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Autodesk
Status For Review
Product InfoDrainage
Created by Steve Batchelder
Created on Mar 12, 2026

Allow different C-values (runoff coefficients) for major and minor storms

It would be nice to have an input for different C-values (runoff coefficients) for various storm events. In CO we have different coefficients based on the storm event which contributes to the flow calculations for the Rational Method. Currently you have to make another phase or do a save as and change the values. Having at least a major and minor event which you can select which events those are (i.e. 5-year and 100-year or 10-year and 100-year) would be nice, but having 3-5 events would be ideal.

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