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中文摘要：
床面形态变化是河床演变的重要方面。如何根据水流和泥沙条件,预测床面可能出现的形态,一直是航道整治与泥沙研究所关心的实际问题。水流阻力规律是水流流动及床面形态等综合特征的反映,反演适当的阻力规律表达式,应能够区分出不同的床面形态。本文正是基于这一理念,通过建立包含床面形态参数的河流水流阻力规律表达形式,并结合水槽试验,得到了确定床面形态的无量纲特征参数,以此对不同床面形态进行区分,绘制出相应床面形态划分图,进而得到了高、低能态时不同床面形态间的分界线方程。该方程可用于对河床形态进行判别与预测,对河流整治具有指导作用。
英文摘要：
The variation of the bed forms exerts vital influence on river evolution. Predicting possible bed forms grounded on the conditions of flow and sediment transportation has always been a practical concern in channel regulation and sediment research. The law of resistance is the reflection of flow, bed forms and other features. Therefore, analyzing the law of resistance could be used to distinguish the boundary between different bed forms. Based on the law of resistance and the existing flume experimental data, two dimension- less bed form parameters, as well as the boundaries between various bed forms are proposed. Different bed forms are demonstrated in the distribution diagram, and the boundary equations between different bed forms in both high and low flow regimes are also obtained. The equations can be used to identify and forecast bed forms, and which could guide the channel regulation.
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