Rain Water Collection On Roof

Rainwater can be stored in rain barrels for later use or moved directly into cisterns so it can be used right away.

Rain water collection on roof.

Water is often in short supply in the heat of summer so it s tempting to use roof runoff. Doesn t that sound like a lot of water that you could harvest and use for free. Rainwater harvesting is collecting the run off from a structure or other impervious surface in order to store it for later use. Traditionally this involves harvesting the rain from a roof.

Collecting the rainwater that runs off your roof is a great way to conserve an important natural resource. The water is collected in the gutters moves through the downspouting and then finally collects in some sort of storage container. Code to add this calci to your website. However a study published by the scientific world journal shows that the amount of rainwater collected by individual homes would have little to no effect on the hydrologic cycle on a macro level.

Roofing materials gutters piping and storage materials can introduce harmful chemicals like asbestos lead and copper to the water though building standards minimize some of this 6 8. Around 600 gallons of rainwater can be harvested from about one inch of rain if it falls from a thousand square foot roof. Well we thought so too. To find how much rain you can collect in an average rain year multiply this number by the average inches of rain.

It s been believed that the collection of rainwater would halt the rainfall s natural flow into the earth s aquifers and streams. If you re installing a new roof for the purpose of collecting rainwater standing seam metal may very well be your best choice. Dirt and germs can be washed into collected rainwater from the roof especially when rain follows several days of dry weather 3 4 9. Typically a roof acts as the main collection source.

1 of rain on 1 000 sf roof will yield 623 gallons roof area m2 x precipitation amount mm amount collected liters. Rainwater collection calculation formulas and equations roof area ft2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember. If your average rainfall was 25 inches year your annual collection potential is 1 120 x 25 28 000 gallons year. Rainwater can be collected from the roofs using the rain water harvesting method.

The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area. The rain will collect in gutters that channel the water into downspouts and then into some sort of storage vessel.