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Rational vs SBUH Methods

Rational vs SBUH Methods

Rational vs SBUH Methods

Modelled a pipe system using the rational method and by the use of a spreadsheet. Pipe system discharges to a pond. Is it possible to use the rational method discharge data into the pond and model the pond in Hydrocad?

RE: Rational vs SBUH Methods

You could use a link to manually enter an external hydrograph, but it would be easier to do the runoff generation in HydroCAD and have everything together.

If you use a link, remember that you need a complete hydrograph in order to do a pond routing. Just having the peak flow from your spreadsheet is not sufficient. If you're modeling a pond you really shouldn't be using the Rational Method anyway. For details please see www.hydrocad.net/rational.htm

Peter Smart
HydroCAD Software

RE: Rational vs SBUH Methods

Thanks for the response. How well does Hydrocad perform in pipe routing? I have only used it for attentuation and basin analysis. I have never used it for pipe design.

RE: Rational vs SBUH Methods

HydroCAD can certainly be used for modeling closed storm sewers. Just remember that it's a hydrograph model, as opposed to the steady-state calculation you probably did with your spreadsheet. For details please see www.hydrocad.net/sewers.htm

Peter Smart
HydroCAD Software

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