As part of NYC's blue roof requirement, roofs must provide 24 hour detention detention for the 2-yr design storm and an equivalent peak runoff rate equal to a curve # of approx 50 for projects disc

Can you tell me how to calculate for multiple draingage sites, i have Three on this particular project. The TC is based on the length and travel and the slope towards the discharge point .

Hi, I'm currently doing a project in Indonesia and having trouble to find the 2-year 24-hour design storm data.

Hello When following the ACP, the LEED manual states that attenuation must be undertaken through Low Impact Development (LID) and green infrastructure strategies.

The data I have to work with for filling this credit out are pre- and post-development calculations for a 100 year storm with a duration of 1 hour.

Could you please give me an advice regarding question 1?

Hi Everyone, A project I'm working on is factory on a rural setting. All roads and parking lots are gravel. Does this account as pervious paving?

I am trying to document a project under option 2 for this credit for a zero lot line project. Does anyone know what objective data compliance for this option is based on?

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. Should I