拱网为小型工程特别是渠系建筑物低佛氏数底流消能开辟了一条新途径。

Arch net floor has opened up a new way for the small-sized works, expecially for the canal system structures of low FroudaNumber underflow energy dissipation.

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研究分析了水流的平均波高、波动能量、各波动要素随流程和随佛氏数的变化规律，以及波动沿频域的分布情况等等。

This article analyses the average height of wave, the energy of wave, and their changeable rules with Froude, distance and frequency.

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提高低佛氏数水跃的消能率，解决低水头泄水建筑物的下游消能防冲问题，无论从技术还是从经济上来讲都是非常重要的。

Improve the rate of energy dissipation for low Fr hydraulic jump and solve the problem of energy dissipation and erosion , no matter from the technical or economically is very important.

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提高低佛氏数水跃的消能率，解决低水头泄水建筑物的下游消能防冲问题，无论从技术还是从经济上来讲都是非常重要的。

Improve the rate of energy dissipation for low Fr hydraulic jump and solve the problem of energy dissipation and erosion , no matter from the technical or economically is very important.

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