一、前言大暴雨期间林道冲毁,大多是由林道涵洞排水能力下降所致。排水能力下降,常常是由于沉积物及剩余有机物在涵洞口或涵洞内堵塞流水所造成。因此,在设计林道涵洞时,不仅要提供充分的排水能力,还必须提供充分的沉积物及剩余有机的排泄能力。但现行的设计标准没有考虑沉积物和剩余有机物。在本文中,我们应用管道沉积物运输理 I. Preface The forest road washed away during the heavy rainstorm, mostly due to the decrease of drainage capacity of the forest culvert. Drainage capacity is reduced, often due to sediment and residual organic matter in the culvert or culvert blocked water flow caused. Therefore, in designing forest culverts, not only must adequate drainage capacity be provided, but adequate sediment and residual organic drainage capacity must also be provided. However, current design standards do not consider sediments and residual organic matter. In this article, we use pipe sediment transport management