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1998年7月16日13时,黄河下游花园口站发生4700m~3/s 流量的洪峰。洪水期间,河南省封丘县古城控导工程16号坝造成断坝,过水口门宽26m(距坝根34～60m),最大过水深4m。在没有出现横河、斜河的情况下发生如此重大险情,实属罕见。1 工程概况古城控导工程始建于1930年,共修建了16道坝、20座垛、8段护岸,工程长度达3101m。其中16号坝于1995年修建,属旱地施工的块石结构,靠溜后多次抢险,坝下有一生产堤破除口门。近3年机淤固堤在15～16号坝
At 1300 hours on July 16, 1998, a peak of 4700m ~ 3 / s flow occurred at Huayuankou Station in the lower Yellow River. During the flood period, No. 16 dam of Gucheng Control Project in Fengqiu County of Henan Province caused a dam break, with a gate width of 26m (34 ~ 60m away from the dam root) and a maximum water depth of 4m. It is rare for such a major danger to occur without the appearance of Yokogawa and Hilly River. 1 Project Overview The project of controlling the ancient city was founded in 1930, with a total of 16 dams, 20 stacks and 8 bank revetments, with a total length of 3101m. Among them, Dam No. 16 was constructed in 1995 and is a rock and stone structure under dry land construction. It has been relying on numerous rescue measures after it was slipped and a dyke breakage gate was built under the dam. Nearly 3 years of Ji Xu solid dike in the 15 ~ 16 dam