本文批判性地研讨了矩形水槽和梯形水渠之间亚临界流明渠过渡段的现有设计方法。根据一些基本原理,对于 Hinds 的过渡段设计方法给出了直接解法的建议。通过明渠过渡段的水流问题用流体力学的观点来观察,并对过渡段边界(即底宽、底部高程及边坡)的适应函数以部分分析和部分试验的方法予以鉴定。基于这些结果,提出了一个新的合理设计方法。 This paper critically discusses the current design of subcritical lumens transitions between rectangular flutes and trapezoidal channels. Based on some basic principles, a direct solution to the Hinds transitional design method is given. The problem of water flow in the transition section of open channel is observed from the viewpoint of hydrodynamics. The adaptive function of the transition section boundary (bottom width, bottom elevation and slope) is identified by partial analysis and partial test. Based on these results, a new rational design method is proposed.