How much rain can i collect from my roof? - greywater action, For example, on a 2,000 square foot roof, you can collect 2,000 x 0.56 = 1,120 gallons/inch of rain. if your average rainfall was 25 inches/year, your annual collection potential is 1,120 x 25= 28,000 gallons/year..
Green roof
water retention, If a green roof has a maximum capacity of 80 l/m 2 (2 gallons per square foot) of retention, that means that when it has absorbed 80l of water, every drop beyond that runs off. the speed of runoff may be highly variable, but retention is black and white: retained or not..
Michael Heath-Caldwell M.Arch - 1949 Diary â€" Rev Capt. C.H
Michael Heath-Caldwell M.Arch - 1949 Diary â€" Rev Capt. C.H
What is a water storage tank and how does it work?, From a small, 5-gallon reverse osmosis tank stored neatly under your sink to a towering 120-gallon well pressure tank, water storage tanks are an integral part of many household water systems. large, outdoor atmospheric tanks can store thousands of gallons of rainwater, well water, or be used for fire suppression..
and even here are some various graphics as a result of distinct origins Graphics How many gallons of water does a roof shed
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