长期以来，人们一直用临界流速或临界佛汝德数的准则来确定冰塞的演变。
The critical velocity, or critical Froude number criterion has long been accepted as a means of determining frazil jam profiles.
在一定坡度不同流量条件下，道路坡面径流弗汝德数随径流历时增长而减小。
Froude number of slope runoff of road decreased with runoff duration under a certain slope and the different flow discharges.
研究了宽尾墩位置、始扩点水流佛汝德数与堰上水头之间的关系，导出了与水头损失、闸门宽度有关的计算公式。
It is shown that the relationship exists among the location of the flaring gate piers, the Froude number at the section of starting flare, the weir head, the head loss and the gate width.
研究了宽尾墩位置、始扩点水流佛汝德数与堰上水头之间的关系，导出了与水头损失、闸门宽度有关的计算公式。
It is shown that the relationship exists among the location of the flaring gate piers, the Froude number at the section of starting flare, the weir head, the head loss and the gate width.
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