Accounting for Rough Bed Friction Factors of Mud Beds as a Result of Biological Activity in Erosion Experiments
| Type | Article | ||||||||||||
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| Date | 2012-11 | ||||||||||||
| Language | English | ||||||||||||
| Author(s) | Guizien Katell1, Orvain Francis2, Duchene Jean-Claude3, Le Hir Pierre4 | ||||||||||||
| Affiliation(s) | 1 : Univ Paris 06, Observ Oceanol, LECOB, CNRS,FRE3350, F-66650 Banyuls Sur Mer, France. 2 : Univ Caen, Lab Physiol & Ecophysiol Mollusques Marins PE2M, F-14032 Caen, France. 3 : Univ Bordeaux, CNRS, UMR EPOC 5805, F-33405 Talence, France. 4 : IFREMER, Ctr Brest, F-29280 Plouzane, France. |
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| Source | Journal Of Hydraulic Engineering-asce (0733-9429) (Asce-amer Soc Civil Engineers), 2012-11 , Vol. 138 , N. 11 , P. 979-984 | ||||||||||||
| DOI | 10.1061/(ASCE)HY.1943-7900.0000627 | ||||||||||||
| WOS© Times Cited | 8 | ||||||||||||
| Keyword(s) | Bed roughness, Friction factor, Mud beds, Biological activity, Erosion experiments | ||||||||||||
| Abstract | 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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