1 各次洪水简况黄河花园口站有水文记载以来的最大洪水出现在1958年7月,简称“58·7”洪水,最大流量为22300m~3/S,最高水位换算到现在的断面为93.82m。从1959年至今40年来共发生过三次较大洪水。1.1 “96·8”洪水。洪峰起涨水位为93.50m,峰顶水位为94.73m。水位上涨值为1.23m。起涨流量为2500m~3/S,峰顶流量为7860m~3/S,流最上涨值为5360m~3/S,由起涨到落平洪水历时160h。洪水总量为26.2亿m~3。洪峰期最大含沙量为149kg/m~3,出现 1 The Floods of Each Flood The largest flood in Huayuankou Hydrological Station since July, 1958, referred to as “58.7” flood, the maximum flow is 22300m ~ 3 / S, and the maximum water level converted to the present section is 93.82m. Three major floods occurred from 1959 to the present 40 years. 1.1 “96.8” flood. Peak water level rise 93.50m, the peak water level of 94.73m. The water level rises to 1.23m. From the rise of 2500m ~ 3 / S, the peak flow of 7860m ~ 3 / S, the maximum value of the flow of 5360m ~ 3 / S, from rising to falling flood lasted 160h. The total flood was 2.62 billion m ~ 3. Peak maximum sediment 149kg / m ~ 3, appeared