This is a follow video to http://www.youtube.com/watch?v=ljiTNRiLh-o This amazing shape was created by nature, actually 3mil plastic and gravity. 22 sq ft collection area 22 x 144 (inches) =3168 sq inches x 1 inch of rain = 3168 sq inches of rain. 1 US Gallon = 231 sq inches of water, 3168 divided by 231 = 13.72 gallons per inch of rain. 14 inches of rain over the few day period = 14 x 13.72= 192 gallons. 192 gallons x 8.3 (pounds of a gallon of water) = 1593 pounds. Since it developed a hole before I could measure, I went with the safe guess of 70 gallons. 192 is hard to believe.
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