Gallons Of Water Per Square Foot Of Roof

So if they drain 23 million gal.

Gallons of water per square foot of roof.

If your average rainfall was 25 inches year your annual collection potential is 1 120 x 25 28 000 gallons year. Per day it would take just short of 6 days to lower the level by 1 inch. 1 inch of water over a 5000 acre area equals 135 771 500 gallons. Either way you would like to know how much rain has fallen how many gallons have come down from the skies onto your roof yard block or town.

To get an idea how much water the roof of your own house might yield use the rainfall harvest calculator above. For example on a 2 000 square foot roof you can collect 2 000 x 0 56 1 120 gallons inch of rain. Take a guess what is the volume of water that runs off a 1 000 square foot roof during a 1 rain storm. When you look at the numbers it s surprising how much water you can collect every time it rains.

Performing this calculation requires you to also know the depth of the area in which the water is located as you need to have cubic feet to convert to gallons. So a 50 x 20 roof is 600. Understanding how many gallons are within a square foot of water is useful in determining the amount of water required to fill a structure such as a pool or a pond. Take the dimensions of the footprint of your roof and convert them to inches.

Just a half inch of rain falling on a 1 000 square foot roof will yield 300 gallons of water. The answer is about 623 gallons.