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引海水冲刷黄河河口段河槽是解决黄河下游泥沙淤积的一种新思路。为确定引用海水的流量大小和冲刷的时机及历时 ,经长水槽概化动床模型试验 ,分别得出了注入点下游沿程冲刷过程、平衡比降以及注入点上游溯源冲刷的过程和平衡比降。得出了计算两种平衡比降的经验公式 ,并用中国水科院试验的成果进行了验证。这些成果补充了黄河大流量低含沙量条件下的河道平衡比降计算方法 ,为引海水冲刷方案的确定提供了依据。
Seawater erosion of the Yellow River estuarine channel is a new idea to solve the sediment deposition in the lower Yellow River. In order to determine the flow rate of reference seawater and the time and duration of scouring, the process of scouring along the downstream of the injection point, the balance drop and the traceable scouring upstream of the injection point and the equilibrium ratio drop. The empirical formula for calculating the two balance ratios is obtained and verified by the results of the experiment of China Hydrology Bureau. These results complement the calculation method of river balance ratio under the condition of low sediment concentration in the Yellow River, which provides a basis for the determination of seawater scouring scheme.