Arizona Landshapes Inc has designed and built a number of water harvesting projects. From the simple passive system to a fully automated system, we have the experience and skill to design and build your rain water harvesting system.
Cistern Calculations Below
Rainfall (ft) X Roof Size (sqft) X 7.48 (gal./ sqft) X Runoff Coeficient = Size of Cistern (Gal.)
Ex. Rainfall .25 ft X 2500 sqft X 7.48 X .80 (Runoff Coefficient of an asphalt roof) = 3740 Gallons
A tank of 3740 gallons would be required to capture the runoff from this storm.
This is just an example calc. If planning to install a cistern, it’s wise to plan for a series of storms over a period of time. Call us. We are glad to help. (520) 429-4047