Gallons Of Water On Roof

Rain barrel supplies list.

Gallons of water on roof.

Convert the amount of rain from cubic inches into gallons. Rainwater can be collected from the roofs using the rain water harvesting method. 1 inch of rainfall in an hour will cover 1 sq ft. 1 of rain on 1 000 sf roof will yield 623 gallons roof area m 2 x precipitation amount mm amount collected liters other water conservation calculators.

Or maybe a low pressure cell has been napping overhead and your arm is hurting from holding that umbrella while you watch your basement fill up with water. Converting this to gallons per minute per square foot gpm ft 2. There are 231 cubic inches of water in a gallon so using our example above divide cubic inches by 231 and you have a total runoff of approximately 1870 gallons of water or 432 000 231 1870 129. When you look at the numbers it s surprising how much water you can collect every time it rains.

Required roof drainage flow rate in gallons per minute 0 0104 x rainfall rate x roof area where rainfall rate is expressed in inches per hour and roof area is given in square feet. Just a half inch of rain falling on a 1 000 square foot roof will yield 300 gallons of water. To a depth of 1 in 1 hour. A typical outdoor trash can holds 32 gallons.

Rainwater collection calculator in 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. In this example 600 x 240 x 1 144 000 cubic inches of water divide by 231 to get the number of gallons because 1 gallon 231 cubic inches. A service by the american water works association.

If you capture the rainfall runoff from a storm that just produces 1 10th of an inch of rain onto a 20 by 30 foot roof you end up with a full 32 gallon container full of water with 5 gallons left over. Easy formula to remember. If your average rainfall was 25 inches year your annual collection potential is 1 120 x 25 28 000 gallons year. To get an idea how much water the roof of your own house might yield use the rainfall harvest calculator above.

Can you get enough water out of the gutter to make it worthwhile. So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall. Take the dimensions of the footprint of your roof and convert them to inches. An online drip calculator that calculates the amount of waste from your leaky faucets.