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Provedor de dados:  ArchiMer
País:  France
Título:  Accounting for Rough Bed Friction Factors of Mud Beds as a Result of Biological Activity in Erosion Experiments
Autores:  Guizien, Katell
Orvain, Francis
Duchene, Jean-claude
Le Hir, Pierre
Data:  2012-11
Ano:  2012
Palavras-chave:  Bed roughness
Friction factor
Mud beds
Biological activity
Erosion experiments
Resumo:  The average bed shear stress and bed friction factor of samples with any roughness was derived from the head loss between upstream and downstream of a test section in an erosion tunnel. The method was validated in both hydraulically smooth (plexiglass; Reynolds number less than 25,000) and rough regimes (calibrated particles with known roughness). As a first step toward using this method on natural sediment, this method was tested with experimental mesocosms assembled from field collected materials (sieved sediments; diatoms). Bed shear stress measurement precision was high enough in the experiments to detect a positive significant relationship between bed friction factor and core roughness. The observed bed friction factor increase could be related to diatom growth but not to diatoms biomass. DOI: 10.1061/(ASCE)HY.1943-7900.0000627. (C) 2012 American Society of Civil Engineers.
Tipo:  Text
Idioma:  Inglês

Editor:  Asce-amer Soc Civil Engineers
Formato:  application/pdf
Fonte:  Journal Of Hydraulic Engineering-asce (0733-9429) (Asce-amer Soc Civil Engineers), 2012-11 , Vol. 138 , N. 11 , P. 979-984
Direitos:  2012 American Society of Civil Engineers.

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