| 高棵水生植物的阻力系数在非淹没与淹没条件下的相互换算 |
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| 引用本文： | 顾峰峰,倪汉根,戚定满.高棵水生植物的阻力系数在非淹没与淹没条件下的相互换算[J].水科学进展,2007,18(6):823-828. |
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| 作者姓名： | 顾峰峰 倪汉根 戚定满 |
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| 作者单位： | 1.上海河口海岸科学研究中心, 上海, 201201; |
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| 基金项目： | 国家自然科学基金;中国近海海洋综合调查与评价908专项 |
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| 摘 要： | 通过模型试验测定了渠道中一种高棵、密集分布的植物,在淹没情况下的断面流度分布曲线及糙率和水深关系曲线;根据文献资料假设了植物区内的流速为均匀分布,并预测了非植物区内的流速分布,经过与实测值比较,符合较好;在这个断面流速分布的基础上,通过理论推导,得到了非淹没和淹没情况下糙率系数的换算关系;并给出了用植物模型在非淹没时的糙率系数~水深关系曲线延伸得到淹没时的糙率~水深关系曲线的实例,模型试验的结果也验证了这一换算关系。
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| 关 键 词： | 高棵水生植物 阻力系数 流速分布 淹没 相互换算 |
| 文章编号： | 1001-6791（2007）06-0823-06 |
| 收稿时间： | 2006-11-13 |
| 修稿时间： | 2007-03-12 |
Transition of long-stalk vegetation resistance coefficient between unsubmerged condition and submerged condition |
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| GU Feng-feng,NI Han-gen,QI Ding-man.Transition of long-stalk vegetation resistance coefficient between unsubmerged condition and submerged condition[J].Advances in Water Science,2007,18(6):823-828. |
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| Authors: | GU Feng-feng NI Han-gen QI Ding-man |
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| Affiliation: | 1.Estuary and Coastal Scientific Research Institute of the Ministry of Communication, Shanghai 201201, China;2.School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | The vertical velocity distributions in the vegetated channel and the relationship between resistance coefficient and flow depth were measured in laboratory experiments.Based on the assumption that the velocity in the region with vegetation keeps constant,the velocity distributions above the top of vegetation may be well predicted which closely fit the results of the experiment.And then the relationship between the resistane coefficient and flow depth for the vegetations under the unsubmerged and submerged conditions is deduced theoretically.Finally an example is given that the relationship between n and h for reeds is extended successfully from unsubmerged to submerged condition,and some experimental results approve such a conversion. |
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| Keywords: | long-stalk vegetation resistance coefficient velocity distribution suberged transition |
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