Forum quick links
Discharge rates and run off
NC-2009 SSc6.1:Stormwater Design—Quantity Controlposted by Sean Hogan on
Hi, In simple terms, is there a difference between 'discharge rate' and 'run off'? We are currently assessing our site to determine which case and path to follow.
Option 2: Stream Protection Plan
NC-2009 SSc6.1:Stormwater Design—Quantity Controlposted by Robert Thuston on
I apologize if the requested information is included on this site but I have not seen it to this point. Can anyone give me a definition of what constitutes a stream channel?
Waiver for Quantity Requirement
NC-2009 SSc6.1:Stormwater Design—Quantity Controlposted by Tim Setala on
We have a project where infiltration is not possible as the soils are D type.
pre-development / post-development
NC-2009 SSc6.1:Stormwater Design—Quantity Controlposted by Doreen Kruschina on
Sorry, might be a stupid question: in our case the pre-development is a demolished building complex. Do we calculate the post-development against the previous development or the undeveloped condit
n/a
NC-2009 SSc6.1:Stormwater Design—Quantity Controlposted by Marco Valerio Ceccotti on
Hi All. This is just a suggestion. To achieving this credit the pre-development condition is no more the "existing site" we were talking about in v2009, but is now(LEED v4) the "natural land cove
Municipality Managed System
NC-2009 SSc6.1:Stormwater Design—Quantity Controlposted by Chen Shalita on
Hello, For our project we are interested in checking the feasibility of control measures outside the LEED project boundary. The municipality where the project is located has a stormwater managem
runoff coefficient
NC-2009 SSc6.1:Stormwater Design—Quantity Controlposted by Eric Yao on
what the value of runoff coefficient for gravel area (2% gradient)?
Drainage Pipe Capacity
NC-2009 SSc6.1:Stormwater Design—Quantity Controlposted by Jatuwat Varodompun on
Can we count the capacity of underground drainage pipes as the retention capacity? The pipe capacity will then add to the stormwater retention capacity.
Peak discharge/flow rate
NC-2009 SSc6.1:Stormwater Design—Quantity Controlposted by hana manai on
Which formula do you use to calculate peak flow rate (1 and 2-year, 24hours). I am using NRCS (SCS) TR-55 Graphical Discharge Method. Is that recommanded?