Rainwater management

SAMY Chamy

Enginneer

T&T Green

LEEDuser Basic Member

9 thumbs up

January 2, 2018

Dear Concern:-

we are working in a major renovation project so it is difficult to manage the runoff however we are reduce the runoff volume compared to pre-development by GI & LID

we have following queries all about option - 2

1.The runoff after renovation can not increase compare with runoff before renovation, is it enough to get this credit (Landscape area increased so runoff in post development reduce by 3% compare with pre development)

2.It is already have maximum landscape, GI & LID techniques so it is difficult to manage the entire runoff

3.is it correct way to compare pre-development and post development for achieve this credit

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Michael DeVuono

Regional Stormwater Leader

Arcadis North America

LEEDuser Expert

144 thumbs up

Tue, 01/02/2018 - 16:16

Option 2 requires you to manage the difference between the natural condition hydrology (pre) and the post development hydrology. FYI....pre-development means before the site was ever developed, not before you developed it. You need to run a continuous simulation model for this option (EPA SWMM, PCSWMM, etc)

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