VTPSUHM - SCS 24 hour storm with Rational Method? (tough one!) 1

[LHA]

Fellow geniuses:

VTPSUHM has an option which allows hydrographs to be generated using the Rational Method, but with the intensity from SCS 24 hour storm distribution. The Return Rate, Precipitation (in inches) and SCS Rainfall Type are specified...from there, an IDF curve is (apparently) generated. Where does this intensity come from?

I have recieved calculations to review which seem to meet the Ordinance, and I don't want to disallow the method out-of-hand. If its validity can be verified, I will accept it.

Can anyone point me to an external source (not Virginia Tech or Penn State) which will allow me to verify the logic behind, and to spot check these.

Thank you.

--Steve

 

[ALBUD1962]

I know this post is dated but I would contact

http://surveying.wb.psu.edu/psu-surv/tombio.htm

Tom Seybert. He is very helpful.

 

[LHA]

Thank you, I have contact Dr. Seybert.

The issue is no longer relevant to this project (the applicant agreed to use DOT IDFs), but I am still curious.

Remember: The Chinese ideogram for “crisis” is comprised of the characters for “danger” and “opportunity.”
-Steve