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The concept of roughness in fluvial hydraulics and its formulation in 1D, 2D and 3D numerical simulation models / Hervé Morvan in Journal of hydraulic research, Vol. 46 N°2 (2008) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 46 N°2 (2008) . - p. 191-208 Titre : The concept of roughness in fluvial hydraulics and its formulation in 1D, 2D and 3D numerical simulation models Titre original : Le concept de rugosité en hydraulique fluviale et sa formulation dans les modèles de simulation numérique 1D, 2D et 3D Type de document : texte imprimé Auteurs : Hervé Morvan, Auteur ; Donald Knight, Auteur ; Nigel Wright, Auteur Article en page(s) : p. 191-208 Note générale : Hydraulique Résumé en Français Langues : Anglais (eng) Mots-clés : Flow  Modeling  Resistance  Rivers  Roughness 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 : This paper gives an overview of the meaning of the term “roughness” in the field of fluvial hydraulics, and how it is often formulated as a “resistance to flow” term in 1D, 2D and 3D numerical models. It looks at how roughness is traditionally characterized in both experimental and numerical fields, and subsequently challenges the definitions that currently exist. In the end, the authors wonder: Is roughness well understood and defined at all? Such a question raises a number of concerns in both research and practice; for example, how does one modeller use the roughness value from an experimental piece of work, or how does a practitioner identify the roughness value of a particular river channel? The authors indicate that roughness may not be uniquely defined, that there may be distinct “experimental” and “numerical” roughness values, and that in each field nuances exist associated with the context in which these values are used. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] The concept of roughness in fluvial hydraulics and its formulation in 1D, 2D and 3D numerical simulation models = Le concept de rugosité en hydraulique fluviale et sa formulation dans les modèles de simulation numérique 1D, 2D et 3D [texte imprimé] / Hervé Morvan, Auteur ; Donald Knight, Auteur ; Nigel Wright, Auteur . - p. 191-208. Hydraulique Résumé en Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 46 N°2 (2008) . - p. 191-208 Mots-clés : Flow  Modeling  Resistance  Rivers  Roughness 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 : This paper gives an overview of the meaning of the term “roughness” in the field of fluvial hydraulics, and how it is often formulated as a “resistance to flow” term in 1D, 2D and 3D numerical models. It looks at how roughness is traditionally characterized in both experimental and numerical fields, and subsequently challenges the definitions that currently exist. In the end, the authors wonder: Is roughness well understood and defined at all? Such a question raises a number of concerns in both research and practice; for example, how does one modeller use the roughness value from an experimental piece of work, or how does a practitioner identify the roughness value of a particular river channel? The authors indicate that roughness may not be uniquely defined, that there may be distinct “experimental” and “numerical” roughness values, and that in each field nuances exist associated with the context in which these values are used. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com