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dc.contributor.authorFerrer Boix, Carles
dc.contributor.authorHassan, Marwan A.
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d’Enginyeria Gràfica i de Disseny
dc.identifier.citationFerrer-Boix, C.; Hassan, M.A. Influence of the sediment supply texture on morphological adjustments in gravel-bed rivers. "Water resources research", Novembre 2014, vol. 50, núm. 11, p. 8868-8890.
dc.description.abstractThe role played by the texture of the sediment supply on channel bed adjustments in gravel-bed rivers is poorly understood. To address this issue, an experimental campaign has been designed. Flume experiments lasting 96 h in a 9 m long, 0.60 m wide have been performed with different sand-gravel mixtures as feed textures. The response of the surface texture has been found to be highly dependent on the grain size distribution of the feed. When the feed texture included gravel, the finest fractions of the sediment supply infiltrate beneath the surface. Conversely, sand remains on the surface when the feed texture lacks gravel. This different textural response becomes obscured when water discharge increases. Further, the sediment transport rate approaches the feed rate differently depending on the content of gravel in the feed texture. When a small proportion of gravel is part of the feed texture, bed load transport rate asymptotically approaches the feed rate. However, when a significant fraction of gravel is part of the feed grain size distribution, bed load transport rate approaches the feed rate by following an oscillatory path. These findings have been verified in terms of a one-dimensional numerical model. This modeling reveals that the higher the differences in mobility among the grain sizes contained in the feed texture, the more evident is the nonasymptotic transient trend toward equilibrium.
dc.format.extent23 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geologia::Hidrologia
dc.subject.otherFluvial geomorphology
dc.subject.otherSediment transport
dc.subject.otherRiver channels
dc.titleInfluence of the sediment supply texture on morphological adjustments in gravel-bed rivers
dc.subject.lemacCursos d'aigua
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorFerrer-Boix, C.; Hassan, M. A.
local.citation.publicationNameWater resources research

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