The developed rainfall-runoff models with unit hydrograph mainly focus on simulating surface runoff, only a small number of models can be used for subsurface runoff.

• 摘要过去发展之以单位历线为主之降雨-迳流模式大多只限于模拟地表迳流，对于地表下迳流之演算仅有少数几种模式可资应用。