| 茅泽育,马吉明,佘云童,吴剑疆.封冻河道的阻力研究[J].水利学报,2002,33(5):0059-0065 |
| 封冻河道的阻力研究 |
| Hydraulic resistance of ice covered river |
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| DOI： |
| 中文关键词: 封冻河道 流动阻力 糙率 流速分布 河冰水力学 |
| 英文关键词: ice covered river hydraulic resistance roughness velocity distribution river ice hydraulics |
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| 中文摘要: |
| 冰盖引起的流动阻力是研究河冰生消演变及其运动规律的关键问题之一。封冻阻力使河流水位壅高、过流能力降低、水位流量关系改变。本文应用 Prandtl半经验紊流理论，推导得到封冻河道水力要素间的理论关系表达式，并对冰盖影响区与床面影响区的交界位置进行了分析讨论；对由流速分布推算冰盖及河床糙率的计算方法进行了研究，并与现场实测资料进行了验证。 |
| 英文摘要: |
| A method for determining the roughness of ice coevered rivers is presented. The Prandtl semi empirical turbulent theory is applied to deduce the expression of the relationship between the hydraulic factors of ice covered rivers. On this basis, the roughness of the river is obtained according to the measured velocity distribution. |
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