| 含淹没植物的水流阻力试验研究 |
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| 引用本文： | 佘伟伟,李艳红,喻国良.含淹没植物的水流阻力试验研究[J].水利水电技术,2010,41(3). |
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| 作者姓名： | 佘伟伟 李艳红 喻国良 |
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| 作者单位： | 上海交通大学船舶海洋与建筑工程学院,上海,200240 |
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| 基金项目： | 国家高技术研究发展计划项目 |
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| 摘 要： | 河道中存在水生植物会改变水流阻力,在大多数情况下会导致水位抬高,降低河道的泄洪能力。然而,水生植物的存在对河道治理、边滩保护、水质净化等起积极作用。为了探索河道中水生植物对水流阻力的影响,在实验室水槽中进行了不同密度的流淹没刚性植物水流试验,观测了沿程的水位变化,计算了水面坡降,基于试验资料分析了雷诺数、植物密度对糙率系数的影响,并建立拖曳力同植物水流特征粗糙度对数关系表达式,丰富了植物条件下明渠流动的试验观测资料数据库。
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| 关 键 词： | 含植物河流 水流阻力 水面坡降 曼宁糙率 流速 |
Experimental study on resistance to flow through submerged vegetation |
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| SHE Weiwei,LI Yanhong,YU Guoliang.Experimental study on resistance to flow through submerged vegetation[J].Water Resources and Hydropower Engineering,2010,41(3). |
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| Authors: | SHE Weiwei LI Yanhong YU Guoliang |
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| Affiliation: | SHE Weiwei,LI Yanhong,YU Guoliang(School of Naval Architecture,Ocean , Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China) |
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| Abstract: | In vegetated rivers,aquatic plants change the resistance and decreasing flow speed,in most instances they enlarge water level and reduce flood discharge.However,they make positive contribution to river regulation,bank protection and water quality promotion.In order to find the impact on flow resistance by aquatic plants,flume experiments are made with submerged rigid plants in vary densities.The variation of water level along flow distance is observed,hydraulic gradient is calculated and the impact on rough... |
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| Keywords: | vegetated river flow resistance hydraulic gradient Manning roughness coefficient flow velocity |
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