Flume investigations into the influence of shear stress history on a graded sediment bed

Heather Monteith, Gareth Pender

    Research output: Contribution to journalArticle

    21 Citations (Scopus)

    Abstract

    [1] A series of flume-based experiments was undertaken to investigate the effect of below-threshold antecedent flow conditions on the stability of a graded sediment bed (D16 =1.8 mm, D50 = 4.8 mm, D 84 = 7.8 mm, and sg = 2.08). The experiments revealed that stability is dependent not only on the applied shear stress of the antecedent flow (1.46, 2.08, 2.19, 2.41, and 2.63 N m-2) but also on its duration (0, 15, 30, 60, 1440 and 5760 min). A new stability diagram has been developed to illustrate stress history effects for the graded substrates and hydraulic conditions used in the investigation. The diagram has implications for flume-based experimental practice, the prediction of sediment transport rates, and sediment management in river restoration. Copyright 2005 by the American Geophysical Union.

    Original languageEnglish
    Article numberW12401
    Pages (from-to)1-7
    Number of pages7
    JournalWater Resources Research
    Volume41
    Issue number12
    DOIs
    Publication statusPublished - Dec 2005

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