Laserfiche WebLink
<br />I <br /> <br /> <br />41 <br /> <br />I <br /> <br /> <br /> <br />I <br />I <br /> <br />I <br /> <br />Extended Detention Pond <br /> Design I (') ~ 0 @ e 0 Moderate <br /> Design 2 . e 0 e ~ 0 Moderate <br />Wet Pond Design 3 . ll) 0 e (') 0 High <br /> Design 4 (') e @ ~ @ 0 Moderate <br /> Design 5 (') e @ @ ll) 0 Moderate <br /> Design 6 . <9 . e ll) 0 High <br />Infiltration Trench <br /> Design 7 (') e e <9 (') ~ Moderate Key <br /> Design 8 . e e ll) . (') High o 0 to 20% Removal <br /> Design 9 . (') <9 . . . High o 20 to 40% Removal <br />InfIltration Basin e 40 to 60% Removal <br /> Design 7 (') e e ~ e 0 Moderate ll) 60 to 80% Removal <br /> Design 8 . e e 0 . <9 High . 80 to 100% Removal <br /> Design 9 . ll) 0 . . . High o Insufficient Knowledg <br />Porous Pavement <br /> Design 7 0 0 e ~ e 0 Moderate <br /> Design 8 . <9 ~ 0 . . High <br /> Design 9 . 0 0 . . . High <br />Water Quality Inlet <br /> Design 10 \) 0 0 0 0 0 Low <br />FIlter Strip <br /> Design II @ 0 0 0 ~ 0 Low <br /> Design 12 . e e 0 . 0 Moderate <br />Grassed Swale <br /> Design 13 0 0 0 0 0 0 Low <br /> Design 14 @ ~ 0 @ 0 0 Low <br />Design 1: FIrst-flush runoffvolurne detained for Design 7: Facility exfitraleS first-flush; 05 inch <br /> 6-12 hours. runoffftmpervious acre. <br />Dt:sign 2: Runoff volume produced by 1.0 inch. Design 8: Facility exfiltratcs one inch runoff volume per <br /> detained 24 hourn. impervious acre. <br />Design 3: As in Design 2. but with shallow mmh in Design 9: Facility exfiltratcs all runoff, up to the 2 YeM <br /> bonom stage. design stonn, <br />Design 4: Penrument pool eqwiJ to 05 inch storage Design 10: 400 cubic feet wet storage per impervious acre. <br /> per imercious acre. Design 11: 20 foot wide turf strip. <br />Design 5: Pernunent pool eqwiJ to 25 (V r); where Design 12: 100 foot wide forested strip, with level spreader. <br /> Vr = mean storm nmoff. Design 13: High slope swales, with no check dams. <br />Design 6: Penrument pool equal to 4.0 (Vr); approx. Design 14: Low gradient swales with check: dams. <br /> 2 weeks retention. <br />Figure 16: Comparative Pollutant Removal Of Urban BMP Designs <br />SourcJ:: Thomas R.. Schueler. COnlTolling Urban Runoff: A Practical Man.u.a.l for Planning aM Designing Urban BMPs. (Merropolitan <br />Washington Council of Govmuncnts. Ju1y~ 1987) p. 26. <br /> <br />I: <br /> <br />I <br /> <br />II <br />I <br /> <br />I <br />I <br /> <br />I <br /> <br />1 <br /> <br />I <br /> <br />r <br /> <br />I <br />