convert Rational C to SCS (NRCS) CN?
convert Rational C to SCS (NRCS) CN?
(OP)
I saw something on this a long time ago. Wondering if anyone has a resource to find equivalent values for the same land use between Rational and SCS runoff coefficients?





RE: convert Rational C to SCS (NRCS) CN?
RE: convert Rational C to SCS (NRCS) CN?
Actually, after I posted, I found what I was looking for in my old textbook. One conversion may be found in, "Introduction to Hydrology" third ed., Viessman, Lewis & Knapp.
RE: convert Rational C to SCS (NRCS) CN?
You might find it usefull to use the forum's search featrures. Using it, I found this thread which pretty much covers your topic:
http://www.eng-tips.com/viewthread.cfm?qid=70645
RE: convert Rational C to SCS (NRCS) CN?
The thread you referred me to contains the same conversion in my old text.
RE: convert Rational C to SCS (NRCS) CN?
A lot of times the C or CN is based on engineering judgement. Some sheds requires a lot of different weighting and averaging to get an appropriate "average" C or CN that is consistent with the intent of the study.