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LEED BD+C: Core and Shell | v3 - LEED India 2011

Stormwater design - quantity control

SSc6.1 | Possible 1 point

Intent

To limit disruption of natural hydrology by reducing impervious cover, increasing on-site infiltration, reducing or eliminating pollution from stormwater runoff and eliminating contaminants.

Requirements

CASE 1. Sites with Existing Imperviousness 50% or Less

Implement a stormwater management plan that prevents the post-development peak discharge quantity from exceeding the predevelopment discharge quantity calculated based upon a 24-hour rainfall that is equal to 30% of the average rainfall for the month with the highest average rainfall.

CASE 2. Sites with Existing Imperviousness Greater Than 50%

Implement a stormwater management plan that results in a 25% decrease in the volume of stormwater runoff calculated based upon a 24-hour rainfall that is equal to 30% of the average rainfall for the month with the highest average rainfall.

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