Extensive green roofs will capture and retain about 55 of the annual rainfall thereby reducing stormwater runoff to the storm drainage system in pennsylvania.
Green roof absorb rainwater.
Green roofs can be effective in both urban and rural areas as a solution to managing rainwater drainage.
A green roof absorbs rain water by the water buffering in the plants substrate and drainage layer.
Keep in mind that this assessment only applies to the green roof footprint which is typically less than 90 of the building footprint not the whole parcel being developed.
Up to 75 of rainfall is absorbed by an extensive living roof and up to 90 is absorbed by an intensive green roof system.
Rainwater is essential for life.
This delays the discharge of rainwater to the sewage system purifies the rainwater and water also evaporates through the plants.
Green roof systems are one of the best ways to manage stormwater runoff by reducing and delaying.
Green roofs absorb rainwater and grow food.
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But too much of it especially in the city can lead to flooding causing sewers to overflow and carry pollutants and contaminants to nearby streams and waterways.
It helps plants and food crops flourish and it keeps grasslands green and lush.