| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Accounting for Rough Bed Friction Factors of Mud Beds as a Result of Biological Activity in Erosion Experiments
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| Autores: |
Guizien, Katell
Orvain, Francis
Duchene, Jean-claude
Le Hir, Pierre
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| Data: |
2012-11
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| Ano: |
2012
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| Palavras-chave: |
Bed roughness
Friction factor
Mud beds
Biological activity
Erosion experiments
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| 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.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00117/22807/20617.pdf
DOI:10.1061/(ASCE)HY.1943-7900.0000627
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| Editor: |
Asce-amer Soc Civil Engineers
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| Relação: |
http://archimer.ifremer.fr/doc/00117/22807/
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| Formato: |
application/pdf
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| Fonte: |
Journal Of Hydraulic Engineering-asce (0733-9429) (Asce-amer Soc Civil Engineers), 2012-11 , Vol. 138 , N. 11 , P. 979-984
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| Direitos: |
2012 American Society of Civil Engineers.
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