1. First Flush Volume
2nd Story Roof 1st Story Roof
Area 13,800.00 ft^2 Area 9,200.00 ft^2
Gallons Gallons
Diverted 207.00 gals Diverted 138.00 gals
*Note for every 1000 ft^2 of area 15 galllons needs to be diverted.
Storage Capacity
2nd Story Roof 1st Story Roof
Depth of Depth of
Rain 0.083 ft Rain 0.083 ft
Area 13,800.00 ft^2 Area 9,200.00 ft^2
Volume 916.32 ft^3 Volume 305.44 ft^3
Volume 6,647.99 gallons Volume 2,147.00 gallons
Total
Volume 8,794.99 gallons
Total
Volume 1,175.64 ft^3
*In determining the volume coefficient of .8 was used
*1st story roof coefficient of .5 was used in calculating the volume
due to 50% of water to be captured by the garden roof.