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在前人研究的基础上,通过室内水槽试验,进一步研究了在流量、含沙量及水质影响下,分层运动中流速垂线的总体分布形态、分布规律、峰值及位置,以及清浑水界面位置等特征.结果表明,分层运动时,流速的垂线分布呈横向抛物线形;分层流区的近底区内流速遵循指数型分布规律,交混区和清水区内流速遵循修正后的高斯正常误差定律;分层流的峰速值越大,其位置越靠近河床;水流强度增加时,清浑水分界面位置向水面靠近,泥沙浓度增大时,界面位置向床面移动,而不同水质条件下的界面位置不同.
Based on the previous studies, we further studied the distribution, distribution, peak value and location of vertical velocities in stratified movement under the influence of flow, sediment concentration and water quality through the indoor tank test. The results show that the vertical distribution of flow velocity is in the shape of a transverse parabola when the stratified motion is observed. The velocity of the near bottom zone in the stratified flow follows the exponential distribution law and the flow velocity in the cross-mixing zone and the clean water zone follows the correction The higher the peak velocity of stratified flow, the closer its position to the riverbed. When the intensity of water flow increases, the location of the clear muddy water interface approaches the surface of the water. When the sediment concentration increases, the interface moves to the bed, Different water quality under different interface conditions.