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?

December 16, 2015- 1:28 pm You do not have enough data to discern anything from what you have posted. What you are trying to do is not easy, and is well outside the scope of this forum. I suggest you read...

Hello, we are working on a previously developed site with existing imperviousness less than 50% (Option 1, case 1). Our engineer has made the calculations for the 1 and 2 year, 24 hr design...

Dear all,
My project is two underground basement parking floors, that are built on the total land area, while the above-grade floors are built on 30% of the total land area....

Hello,

I am fielding a question for our civil engineer. We are trying to determine if the existing conditions (previously developed) are actually hurting us on this credit, and if there's...

Hi,
I have a NC project in Colombia and the Environmental Authority just have IDF curves since 3 years. I don't have information since 1 and 2 years. Can I use the value for 3 years in...

How does LEED SSc6.1 calculate "...

Greetings
Our project is a 30 year old building undergoing a Major Renovation and will be registered as LEED-NC v2009.
In calculating pre- and post-development runoff, do we consider...

Here, by the looks of it, no RATE calculations are required.

Just VOLUME...and only for the 2-year 24hr design storm to boot, meaning:

1) Get the total volume ("Depth") of the 2-...

Folks:

We have a project (existing imperviousness > 50%) where we have calculated that through a combination of green roof, pervious pavers, landscaped open space, and a rainwater...