In fact it is quite common to harvest water from green roofs in germany and switzerland.
Green roof system of rainwater harvesting.
Rainwater harvesting is a very simple process.
I am glad the article has been covered so well because it brings concerns to the quality of rainwater and stirs up questions about materials used in each system.
I am responding to the january 31 2010 texas water development board article effect of roof material on water quality for rainwater harvesting systems that has been resurfacing around the internet lately.
The amount of water available to a rainwater harvesting system is about 90 for pitched roofs and around 75 for flat roofs.
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However there are two issues.
This practice could be particularly valuable in arid regions where it could reduce demands on increasingly limited water supplies.
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By using green roofs as rainwater capture areas the amount of collected water for reuse will be reduced already due to the absorbed amount of water in the system itself.
Green city resources is a cincinnati northern kentucky based woman owned landscaping company specializing in the design installation and maintenance of stormwater management systems.
With this system it is set in a way that it takes the rainwater directly to your plants.
Leiyuan industrial is the manufacturer of gs tanks and other plastic materials from china 15 years of experience manufacturer the products be used for projects throughout the world successfully.
So for example a 100m2 london roof pitched might send 52m3 of water to the tank per year.
Thus the concave roof is made to help make even the smallest quantities of rain flow down the roof and eventually coalesce into bigger drops just right for harvesting before they evaporate.
However you require a liner to shield your roof as well as a drainage system that takes care of the excess runoff.
Rainwater harvesting systems collect and store rainfall for later use.
For green or even brown roofs the amount is 40 at best.
Furthermore it is possible utilise rainwater harvesting of a green roof contrary to claims from other industries.
A green roof system atop a building.
Green roof systems are one of the best ways to manage stormwater runoff by reducing and delaying.
Rather than the rain running off the roof into the gutter and into the drainage system the tank will catch filter and store this water for non drinking uses allowing us to make use of surface water before it taking up valuable space in our sewer systems.