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  • Establishing stage-discharge relationships in multiple-channelled, ephemeral rivers: a case study of the Diamantina River, Australia

    Author(s)
    Bullard, Joanna E
    Mctainsh, Grant H
    Martin, Paul
    Griffith University Author(s)
    McTainsh, Grant H.
    Year published
    2007
    Metadata
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    Abstract
    The method for deriving a stage-discharge relationship has a significant impact on the shape of the river's rating curve. We compare rating curves for a single gauging station on a mutiple-channelled river in Australia compiled using three different methods - the Urban Runoff and Basin Systems (URBS) rainfall-runoff model, an empirically-based velocity-area method, and the predictive Hydrologic Engineering Centre-River Analysis System (HEC-RAS) computer model. The rainfall-runoff model was found to predict lower discharges for stage heights over 3.5 m than both the empirically-based velocity-area method and the HEC-RAS model. ...
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    The method for deriving a stage-discharge relationship has a significant impact on the shape of the river's rating curve. We compare rating curves for a single gauging station on a mutiple-channelled river in Australia compiled using three different methods - the Urban Runoff and Basin Systems (URBS) rainfall-runoff model, an empirically-based velocity-area method, and the predictive Hydrologic Engineering Centre-River Analysis System (HEC-RAS) computer model. The rainfall-runoff model was found to predict lower discharges for stage heights over 3.5 m than both the empirically-based velocity-area method and the HEC-RAS model. The empirically-based velocity-area model predicts similar discharges to the rainfall-runoff model for stage heights less than 3 m but much higher discharges for larger flood events. The HEC-RAS model predicts higher discharges than both other rating curves at all stage heights probably due to under-estimation of the impact of surface roughness on flow velocity. The three models are discussed with particular reference to their use on multiple-channelled rivers.
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    Journal Title
    Geographical Research
    Volume
    45
    Issue
    3
    Publisher URI
    https://onlinelibrary.wiley.com/doi/10.1111/j.1745-5871.2007.00457.x
    DOI
    https://doi.org/10.1111/j.1745-5871.2007.00457.x
    Publication URI
    http://hdl.handle.net/10072/18820
    Collection
    • Journal articles

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