SW6230603_Design Calculations_20240816 (8)

Aberdeen US 15-501 DG
Infiltration Basin
Drainage Area: 66,552 sf
1.53 ac
Impervious Area: 37,751 sf
0.87 ac
%Impervious: 56.7%
1 inch Storm Event:
Rv=0.05+0.009 I
Rv=runoff coefficient
I=percent impervious
Rv= 0.5605
For volume that must be controlled:
Volume=3,63 0*Rd*Rv*A
Volume required: 3,109 cf
Volume provided: 3,164 cf
Recommended Surface Area: 10,547 sf
Factor of safety: 2
Design volume: 3,164 cf
Infiltration rate: 0.1 in/hr
Max dewater time 72 hrs
Surface area provided: 11,166 sf
DV *12
SA = FS * K ' T
where. SA = required minimum surface area of infiltration system(ft`)
FS = factor of safety(minimum of 2 is recommended)
DV = design volume(ft')
K = hydraulic conductivity of soil(inihr)
T = maximum dewatering time(72 hours)