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中文摘要：
在 unsubmerged 条件下面的粗糙系数上的密度，叶子和茎灵活性的影响例如 Mannings n，试验性地被调查。一个乐器学系统为测量在不同人工的 foliated 芦苇的条件下面从 0.1 ～ 0.3 L/s 的流动率被开发了。基于试验性的结果，对在有不同密度的 n 之间的关系的影响，叶子，灵活性和流动深度被讨论。叶子和密度是影响 Mannings n 的重要因素，这被发现。在相对低的速度的一个范围和茎的相对大的弯曲僵硬， Mannings n 是由茎的灵活性的没影响的 significanthy。
英文摘要：
The influence of density,foliage and stem flexibility on the roughness coefficients under unsubmerged conditions,such as Manning＇s n,is investigated experimentally.An instrumentation system has been developed for measuring the flow rate ranging from 0.1 to 0.3 L/s under the condition of different artificial foliated reeds.Based on the experimental results,the influence on the relationship between n with different density,foliage,flexibility and flow depth is discussed.It is found that the foliage and the density are the important factors affecting Manning＇s n.At a range of relatively low velocity and relatively large bending stiffness of stem,Manning＇s n is not influenced significanthy by the flexibility of stem.
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