Can I do TR-55 studies with HydroCAD?
Yes. Although HydroCAD does not have a specific TR-55 option, it is appropriate for any study that calls for TR-55. When calculating the Tc, HydroCAD offers all the standard TR-55 procedures, plus several others. For runoff, use the TR-20 runoff option, which provides greater accuracy than the TR-55 “Tabular Method.” (The Tabular Method is designed to approximate TR-20 results, upon which it is based. For details see Understanding Hydrology and the TR-55 background information.
