So if you have 2 500 square feet of roof available for water catchment and a single inch of rain falls one day we see that.
2000 sqft roof 1inch of rain how much water.
Rain barrel supplies list.
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.
To find how much rain you can collect in an average rain year multiply this number by the average inches of rain.
36 4 x 46 4 2 000 sq ft your roof catchment area is thus 2 000 square feet.
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.
Rainfall calculator english units how much water falls during a storm.
Even though we live in the arid southwest santa fe receives an average of 14 2 inches over 66 days of rain each year.
So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall.
When you look at the numbers it s surprising how much water you can collect every time it rains.
Use our metric system version.
Since one inch of rainfall provides approximately 600 gallons of water for a 1 000 square foot catchment area and our theoretical house has a 2 000 square foot catchment area twice the area you will multiply 600 gallons by 2.
This calculation assumes a 90 efficiency.
Surprisingly a single quarter acre of land in the city can harvest over 100 000 gallons of water annually.
How much rainwater can i collect from my roof.
For example on a 2 000 square foot roof you can collect 2 000 x 0 56 1 120 gallons inch of rain.
Just multiple the square footage of roof space you have available x 0 6 gallons per square foot per inch of rain and you can see how much water you can collect from each inch of rain that falls.
It is the middle of july in georgia and both you and your tomatoes are wilting in your yard both looking to the sky and hoping for rain.