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Small-scale laboratory dam-break waves on movable beds

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Spinewine, Benoît [UCL] Zech, Yves [UCL]

This paper documents a series of small-scale laboratory experiments of dam-break waves propagating over loose granular beds, realised in a dedicated flume equipped with a fast downward-moving gate. The flood wave generates intense geomorphic action as bed sediments are eroded and entrained by the flow. Two distinct bed materials, sand and Polyvinyl Chloride (PVC), and a range of initial bed configurations are explored. The sediment bed is either flat or features an upward or downward discontinuity of level across the gate. The case of an initial non-zero water depth downstream is also investigated. The flow is imaged through the sidewalls with fast digital cameras. Imaging techniques are used to identify characteristic flow regions and to derive full velocity fields by tracking the movements of individual bed sediments as well as neutrally-buoyant tracers. The data set described in the paper is provided in digital form in the electronic supplement to this special issue.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2007
Language Anglais
Journal information "Journal of Hydraulic Research" - Vol. 45, p. 73-86 (2007)
Peer reviewed yes
Publisher Int Assn Hydraulic Research (Madrid)
issn 0022-1686
Publication status Publié
Affiliation UCL - FSA/AUCE - Département d'architecture, d'urbanisme et de génie civil environnemental
Keywords dam-break ; geomorphic floods ; laboratory experiments ; imaging methods ; movable bed
Links
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Bibliographic reference Spinewine, Benoît ; Zech, Yves. Small-scale laboratory dam-break waves on movable beds. In: Journal of Hydraulic Research, Vol. 45, p. 73-86 (2007)
Permanent URL http://hdl.handle.net/2078.1/37576