PHMS Parking Lot Re-Design Project

Use this calculator to estimate the amount of runoff from a certain sized area with a certain type of vegetation for a given rain event. Soil Type Definition

AREA(sq ft):
Storm Event Type
1.0" 1.5" 2-yr(3.27") 5-yr(4.09") 10-yr(4.78") 50-yr(6.61") 100-yr(7.5")
Vegetation Cover Type
Impervious Grass Shrub Mature Woodland
Soil Type
Type B Type C
Estimated Runoff(gallons):