水流与水生植物的相互作用:使用立体粒子图像测速法的实地研究

IF 4.6 Q2 ENVIRONMENTAL SCIENCES Journal of ecohydraulics Pub Date : 2019-05-23 DOI:10.1080/24705357.2019.1606677
H. Biggs, V. Nikora, C. Gibbins, S. Cameron, K. Papadopoulos, Michael Stewart, S. Fraser, D. Vettori, M. Savio, M. O’Hare, M. Kucher, D. Hicks
{"title":"水流与水生植物的相互作用:使用立体粒子图像测速法的实地研究","authors":"H. Biggs, V. Nikora, C. Gibbins, S. Cameron, K. Papadopoulos, Michael Stewart, S. Fraser, D. Vettori, M. Savio, M. O’Hare, M. Kucher, D. Hicks","doi":"10.1080/24705357.2019.1606677","DOIUrl":null,"url":null,"abstract":"Abstract This paper reports the morphology of a natural patch of Ranunculus penicillatus and presents high-resolution measurements of flow velocities in its wake using a stereoscopic PIV field measurement system. The patch was 3.80 m long, 1.24 m wide and caused substantial changes to downstream mean velocities and turbulence. Vertical profiles of streamwise mean velocity were not logarithmic and flow was redirected under the positively buoyant canopy, enhancing vertical turbulent mixing in the wake and generating a large region where the velocity covariance was positive. Turbulent kinetic energy was enhanced downstream from the patch lateral shear layer, but not at the centre of the wake. Spectra downstream from the patch showed that turbulence was neither dominated by fine-scale nor large-scale structures, likely due to the low energy of the flow conditions and lack of a developed vortex street within the measurement domain. Sedimentation was observed at the upstream end of the patch, but not underneath the floating canopy. The methods and results of this work will be useful for planning other in situ studies. Also, the reported data on macrophyte geometry and biometrics will assist with the design of more realistic replicas for use in laboratory studies.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":"122 1","pages":"113 - 130"},"PeriodicalIF":4.6000,"publicationDate":"2019-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"25","resultStr":"{\"title\":\"Flow interactions with an aquatic macrophyte: a field study using stereoscopic particle image velocimetry\",\"authors\":\"H. Biggs, V. Nikora, C. Gibbins, S. Cameron, K. Papadopoulos, Michael Stewart, S. Fraser, D. Vettori, M. Savio, M. O’Hare, M. Kucher, D. Hicks\",\"doi\":\"10.1080/24705357.2019.1606677\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract This paper reports the morphology of a natural patch of Ranunculus penicillatus and presents high-resolution measurements of flow velocities in its wake using a stereoscopic PIV field measurement system. The patch was 3.80 m long, 1.24 m wide and caused substantial changes to downstream mean velocities and turbulence. Vertical profiles of streamwise mean velocity were not logarithmic and flow was redirected under the positively buoyant canopy, enhancing vertical turbulent mixing in the wake and generating a large region where the velocity covariance was positive. Turbulent kinetic energy was enhanced downstream from the patch lateral shear layer, but not at the centre of the wake. Spectra downstream from the patch showed that turbulence was neither dominated by fine-scale nor large-scale structures, likely due to the low energy of the flow conditions and lack of a developed vortex street within the measurement domain. Sedimentation was observed at the upstream end of the patch, but not underneath the floating canopy. The methods and results of this work will be useful for planning other in situ studies. Also, the reported data on macrophyte geometry and biometrics will assist with the design of more realistic replicas for use in laboratory studies.\",\"PeriodicalId\":93201,\"journal\":{\"name\":\"Journal of ecohydraulics\",\"volume\":\"122 1\",\"pages\":\"113 - 130\"},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2019-05-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"25\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of ecohydraulics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1080/24705357.2019.1606677\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of ecohydraulics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/24705357.2019.1606677","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 25

摘要

摘要本文报道了毛茛(Ranunculus penicillatus)天然斑块的形态,并利用立体PIV场测量系统对其尾迹进行了高分辨率的流速测量。该斑块长3.80 m,宽1.24 m,导致下游平均速度和湍流度发生实质性变化。在正浮力冠层下,向流平均速度的垂直剖面不是对数的,流动被重定向,增强了尾迹中的垂直湍流混合,并产生了一个很大的速度协方差为正的区域。湍流动能在斑块侧切变层下游增强,但在尾流中心没有增强。斑块下游的光谱显示,湍流既不以细尺度结构为主,也不以大尺度结构为主,这可能是由于流动条件的能量较低,并且在测量域内缺乏发达的涡街。在斑块的上游端观察到沉积,但在浮冠下没有。这项工作的方法和结果将有助于规划其他实地研究。此外,报告的关于大型植物几何和生物计量学的数据将有助于设计用于实验室研究的更真实的复制品。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Flow interactions with an aquatic macrophyte: a field study using stereoscopic particle image velocimetry
Abstract This paper reports the morphology of a natural patch of Ranunculus penicillatus and presents high-resolution measurements of flow velocities in its wake using a stereoscopic PIV field measurement system. The patch was 3.80 m long, 1.24 m wide and caused substantial changes to downstream mean velocities and turbulence. Vertical profiles of streamwise mean velocity were not logarithmic and flow was redirected under the positively buoyant canopy, enhancing vertical turbulent mixing in the wake and generating a large region where the velocity covariance was positive. Turbulent kinetic energy was enhanced downstream from the patch lateral shear layer, but not at the centre of the wake. Spectra downstream from the patch showed that turbulence was neither dominated by fine-scale nor large-scale structures, likely due to the low energy of the flow conditions and lack of a developed vortex street within the measurement domain. Sedimentation was observed at the upstream end of the patch, but not underneath the floating canopy. The methods and results of this work will be useful for planning other in situ studies. Also, the reported data on macrophyte geometry and biometrics will assist with the design of more realistic replicas for use in laboratory studies.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
CiteScore
7.10
自引率
0.00%
发文量
0
期刊最新文献
Urban stormwater management from the perspective of nature-based solutions: a bibliometric review Low-cost field particle image velocimetry for quantifying environmental turbulence Flood dynamics and its spatial prediction using open-channel hydraulics and hydrodynamic model in the dam-controlled river of India Forecasting green tide events in a semi-closed tidal flat using artificial intelligence and environmental big data Evaluating Apple iPhone LiDAR measurements of topography and roughness elements in coarse bedded streams
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1