Green Roof And Water Harvesting

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Green roof and water harvesting.

The highest zn concentrations were seen in the harvested rainwater after the first flush from the green and metal roofs. 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. We also specializes in healing gardens horticulture therapy gardens and sustainable. Green roofs have more use than just rainwater management its benefits also include.

Rainwater harvested after the first flush from the green roof consistently showed the lowest concentrations of al fe cr and cu. The amount of water available to a rainwater harvesting system is about 90 for pitched roofs and around 75 for flat roofs. The elmich green roof demonstrates how such a green roof can contribute to. Extensive green roofs potsdammer platz berlin rainwater harvesting.

After landing on a roof the rainwater harvesting system collects and filters water into tanks through the design using first flush technology diverting the filth washed from the roof and allowing the clean mineral free water to be stored in the tank. Furthermore it is possible utilise rainwater harvesting of a green roof contrary to claims from other industries. So for example a 100m2 london roof pitched might send 52m3 of water to the tank per year. 2 reduces dependence on and cost of municipal water services.

3 reduces residential taxes like storm water management fees. But if it was a green roof this would fall to only 23 3m3. Rainwater can be collected from green roofs although the volume will be much reduced. Green city resources is a cincinnati northern kentucky based woman owned landscaping company specializing in the design installation and maintenance of stormwater management systems.

A typical green roof build up consists of standard waterproofing a drainage layer and a layer of growing medium which the planting grows into. A green roof may also include a water retention layer to support the plants during a period of dry weather. Why green roof rainwater harvesting. Rainwater harvesting systems can be found worldwide and whist tending to be suited to the tropics or rainy areas can be applicable in arid or semi arid areas.

For green or even brown roofs the amount is 40 at best. However there are two issues. 1 conserves valuable water resources especially in drought stricken areas. Versidrain 25p drainage and water retention trays installed on the 120 sq m elmich green roof blanketed over with geotextile fabric enabled enviromix a lightweight primarily inorganic planting media to be placed on the trays for planting on the green roof and ramp.

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.