# How many gallons of water does it rain?

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## How many gallons of water is in a rainstorm?

A 1-inch rainstorm deposits 27,154 gallons on one acre, so during this storm Atlanta receives 2.28 billion gallons of water. In this era of water conservation, many homeowners are putting “rain barrels” around their homes to collect rainfall runoff.

## How much water is in an inch of rain?

Rainfall amount is described as the depth of water reaching the ground, typically in inches or millimeters (25 mm equals one inch). An inch of rain is exactly that, water that is one inch deep. One inch of rainfall equals 4.7 gallons of water per square yard or 22,650 gallons of water per acre!

## How many gallons is 40 inches of rain?

Amount of Rain Falling on Your Property

If you own a single acre of property, that 40 inches of rain means your property receives over 1 million gallons of rain per year. That’s right.

## How many raindrops are in a storm?

As the 7.6mm were only a lower bound, we can say that there are at least 200,000 drops per square meter and hour in a heavy rain, but typically a lot more (as in, several millions).

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## How much water is in snow?

There is a general rule of thumb that says the perfectly typical snowfall will have a snow-to-liquid ratio of 10 to 1, meaning that 10 inches/cm of snow will yield one inch/cm of water.

## What happens to rainwater once it falls on the earth?

What happens to rain after it falls? Rainwater, or snow melt, either soaks into the ground to become groundwater, evaporates, or flows over the surface of the land. The water that flows over the ground is called stormwater or runoff.

## How many gallons run off a roof?

Just a half inch of rain falling on a 1,000-square-foot roof will yield 300 gallons of water. To get an idea how much water the roof of your own house might yield, use the Rainfall Harvest Calculator, above.

## Is 1 inch of rain in a day a lot?

One (1.00) inch of rain – A light moderate rain never reaches this amount, heavy rain for several hours (2-5 hours). There would be deep standing water for long periods of time.

## How many gallons of water does my roof use?

To find how much rain you can collect in an average rain year multiply this number by the average inches of rain. For example, on a 2,000 square foot roof, you can collect 2,000 x 0.56 = 1,120 gallons/inch of rain.