What rainfall method to use with NRCC rainfall?
What rainfall method to use with NRCC rainfall?
(OP)
A local town is proposing regulations that will require stornwater management facilities to be designed to handle the "extreme precipitation" shown in the "Atlas of Extreme Precipitation in the Northeastern United States" published by the Northeast Regional Climate Center (at Cornell).
Since I will not be using TP-40, what rainfall distribution should I use? Is this explained in the Atlas? or does it use a new distribution model?
Patrick
Since I will not be using TP-40, what rainfall distribution should I use? Is this explained in the Atlas? or does it use a new distribution model?
Patrick





RE: What rainfall method to use with NRCC rainfall?
2. See if it tells you what distribution to use.
If not, ask the agency proposing the regulation to tell you. Better yet, get them to give you an example of the calculations they expect to see.
3. Did you mean "NRCS" rather than "NRCC"?
good luck
RE: What rainfall method to use with NRCC rainfall?
http://met-www.cit.cornell.edu/
I was reading from the proposed regulation when I posted my question:
"Stormwater facilities shall be designed to handle
the extreme precipitation as shown in the "Atlas of
Extreme Precipitation in the Northeastern United
States" published by the Northeast Regional Climate
Center,"
and yes, I ordered the refernced publication.
Presumably the atlas (ala TP-40) will show the extreme rainfall for a given locale for a given time period, 24-hours, 12 hours, 1 hour, etc.
Do you know whether it will use an NRCS-type distribution curve (curves are predefined in HydroCAD: Type I, Type II, Type IIA, Type III), or will we have to create new distribution curves for each event. If the latter, I must allow time in my proposal for these additional services.
Patrick
RE: What rainfall method to use with NRCC rainfall?
An example can answer these questions most efficiently. Ask for one. Indeed, insist on one.
good luck
RE: What rainfall method to use with NRCC rainfall?