Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/3950
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dc.contributor.authorFranca, Mário J.-
dc.contributor.authorFerreira, Rui M. L.-
dc.contributor.authorLemmin, Ulrich-
dc.date.accessioned2008-09-01T09:46:23Z-
dc.date.available2008-09-01T09:46:23Z-
dc.date.issued2008en_US
dc.identifier.citationAdvances in Water Resources. 31:6 (2008) 915-925en_US
dc.identifier.urihttp://hdl.handle.net/10316/3950-
dc.description.abstractThe logarithmic layer of double-averaged (in time and space) streamwise velocity profiles obtained from field measurements made in the Swiss rivers, Venoge and Chamberonne is parameterized and discussed. Velocity measurements were made using a 3D Acoustic Doppler Velocity Profiler. Both riverbeds are hydraulically rough, composed of coarse gravel, with relative submergences (h/D50) of 5.25 and 5.96, respectively. From the observations, the flow may be divided into three different layers: a roughness layer near the bed, an equivalent logarithmic layer and a surface or outer layer. It was found that a logarithmic law can describe the double-averaged profiles in the layer 0.30 < z/h < 0.75. The parameterization of the logarithmic law is discussed. Special emphasis is given to the geometric parameters roughness and zero-displacement heights and to the equivalent von Karman constant.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/B6VCF-4S33NBV-1/1/bbf4c14ea5ed4a1062a36f1c5b373f12en_US
dc.format.mimetypeaplication/PDFen
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectDouble-averaged velocity profilesen_US
dc.subjectLogarithmic lawen_US
dc.subjectVelocity field measurementsen_US
dc.titleParameterization of the logarithmic layer of double-averaged streamwise velocity profiles in gravel-bed river flowsen_US
dc.typearticleen_US
item.languageiso639-1en-
item.fulltextCom Texto completo-
item.grantfulltextopen-
crisitem.author.researchunitMARE - Marine and Environmental Sciences Centre-
crisitem.author.orcid0000-0002-0265-8581-
Appears in Collections:FCTUC Eng.Civil - Artigos em Revistas Internacionais
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