HydroCad

From HydroCAD web site:

HydroCAD-7 is a Computer Aided Design tool used by Civil Engineers for modeling stormwater runoff. HydroCAD provides a wide range of commonly used drainage calculations including:

• SCS, NRCS, SBUH runoff hydrographs
• Rational Method with automatic IDF curves
• Hydrograph routing through ponds & reaches
• Coupled ponds with automatic tailwater
• Automatic hydraulics and culvert calculations
• Automatic pond storage calculations, including embedded storage chambers
• Easy management of multiple rainfall events

HydroCAD is ideal for studies using the TR-20, TR-55, or SBUH methods. HydroCAD provides a wide range of standard H&H techniques in an easy-to-use graphical form, managed by the on-screen routing diagram we pioneered in 1986.

For more information see HydroCAD web site.