Unified Stormwater Sizing Criteria - Maryland

where: WQv = water quality volume (in acre-feet) Rv = 0.05 + 0.009(I) where I is percent impervious cover A = area in acres∗ Treatment of the WQv shall be provided at all developments where stormwater management is required. A minimum WQ v of 0.2 inches per acre shall be met at sites or in drainage areas that have less than 15% impervious cover.

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mde.maryland.gov

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mde.maryland.gov

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mde.maryland.gov

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mde.maryland.gov

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mde.maryland.gov

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mde.maryland.gov

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mde.maryland.gov

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www.epa.gov

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www3.epa.gov

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