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dc.creatorKeramaris E., Pechlivanidis G.I., Pechlivanidis I.G.en
dc.date.accessioned2023-01-31T08:43:13Z
dc.date.available2023-01-31T08:43:13Z
dc.date.issued2015
dc.identifier10.1007/s40710-015-0103-5
dc.identifier.issn21987491
dc.identifier.urihttp://hdl.handle.net/11615/74850
dc.description.abstractThis paper investigates the different impact of a half-separated gravel and vegetated bed in open channels. This experimental investigation is based on the 2D Particle Image Velocimetry (PIV) method, which allows data acquisition at fine spatial-temporal resolution. For the simulation of the two porous beds: a) a grass-like vegetation and b) gravel bed of 2 cm height were used to represent the permeable bed. Velocity is measured: a) at the central line of 3.75 cm above the interface of vegetated and gravel bed, b) over the vegetated bed and c) over the gravel bed for different discharges and for the same different total heights. In total, 27 experiments were carried out. Results show that the presence of a half-separated gravel and vegetated bed influences significantly the velocity distribution in comparison with a simple permeable bed (vegetated or gravel). This is due to the fact that the presence of gravel bed in the half-separated bed decreases the velocity of the flow in regard to the simple vegetated or gravel bed due to the great roughness which is observed near the surface gravel-vegetated bed. This fact increases the turbulence and reduces the velocity. Also, the presence of half-separated gravel and vegetated bed influences the values of velocity distribution in a different way in comparison with situations over of half-separated impermeable and permeable bed. © 2015 Springer International Publishing Switzerland.en
dc.language.isoenen
dc.sourceEnvironmental Processesen
dc.source.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84950319646&doi=10.1007%2fs40710-015-0103-5&partnerID=40&md5=a2700a3bf1f52b742b190b1577e035ea
dc.subjectData acquisitionen
dc.subjectTurbulent flowen
dc.subjectVelocityen
dc.subjectVelocity distributionen
dc.subjectVelocity measurementen
dc.subjectExperimental analysisen
dc.subjectExperimental investigationsen
dc.subjectHalf-separated beden
dc.subjectOpen channelsen
dc.subjectParticle image velocimetry methodsen
dc.subjectPermeable beden
dc.subjectPorous beden
dc.subjectSpatial temporalsen
dc.subjectGravelen
dc.subjectdata acquisitionen
dc.subjectexperimental studyen
dc.subjectnumerical methoden
dc.subjectopen channel flowen
dc.subjectroughnessen
dc.subjectsimulationen
dc.subjectturbulenceen
dc.subjectturbulent flowen
dc.subjectvelocity profileen
dc.subjectSpringer Baselen
dc.titleThe Different Impact of a Half-Separated Gravel and Vegetated Bed in Open Channelsen
dc.typejournalArticleen


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