Turbulence Affected by Submerged Auqatic Vegetation under Wind- induced Flow

Turbulence Affected by Submerged Auqatic Vegetation under Wind- induced Flow | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Turbulence Affected by Submerged Auqatic Vegetation under Wind- induced Flow Chenhui Wu, Jiang Deng, Xiaojie Zhou, Ang Gao, Kedong Feng, Chunyue Zhu This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4642161/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Submerged aquatic vegetation (SAV) changes the turbulent structure of rivers, wetlands, estuaries, and lakes. However, few studies have focused on the influence of SAV on hydrodynamic characteristics under wind-induced flow. Therefore, laboratory experiments were conducted to study the effects of SAV on the flow structure and turbulence characteristics under wind-induced flow and spectral based decomposition method were used to separate turbulence and wave velocity. Result shows that SAV reduced local velocity within canopy and elevates the location of the zero-velocity point. The canopy drag caused by SAV increase the decay rate of turbulent Reynolds stress along depth while hardly influence wave Reynolds stress. Canopy drag depress the turbulent RMS velocity and wave orbital velocity, the suppression of turbulence by SAV is greater compared to the impact on wind-wave. The presence of SAV leads to the decrease in TKE production and dissipation rate within canopy. The canopy drag more effectively diminishes TKE production than it does the dissipation. Research on local isotropy of SAV in wind-induced flows shows that the presence of SAV promotes a gradual transition from local anisotropy to local isotropy in turbulence within canopy. And quadrant analysis reveals that the presence of SAV reduced the probabilities and the contribution to turbulent momentum of ejection and sweep. Earth and environmental sciences/Environmental sciences Earth and environmental sciences/Hydrology Earth and environmental sciences/Limnology vegetated flow wind-induced flow PIV hydrodynamics turbulence Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4642161","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":329882457,"identity":"4357b1f3-9c07-41e3-a9a4-1d11a6c88fd9","order_by":0,"name":"Chenhui Wu","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAxklEQVRIiWNgGAWjYHACNmaGin/MUDbRWs6wkaqFsQ2mlBgtBjeSnz0unMfDbnC8x4DhQ9lhBv7ZDYS0pJkbz9wmwWxw5owB44xzhxkk7hzAr8XsRg6bNO82A2Ygw4CZt+0wg4FEAjFa5iQwm91/Y8D8l3gtDQeAtvAYAMOBCC32Z56ZSfMcO8Bsfyat4GDPuXQeiRsEtEi2Jz+T5qn5lyzZfnjjgx9l1nL8MwhogYFkEHEAiHmIUw8EdkSrHAWjYBSMgpEHAA2XPl61qlCoAAAAAElFTkSuQmCC","orcid":"","institution":"Zhejiang University of Water Resources and Electric Power","correspondingAuthor":true,"prefix":"","firstName":"Chenhui","middleName":"","lastName":"Wu","suffix":""},{"id":329882460,"identity":"4cf376d8-d18e-4cd5-bdde-ba7eeeecbc9c","order_by":1,"name":"Jiang Deng","email":"","orcid":"","institution":"Southern Taihu Municipal Construction Co., Ltd","correspondingAuthor":false,"prefix":"","firstName":"Jiang","middleName":"","lastName":"Deng","suffix":""},{"id":329882462,"identity":"82029bc7-506d-462e-8a60-b6d45113624c","order_by":2,"name":"Xiaojie Zhou","email":"","orcid":"","institution":"Southern Taihu Municipal Construction Co., Ltd","correspondingAuthor":false,"prefix":"","firstName":"Xiaojie","middleName":"","lastName":"Zhou","suffix":""},{"id":329882464,"identity":"5aff86b5-1a1c-415f-9282-5f7a5cc92287","order_by":3,"name":"Ang Gao","email":"","orcid":"","institution":"Nanjing Hydraulic Research Institute","correspondingAuthor":false,"prefix":"","firstName":"Ang","middleName":"","lastName":"Gao","suffix":""},{"id":329882465,"identity":"9be7f7e3-8358-4a34-bf63-3480c9fa7201","order_by":4,"name":"Kedong Feng","email":"","orcid":"","institution":"Nanjing Hydraulic Research Institute","correspondingAuthor":false,"prefix":"","firstName":"Kedong","middleName":"","lastName":"Feng","suffix":""},{"id":329882467,"identity":"e254ca84-535e-464e-be4f-4338bf2ba699","order_by":5,"name":"Chunyue Zhu","email":"","orcid":"","institution":"Zhejiang University of Water Resources and Electric Power","correspondingAuthor":false,"prefix":"","firstName":"Chunyue","middleName":"","lastName":"Zhu","suffix":""}],"badges":[],"createdAt":"2024-06-26 10:56:10","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4642161/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4642161/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":63918814,"identity":"1e74828e-1042-4b87-8562-22aed8a1418b","added_by":"auto","created_at":"2024-09-03 18:44:36","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1980679,"visible":true,"origin":"","legend":"","description":"","filename":"TurbulenceAffectedbySubmergedAuqaticVegetationunderWindinducedFlowrevised0630.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4642161/v1_covered_b6d31ce6-15b3-4260-bd2b-c16103261089.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Turbulence Affected by Submerged Auqatic Vegetation under Wind- induced Flow","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"vegetated flow, wind-induced flow, PIV, hydrodynamics, turbulence","lastPublishedDoi":"10.21203/rs.3.rs-4642161/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4642161/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eSubmerged aquatic vegetation (SAV) changes the turbulent structure of rivers, wetlands, estuaries, and lakes. However, few studies have focused on the influence of SAV on hydrodynamic characteristics under wind-induced flow. Therefore, laboratory experiments were conducted to study the effects of SAV on the flow structure and turbulence characteristics under wind-induced flow and spectral based decomposition method were used to separate turbulence and wave velocity. Result shows that SAV reduced local velocity within canopy and elevates the location of the zero-velocity point. The canopy drag caused by SAV increase the decay rate of turbulent Reynolds stress along depth while hardly influence wave Reynolds stress. Canopy drag depress the turbulent RMS velocity and wave orbital velocity, the suppression of turbulence by SAV is greater compared to the impact on wind-wave. The presence of SAV leads to the decrease in TKE production and dissipation rate within canopy. The canopy drag more effectively diminishes TKE production than it does the dissipation. Research on local isotropy of SAV in wind-induced flows shows that the presence of SAV promotes a gradual transition from local anisotropy to local isotropy in turbulence within canopy. 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