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论述了面流消能五种流态旋滚后水面波动的统计参数与水力要素之间的关系、旋滚后水面波动沿程衰减规律，并总结为经验式。
The relationship between the statistic parameters of water surface fluctuation and the hydrodynamic factors of five kinds of fluid flow after surface flow energy dissipation is discussed.