Green Roof Infiltration

In fact a green roof replicates the natural landscape allowing water to infiltrate the vegetation substrates and engineered drainage layers of the green roof.

Green roof infiltration.

Integrating a green roof into a historic building rehabilitation project may appear to be an easy solution to reducing the urban heat island effect improving storm water management and improving the energy efficiency and sustainability of the building. Rainwater harvesting green roofs vegetated swales and. Other practices designed for decreasing peak flow that do not require soils with high infiltration rates. This is most noticeable in intensive green roofs since there is a thicker and more consistent layer of soil which provides a higher insulating value.

Integrate practices into your treatment drains to mitigate stormwater impacts including. Green roofs are unique in that they have the ability to capture and retain a volume depth of rain from each rainstorm. A green roof will typically intercept the first 5mm and more of rainfall providing interception storage. Impervious roof areas that direct runoff onto the green roof cannot exceed 50 of the green roof area which is equivalent to a maximum hydraulic impervious runoff loading ratio of 0 5 1.

Use practices that do not require infiltration.