在分析激光测速试验资料基础上，通过与正坡上流速分布特性比较，发现负坡垂线流速分布中Karman常数相对正坡为小，负坡上的非均匀流粘性底层范围和厚度均大于正坡上的非均匀流粘性底层范围和厚度等；并在试验基础上提出了统一的垂线流速分布公式。研究成果为进一步研究负坡水流水力特性提供了参考。

On the basis of the experimental data measured with a LDA system, vertical velocity distributions are well compared for negative and positive gradient of slopes in different hydraulic conditions in an open channel. It’s concluded as follows: With Froude number increase, Karman constant decrease. A unified formula to describe velocity distribution in adverse slope is proposed and well testified.Viscous sublayer thickness and buffer layer scope in adverse slope are both bigger than those in slope. The authors draw some valuable conclusions and provide some references for the further study about hydraulic characteristics in adverse slope.