Storm Water Retention Sizing

Calculate required storm water retention volume for site development.

Total impervious area.
sq ft
Rainfall intensity for design storm.
inches
0.9 (pavement), 0.5 (landscaping), 0.7 (mixed).

Results

Retention Volume-cubic feet
Volume in Gallons-gallons
Volume in Acre-Feet-ac-ft
References: Based on rational method and local storm water management requirements