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FAQs about SSc6.1 :

Why do the requirements focus on 1-year and 2-year, 24-hour storms?

Why include the 1-year storm in the credit requirements? Won't management practices for the 2-year storm be effective?

How can green roofs count as a stormwater control measure?

How can I achieve compliance if my project's stormwater control measures are outside the LEED project boundary?

I have 100-year data—how do I convert to 2-year?

Is it an acceptable strategy to capture the rainwater into tanks and discharge it into the public sewers after the rainstorm reducing the peak discharge?

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What performance threshold do I need to achieve for an Exemplary Performance point?

The calculations for this credit are always a headache! While our projects are usually awarded the credit, the equations in the LEED Reference Guide are helpful mostly for sizing a reservoir or cistern, but don't help you get to the final results. Does US

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NC-2009 SSc6.1:Stormwater Design—Quantity Control

run off coefficient

Jin Park

associate

Samoo Architects & Engineers

LEEDuser Basic Member

1 thumbs up

March 21, 2014

Hi My project site is composed of sand,gravel. How do I define the run off coefficient? Where can I get it? I'm not experienced enough to work LEED project. Might be a poor question..sorry.

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Michael DeVuono

Regional Stormwater Leader

Arcadis North America

LEEDuser Expert

144 thumbs up

Fri, 03/21/2014 - 12:19

Curve numbers (CN) are obtained from TR-55

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