Welcome to the RAS Solution › Forums › HEC-RAS Help › Tidal Culvert

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  • December 13, 2016 at 11:01 pm #6299
    waterfall
    Participant

    I am using RAS to model a culvert (unsteady) and keep getting this error message. My steady flow runs work, so the culvert geometry is set OK.

    ***** Error! Extrapolated above/beyond Rating Curve (Bridge/Culvert/etc.) *****

    At River Crescent Reach Alignment – exis R.S. 385

    December 14, 2016 at 4:10 am #10294
    cameron
    Participant

    Unsteady is totally different than Steady modeling. Did you set the Htab parameters correctly, choose the correct computational interval, are the ineffectives correct for low flows? From the figure, it looks like the culvert length is far longer than the width of the road, is this correct?

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