以理论分析为基础 ,利用黄河下游洪水期实测水文资料 ,分析了游荡性河道主槽宽度变化对洪水水位涨率的影响 ,阐明了不同含沙量洪水水位表现的内在联系。结合窄河段水位涨率变化特点 ,探讨了主槽宽度、河道比降对洪水水位涨率的定量影响。黄河下游洪水水位涨率总体上与主槽宽度成反比 ,但当主槽宽度大于 10 0 0m时 ,对水位涨率的影响程度明显降低 Based on the theoretical analysis, the hydrological data from the flood season in the lower Yellow River are used to analyze the influence of the main channel width of the wandering channel on the rising rate of flood water level, and the inherent relationship between the performance of different levels of flood water level is clarified. Combined with the characteristics of water level rise in narrow reach, the quantitative effects of main channel width and river ratio on flood water level rise were discussed. The rate of flood water level rise in the lower Yellow River is generally inversely proportional to the width of the main channel. However, when the width of the main channel is more than 100m, the impact on the rate of water level rise is obviously lower