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1·Steady water surface profile of gradually varied flow can be calculated using either a steady flow approach or an unsteady flow approach.

使用计算机计算明渠恒定渐变流水面曲线有两种分法：恒定流方法和非恒定流方法。

2·The model is applied to calculate the transition water surface profiles from supercritical to gradually varied flow or from gradually varied flow to supercritical flow in rectangular open channel.

应用该模型对矩形明渠中缓、急流过渡的水面曲线进行了数值计算，并与理论解进行了比较。