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
RUNOFF CALCULATOR
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):