50% PMP 6-hour storm - storm equivalent in Hydrocad

[KarenA]

I have a requirement for spillway design that requires passing 50%PMP in a 6-hour storm event. In Indiana, what would be the equivalent storm event in Hydrocad?

 

[psmart]

There are a number of 6-hour distributions in HydroCAD that might be of interest, but I suspect you're looking for the "Type B" referenced as follows: SCS Type B aka ESH from TR-20 Table 6, TR-60 Fig 2-6, NEH-4 Fig 21.2

Peter Smart
HydroCAD Software

http://www.hydrocad.net

 

[KarenA]

The documentation refers to a NRCS Type B 6-hour PMP hyetograph.

 

[psmart]

That's the rainfall distribution I suggested.


Peter Smart
HydroCAD Software

http://www.hydrocad.net

 

[KarenA]

Thank you!