Green Roofs Reduce Flooding

They have become very popular across europe.

Green roofs reduce flooding.

Green roofs for stormwater management. Green roofs reduce the volume of storm water runoff and filter the storm water runoff that does leave the roof. Storm runoff typically picks up oil trash and other pollutants from roadways which then get pushed into sewers and waterways. They reduce flooding erosion and artificial heating of water which helps preserve the ecological integrity of surrounding bodies of water.

And can be designed for public access. In addition green roofs reduce the cooling and heating needs of buildings. As a result they have become popular across europe. Green roofs roofs that are covered with vegetation by their very nature absorb rainwater and help to mitigate flooding.

Extend the life of the roof membrane. The saturated soil will slowly release water off the roof but the green roof slows the process down reducing the risk of a flash flood. Green roofs reduce the need for on site storm water management systems and according to seattle based magnusson klemencic associates under certain conditions can offset the cost of a green roof by 30 to 60. Compared to other strategies green roofs are relatively low impact as they utilise existing space.

A green roof can retain around 75 of the runoff in summer source. To represent this many green roofs in our region are referred to as living roofs or eco roofs. Besides reducing urban flooding green roofs also help reduce pollution. Both green and blue roofs reduce stormwater peak flood and runoff volume.

If green roofs reduce that runoff they contribute to cleaner creeks rivers and oceans. In region 8 most green roofs are not actually the color green. Provide pollutant removal through uptake and filtering. A green roof can help prevent this by retaining water in the plants and growing medium thus slowing and reducing the amount of storm water entering the ecosystem and consequently reducing flooding and erosion.

Green roofs are a green infrastructure gi option that can be applied to virtually any rooftop given weight load capacity. A green roof system atop a building helps manage stormwater and reduce energy costs for cooling. However as part of a wider rainwater management scheme they can be a useful contribution. To mitigate the risk of flooding in urban areas a number of strategies have been proposed including roofs that are covered with vegetation to absorb rainwater.