SW6230104_Design Calculations_20230718

Bioretention Treatment Calculations
NRCS Curve Number Method
S=1000/80 — 10 = 2.5
Q = (1 -0.2*2.5) ^2/(1 +0.8*2.5) Q = .08333
NRCS Curve Number Method BUA
S=1000/98 — 10 = 0.20
Q = (1 -0.2*0.2)^2/(1 +0.8*0.2) Q = 0.79
Q = 3,046
NRCS Curve Number Method — remaining area
CN=73
S=1000/73 — 10 = 3.70
Q = (1 -0.2*3.7)^2/(1 +0.8*3.7) Q = 0.017
Q = 301
Qtotal = 3,346