人民长江
• 论文 • 上一篇 下一篇
王祥斌,吴龙华
出版日期:
发布日期:
WANG Xiangbin,WU Longhua
Online:
Published:
摘要: 为研究挺水植被在水流作用下发生的弯曲变形对水流阻力影响,通过明渠水槽实验对不同水流条件下单株挺水植被的弯曲变形状态及其水流阻力进行了观测分析。研究结果表明,挺水植被从完全直立转变为挺水弯曲摇摆状态时,水流阻力随着植被弯曲变形程度加剧而增加;当植被由挺水状态转为淹没状态时,水流阻力显著降低;当植被处于弯曲摇摆的淹没状态时,水流阻力同样会随着植被弯曲变形程度的加剧而增加;但是,当植被的弯曲变形增加到使得植被处于完全倒伏时,水流阻力反而会减少。研究成果有助于平衡河流生态治理与汛期泄洪的关系。
关键词: 挺水植被, 弯曲变形状态, 明渠水槽实验, 水流阻力, 相对有效高度
Abstract: In order to study the influence of emerged vegetation's bending deformation on flow resistance, open channel flume experiment was carried out to observe and analyze a single emerged vegetation's bending deformation and flow resistance under different flow conditions. The results showed that the flow resistance increased with the increase of vegetation's bending deformation when the vegetation changed from completely upright to curved and swaying emerged state. The flow resistance decreased significantly when vegetation changed from emerged state to submerged state. When the vegetation was in the submerged state of bending and swaying, the flow resistance would also increase with the aggravation of the vegetation's bending degree. However, when the bending deformation of vegetation increased to make the vegetation in a completely flattened state, the flow resistance would reduce. The research results are beneficial to balance the relationship between river ecological control and flood discharge in flood season.
Key words: emerged vegetation, bending deformation state, open channel flume experiment, flow resistance, relative effective height
王祥斌,吴龙华. 挺水植被弯曲变形对水流阻力的影响研究[J]. 人民长江, doi: 10.16232/j.cnki.1001-4179.2019.05.029.
WANG Xiangbin,WU Longhua. Influence of emerged vegetation bending deformation on flow resistance[J]. , doi: 10.16232/j.cnki.1001-4179.2019.05.029.
0 / / 推荐
导出引用管理器 EndNote|Ris|BibTeX
链接本文: http://www.rmcjzz.com/CN/10.16232/j.cnki.1001-4179.2019.05.029
http://www.rmcjzz.com/CN/Y2019/V50/I5/160