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dc.contributor.authorLi, D.
dc.contributor.authorHuai, W.
dc.contributor.authorGuo, Yakun
dc.contributor.authorLiu, M.
dc.date.accessioned2022-03-22T14:39:28Z
dc.date.accessioned2022-03-30T09:50:38Z
dc.date.available2022-03-22T14:39:28Z
dc.date.available2022-03-30T09:50:38Z
dc.date.issued2022-05
dc.identifier.citationLi D, Huai W, Guo Y et al (2022) Flow characteristics in partially vegetated channel with homogeneous and heterogeneous layouts. Environmental Science And Pollution Research. 29(25): 38186-38197.en_US
dc.identifier.urihttp://hdl.handle.net/10454/18826
dc.descriptionYesen_US
dc.description.abstractThis study presents the experimental results of the flow characteristics, such as the flow adjustment, velocity profiles, mixing layer, and the momentum exchange, in the partially vegetated channel with homogeneous and heterogeneous layouts. Three cases are considered, including two homogeneous canopies with uniform sparse and dense vegetation patches respectively, and a heterogeneous canopy consisting of alternating patches of both densities. Results show that heterogeneous canopy requires a longer adjustment distance to reach the quasi-equilibrium region, compared with the homogenous canopy of the same density. In heterogeneous canopy flow, the mixing layer width and the momentum thickness fluctuates with the alternation of vegetation density. The increased values for these two parameters compared to those values for the homogeneous canopies indicate that the greater resistance and momentum loss occur for the heterogeneous layout. A wavy region of the enhanced in-plane turbulence kinetic energy (TKE) is observed in the heterogeneous canopy, suggesting a comparatively more chaotic flow condition, whereas the contours of in-plane TKE are smooth in homogeneous canopies. The presence of the coherent structures in heterogeneous canopy is identified by spectral analysis and the quasi-periodic fluctuations of velocities. The Reynolds stress associated with the coherent structures is found to be the dominator of the contribution to the total Reynolds stress. The comparison between the homogenous canopies of different density is also conducted. These results will be of practical importance for the design of vegetation layouts in water ecological restoration projects and for river management.en_US
dc.description.sponsorshipNational Natural Science Foundation of China (grant numbers 52020105006 and 11872285) and the Open Funding of State Key Laboratory of Water Resources and Hydropower Engineering Science (WRHES), Wuhan University (Project number 2018HLG01)en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttps://doi.org/10.1007/s11356-021-18459-2en_US
dc.subjectFlow characteristicsen_US
dc.subjectHeterogeneous canopyen_US
dc.subjectHomogeneous canopyen_US
dc.subjectPartially vegetated channelen_US
dc.titleFlow characteristics in partially vegetated channel with homogeneous and heterogeneous layoutsen_US
dc.status.refereedYesen_US
dc.date.Accepted2021-12-29
dc.date.application2022-01-24
dc.typeArticleen_US
dc.date.EndofEmbargo2023-01-24
dc.type.versionAccepted manuscripten_US
dc.description.publicnotesThe full-text of this article will be released for public view at the end of the publisher embargo on 24 Jan 2023.
dc.rights.licenseUnspecifieden_US
dc.date.updated2022-03-22T14:39:30Z
refterms.dateFOA2022-03-30T09:51:05Z
dc.openaccess.statusembargoedAccessen_US


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