Chapter 7

Chapter 7. Hydrologic sizing criteria for stormwater Treatment Practices Volume 1I: Design Chapter 7 Hydrologic sizing criteria for stormwater Treatment Practices Introduction ..7-2. criteria Applicability ..7-2. criteria Pollutant Water Quality Volume (WQV)..7-4. Water Quality Flow (WQF)..7-5. Groundwater Recharge and Runoff Volume Reduction ..7-5. Groundwater Recharge Volume (GRV) ..7-6. Runoff Capture Volume (RCV)..7-7. Peak Flow Stream Channel Conveyance Peak Runoff Attenuation ..7-9. Emergency Outlet sizing ..7-10. Downstream sizing Example ..7-10. 2004 connecticut stormwater Quality Manual 7- 1. The sizing approach described in this Chapter is intended to manage the full spectrum of storm flows and their associated water quality and quan- tity impacts. These range from small, frequent storms that are responsible for a majority of the annual runoff volume and pollutant loads to large, infrequent events which are responsible for nuisance and catastrophic flooding.

7-4 2004 Connecticut Stormwater Quality Manual Some of the sizing criteria presented in this chap-ter may not be practical to meet due to space limitations, soil conditions, and other site constraints

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