Runoff Produced Per Square Foot Of Roof

Here you can easily find how much rainwater you can collect from you roof how much you need to remove from a courtyard or how much runoff you can expect from an area of land.

Runoff produced per square foot of roof.

To work out the surface area simply multiply the length in metres by width for square or rectangular roofs. 1 of rain on 1 000 sf roof will yield 623 gallons roof area m2 x precipitation amount mm amount collected liters other water conservation calculators. 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. 0 inches per hour data source.

If you get about 10 inches of rain over the course of the spring and summer an average 1 360 square foot roof would yield 8 160 gallons of rainwater. Because of the variables pinning down exact numbers is tough. Use our metric system version. Measure along the length of the house or building and along the width of the house or building in feet.

Rainfall calculator english units how much water falls during a storm. 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. Although this calculation is simple in principle the units can make it a headache. Roof area ft2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember.

Multiply the two figures together to obtain the square footage of your roof. The answer is about 623 gallons. The number of feet multiplied by 144 equals inches. So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall.

0 gallons per minute gpm 0 cubic feet per second cfs peak runoff volume. 216 000 square inches multiplied by 2 inches of rain yields 432 000 cubic inches of rain. Take the dimensions of the footprint of your roof and convert them to inches. You have to admit that whether you re in a drought situation or not it s hard to pass up that much of a free thing.

0 gallons 0 cubic feet. Automatic overflow control directs water back to downspout when barrel is full. So how many square feet of your roof will your pv solar system cover. Drainage pipe required minimum diameter.

Since rainwater is collected from rooftops you will need to work out the total surface area of roof s that will be used to catch rainwater. In this example we ll assume 2 inches of rain per hour. Calculate surface area of your roof. But at 20 watts per square foot a system rated to produce 2 kilowatts would cover roughly 150 square feet while a 3kw system would take up about 225 square feet.

For example if you have a roof that measures 1 500 square feet that equals 216 000 square inches. 1 500 x 144 216 000 multiply those 216 000 square inches by the rainfall.