通过对坡面雨滴溅蚀过程的分析．提出了雨滴溅蚀有效坡段的概念。在坡面流近似为运动波的条件下，利用Ｇｏｖｉｎｄａｊｕ等提出的坡面流分离变量形式，导出了坡面流的微分基本方程及其近似解。最后利用有效坡段和坡面流近似解．讨论了ＧｕｙＢＴ坡面流输沙能力公式的应用范围。本文的研究．对了解坡面流输沙能力ｑ（ｘ，ｔ）的变化规律有重要意义。 Analysis of raindrop splashing process on slope. The concept of effective raindrop splashing is proposed. Under the condition that the slope flow is similar to the moving wave, the differential basic equation of the slope flow and its approximate solution are derived by using the form of slope flow separation variables proposed by Govindaju et al. Finally, the effective slope and slope flow approximation solution. The application of GuyBT slope flow and sediment transportability formula is discussed. The research of this paper. It is of great significance to understand the variation of sediment transport capacity q (x, t).