Kubota of Fayetteville - 1355-Volumes Required

Kubota of Fayetteville Required Storm Volume

Pond #1

Drainage Area:

4.69 acres 204,297 sf

Impervious Area: 170,668 sf (3.92 ac)
% Impervious: 84%

1 inch Storm Event:

Rv = 0.05+0.009 I
Rv = runoff coefficient
I= percent impervious

Rv=0.05+0.009*84%
= 0.81

For volume that must be controlled:
Volume=3,630*Rd*Rv*A

Volume = 3,630*(1 inch)*(0.81)*4.69 acres = 13,790 cf

SA/DA ratio is 3.05 for a depth of 3.0 feet

Required surface area = 4.69 ac * (0.0305) = 0.143045 ac or 6,231 sf

Surface area provided = 11,893 sf