本文根据黄河主要干支流冲积河段实测高含沙洪水的输沙资料，从黄河下游河道比降、河宽、流速沿程调整、洪水非恒定性等方面分析研究了冲积河道输沙特性与河床冲淤特性。
The variations of slope and width, adjustments of flow velocity along the river course as well as the variability of flood in the Yellow River are analyzed based on the observation data.
这些河道最常见于近冲积扇体的顶端。
These channels are most common near the apex of the alluvial fan body.
沙波运动是冲积河流泥沙运动的一种重要形式。沙波的消长对河道水流的阻力损失有很大的影响。
Sand wave movement is an important form of sediment movement for alluvial rivers and has a great effect on stream resistance.
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