How much is a half an inch of rain?

1/2 (0.5) of an inch of rain – A light rain never reaches this amount, moderate rain for 1-2 hours or heavy rain for 30-45 minutes. There would be deep standing water and they would last for long periods of time.

How do you calculate rainfall runoff volume?

To calculate the runoff from any given rainfall:

1. Take the dimensions of the footprint of your roof and convert them to inches. (So, a 50′ x 20′ roof is 600″ x 240″.)
2. Multiply the roof dimensions by the number of inches of rainfall. (In this example, 600″ x 240″ x 1″ = 144,000 cubic inches of water.)

How much water is in an inch of rain per square foot?

Every square foot of roof space collects . 6 gallons of water in a 1 inch rainfall.

How many gallons is a half inch of rain?

Just a half inch of rain falling on a 1,000-square-foot roof will yield 300 gallons of water.

How do you calculate storm water flow?

The storm water quantity is determined by the rational formula. Where Q = quantity of storm-water in m3/sc. ADVERTISEMENTS: i = intensity of rainfall in mm/hour.

How do you calculate rain per square foot?

So all you need to do is some simple math. Determine the square footage of the area that’s connected to your rain barrel and multiply it by 0.6, ( sq. feet x 0.6 = gallons). How much rain you can collect off your roof is determined by how large your system is and how much rainfall you have in your area.

How many inches of rain are in an acre?

An Inch of Rain Equals. An acre of ground contains 43,560 square feet. Consequently, a rainfall of 1 inch over 1 acre of ground could mean a total of 6,272,640 cubic inches of water. This is the equivalent of 3,630 cubic feet. As a cubic foot of pure water weighs about 62.4 pounds, it follows that the weight of a uniform coating of 1 inch…

How do you calculate the area of a rectangular field?

Each area calculator determines the area of rectangular, triangular, circular and trapezoidal fields. Learn more about the units used on this page. These Calculators use the following formulas to determine the field area. = Area of the field (sq. ft) = Area of the field (sq. ft)

How much does an inch of rain weigh?

An Inch of Rain Equals. This is the equivalent of 3,630 cubic feet. As a cubic foot of pure water weighs about 62.4 pounds, it follows that the weight of a uniform coating of 1 inch of rain over 1 acre of surface would be 226,512 pounds or about 113 short tons.The weight of 1 U.S. gallon of pure water is about 8.345 pounds.

How do you calculate collectable rainwater from the roof?

The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area. Rainwater can be collected from the roofs using the rain water harvesting method. The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area.