Green Roof Method Of Rainwater Harvesting

Green roof technology is improving all the time.

Green roof method of rainwater harvesting.

Normally water is collected from building roofs and stored in dedicated water tanks. In rooftop rainwater harvesting the rainwater is captured from the roof and directed downwards through a rainwater pipe into a water storage tank or a container. Looking at buildings we can slow the rate of rainwater runoff from roofs with the use of green roofs. The harvesting of rainwater is as simple as collecting water from surfaces on which rain falls and subsequently storing this water for later use.

Extensive green roofs potsdammer platz berlin rainwater harvesting. Water collected in storage tank s and pumped directly to points of use. Green roof there is another method of rainwater harvesting that cuts out the middleman so to speak. Rainwater harvesting represents an alternative water supply that captures and stores rainwater for later use.

Rainwater harvesting can be classified into rooftop rainwater harvesting and surface runoff harvesting. Water collected in storage tank s pumped to an elevated cistern and then fed by gravity to the points of use. With this system it is set in a way that it takes the rainwater directly to your plants. There are three main types of rainwater harvesting system.

Contrary to the other systems above which collects the rainwater into a storage container a green roof system doesn t. Greenroofs are a best management practice in reducing and delaying stormwater runoff. A typical green roof build up consists of standard waterproofing a drainage layer and a layer of growing medium which the planting grows into. This simple practice reroutes rooftop drainage pipes from draining rainwater into the storm sewer to draining it into rain barrels cisterns or permeable areas.

By using greenroofs as rainwater capture areas the amount of water will be reduced making the system cost less efficient and difficult to gauge water collection. Water from the roof flows from this disconnected downspout into the ground through a filter of pebbles. In fact it is quite common to harvest water from green roofs in germany and switzerland. Rooftop rainwater harvesting systems are useful for augmenting the water systems in both urban and rural areas and they are excellent for use in arid and semi arid areas where traditional water sources are not readily available.

There have been many studies on green roofs and water quality around the world. Types of rainwater harvesting. Water collected in storage tank s and fed by gravity to points of use.