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Scour and hydraulic jump downstream of block ramps in expanding stilling basins / Pagliara, Stefano in Journal of hydraulic research, Vol. 47 N° 4 (2009) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 47 N° 4 (2009) . - pp. 503-511 Titre : Scour and hydraulic jump downstream of block ramps in expanding stilling basins Titre original : Affouillement et ressaut hydraulique en aval de rampes de blocs dans des bassins d'expansion tranquillisants Type de document : texte imprimé Auteurs : Pagliara, Stefano, Auteur ; Michele Palermo, Auteur ; Iacopo Carnacina, Auteur Article en page(s) : pp. 503-511 Note générale : Hydraulique Résumé en Français Langues : Anglais (eng) Mots-clés : Block  ramp  Hydraulic  jump  Scour  Stilling  basin  Tailwater  level Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The scour process downstream of block ramps is strongly affected by both the stilling basin geometry and the hydraulic conditions. Particular effects include the ramp slope and the geometry of the stilling basin. The aim of this experimental study is to analyze these effects on both the scour mechanism and the hydraulic jump of symmetrically expanding stilling basins, for different hydraulic and geometric conditions. The analysis of the scour phenomenon is fundamental for a correct stilling basin design. The scour hole downstream of a block ramp can have a prominent ecological function as it forms a natural pool for fish. Experiments were conducted for various tailwater levels, ramp slopes and granulometries of the bed material. A qualitative description of the scour hole process is given and simple relationships were derived to predict its main hydraulic and geometrical parameters. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Scour and hydraulic jump downstream of block ramps in expanding stilling basins = Affouillement et ressaut hydraulique en aval de rampes de blocs dans des bassins d'expansion tranquillisants [texte imprimé] / Pagliara, Stefano, Auteur ; Michele Palermo, Auteur ; Iacopo Carnacina, Auteur . - pp. 503-511. Hydraulique Résumé en Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 47 N° 4 (2009) . - pp. 503-511 Mots-clés : Block  ramp  Hydraulic  jump  Scour  Stilling  basin  Tailwater  level Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The scour process downstream of block ramps is strongly affected by both the stilling basin geometry and the hydraulic conditions. Particular effects include the ramp slope and the geometry of the stilling basin. The aim of this experimental study is to analyze these effects on both the scour mechanism and the hydraulic jump of symmetrically expanding stilling basins, for different hydraulic and geometric conditions. The analysis of the scour phenomenon is fundamental for a correct stilling basin design. The scour hole downstream of a block ramp can have a prominent ecological function as it forms a natural pool for fish. Experiments were conducted for various tailwater levels, ramp slopes and granulometries of the bed material. A qualitative description of the scour hole process is given and simple relationships were derived to predict its main hydraulic and geometrical parameters. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com