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Is there a formula that can calculate rainfall on a gallons-per-square-mile basis?

Asked by elbanditoroso (33170points) August 7th, 2013

Or gallons-per-acre would be fine, as well.

Of course there are rain gauges that show how many inches of rain fell in a one-inch wide container, but that doesn’t easily translate into gallons, much less gallons per square mile.

What I am after is something that will let me calculate and enable me to make a statement like this:

“Torrential rains in Missouri this week came down at a rate of 7000 drops per minute, and deluges St. Thomas county with more than 8 zillion gallons of rain in a 24 hour period”.

Does this sort of formula exist?

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