Green Roofs Water Management

Up to 75 of rainfall is absorbed by an extensive living roof and up to 90 is absorbed by an intensive green roof system.

Green roofs water management.

Green roofs can improve stormwater management. Grhc s virtual symposium will explore both design and policy measures that can improve a community s resilience while also providing a host of other benefits. Green roofs can remove carbon dioxide and produce oxygen. Excess water drips from the roof gradually so drains are not overwhelmed by a sudden deluge.

Green roofs the key hydrological mechanism for interception storage and filtration of water. Stormwater management is a growing concern for numerous municipalities especially given the increase in flooding events. The use of any technique or approach that reduces the rate and volume of rainwater runoff has the potential to contribute to better management of the overall quality of rainwater one approach that is used more and more frequently in the management of rainwater i e. Somewhere between 40 and 80 percent of the total volume of rain that falls on green roofs can be retained.

Stormwater management is the. The plants and growing medium of a green roof absorb water that would otherwise become runoff and research indicates that peak flow rates are reduced by 50 percent to 90 percent compared to conventional roofs. Green roofs are determinant for the hydrologic restoration in urban areas and an interesting alternative to more conventional practices. They provide a way for roofs to be converted into pervious areas and used beneficially rather than contributing to storm water management problems palla et al 2009 the overall aim of this chapter is to analyze and discuss the interactions.