Hallo, I have documented SSc6.1 and SSc6.2 for almost 15 projects with a 100% success rate.
I am documenting NC-v4 Rainwater Management for the first time and I am a little bit confused about how calculations should be carried out. I've read the v4 Reference Guide and none of the formulas in it are useful for the purposes of my case.
The Reference Guide v4 offers a great example for calculating bioretention areas but it does not show how to calculate common strategies such as stormwater tanks.
Could someone point out an example on how these calculations should be made? Please uploaded it to the "credit resources" or "documentation toolkit" tab.
Thanks,
Michael DeVuono
Regional Stormwater LeaderArcadis North America
LEEDuser Expert
186 thumbs up
November 21, 2014 - 7:34 am
Hi Gustavo, the methodology for calculating stormwater runoff is the same as with previous iterations of LEED, you are simply using a different design storm with v4 (the 95th or 98th percentile, as opposed to 1- and 2-year).
Suzanne Johnson
Design ManagerHensel Phelps
November 21, 2014 - 8:24 am
A teammate has suggested that is it possible to use NC v4 Rainwater Management as an IDc in addition to NC v3 SSc6.1 and 6.2. Has anyone had experience with this approach and is it acceptable to the GBCI/USGBC?
RETIRED
LEEDuser Expert
623 thumbs up
November 21, 2014 - 8:30 am
The comments under the article - Use v4 credits on your v2009 project - http://www.usgbc.org/articles/use-v4-credits-your-v2009-project - has a discussion about innovation credits by Batya Metalitz. She suggests looking at the Pilot Credit Library - http://www.usgbc.org/pilotcredits - and the Innovation Catalog - http://www.usgbc.org/credits/new-construction/v2009/innovation-catalog. I don't see this credit listed there.
Gustavo De las Heras Izquierdo
LEED Expert181 thumbs up
November 21, 2014 - 11:16 am
Thanks Michael!
I guess v4 requires to treat ALL the runoff for the post-development scenario. Am I right?
Michael DeVuono
Regional Stormwater LeaderArcadis North America
LEEDuser Expert
186 thumbs up
July 23, 2015 - 8:13 am
Yes Gustavo, that is correct. You need to run the 95, 98 (or 85th) percentile storms across the developed area and generate a runoff hydrograph. This will be your target for WQ.