SW6230705_Design Calculations_20240304 (18)

SERENTIY
SCM#13
Drainage Area: 978,807 sf
22.47 ac
Impervious Area: 483,779 sf
11.11 ac
%Impervious: 49.4%
1 inch Storm Event:
Rv=0.05+0.009 I
Rv=runoff coefficient
I=percent impervious
Rv= 0.4948
For volume that must be controlled:
Volume=3,630*Rd*Rv*A
Volume required: 40,362 cf
Volume provided: 46650 cf
Average depth: 4.1 ft
SA/DA ratio 1.39
Required surface area: 13605 sf
Surface area provided: 16644 sf