By analvzing the characteristics of erosion-deposition variation and channel shrinkage in the tail reaches of Yellow River estuary since the tail reaches of Yellow River estuary changed to Qingshuigou flow path in 1976, the relationship between the bankfull discharge at Lijin station and the incident runoff and sediment as well as the extension of river length was studied. The results show that the bankfull discharge in tail reaches of Yellow River estuary relates with the runoff volume, flood peak discharge, coefficient of water and sediment, channel length and preceding bed-channel conditions. The quantitative relationship among the water volume, the peak discharge and the coefficient of the water and the sediment load for the bankfuil discharge of 4000m3/s as well as the restriction conditions for the channel length is proposed. It may provide a reference for the integrated management of tail reaches.%通过分析1976年清水沟流路以来黄河河口尾闾河道冲淤变化及河槽萎缩特点,探讨了利津平滩流量变化对来水来沙及河口延伸的关系.结果表明:河口区平滩流量变化不仅与来水量、洪峰流量、水沙搭配系数、河口河长相关,而且与前期河床条件有关.给出了维持河口河道4000m3/s平滩流量需要的水量、洪峰流量及水沙搭配的定量关系以及河口延伸长度的限制条件,为河口尾闾河道的综合治理提供一定的参考.
展开▼
