小流域设计洪水的计算方法

采用蓄满产流模型，根据流域形状不同，导出了相应的小流域设计洪水计算公式。公式的应用中考虑了雨量时间分布，不仅可直接计算出设计洪水的洪峰流量，而且还可以计算出设计洪水过程，使小流域设计洪水计算更加合理。文中结合江西良田流域实例，采用本文研究成果，推求出的设计洪水过程，成果合理，计算方法简单易行。

Calculation Method of Design Flood for Small Watershed

A set of calculation formulas of design flood for small watersheds is derived from the Xinanjiang model based on different geomorphic conditions. In these formulas, the time distribution of precipitation is considered. These formulas can not only be used to determine the peak discharge of design flood directly, but also can develop the hydrograph, making the estimation more reasonable. The Liangtian watershed, Jiangxi province is chosen as an example to develop the design flood hydrograph with the present formula.