters per second, discharging 58,200 cubic meters per second and the dam water level was 66.17 meters. Yichang The water level is 53.63 meters, at this time Sanjiang Liu Kong red sand gate open flood discharge. Since the closure of the Gezhouba Dam in 1981, the discharge flow of the first Sanjiang River reached 9000 cubic meters / second last year. The roaring river was punched out of the red sand gate and reached the Sanjiangkou gate via the 3,900-meter lower Sanjiang River waterway