Application of HEC-HMS, in which unit hydrographs were used, in Yandu river watershed was performed.The results show that the simulated flood hydrographs is coincident with the observed ones.

• 将分析的单位线用于HEC-HMS并在沿渡河流域进行实例应用，结果表明，模拟过程与实测过程拟合较好。