Changes

[[File:Blue roof concept.jpg|thumb|Conceptual diagram of flow control drain cover type blue roof/ rooftop detention]]

[[File:Blue roof concept.jpg|thumb|500px|Conceptual diagram of flow control drain cover type blue roof/ rooftop detention]]

Blue roofs can be a very economical and low maintenance way to manage undesirable rainwater on a flat roof. For rooftop retention on moderately sloped roofs, a [[green roof]] is going to be a better choice. On steeply sloped roofs, [[rainwater harvesting]], or diverting roof leaders to a landscape integrated LID is a more appropriate alternative.   

Blue roofs can be a very economical and low maintenance way to manage undesirable rainwater on a flat roof. For rooftop retention on moderately sloped roofs, a [[green roof]] is going to be a better choice. On steeply sloped roofs, [[rainwater harvesting]], or diverting roof leaders to a landscape integrated LID is a more appropriate alternative.   

==Overview==

==Overview==

Blue roofs, or rooftop detention, is a popular stormwater management option for flat roof buildings, particularly within the industrial, commercial and institutional (ICI) sector. The appeal is the relatively low cost and simplicity of modelling and forecasting performance.  

Preceded by green roof and flow control roof drain systems, blue roof systems are an innovative green technology for flood and drought resilience and adaptation. Blue roof systems temporarily capture rainwater using the roof as storage and allow it to evaporate and/or to be used for non-potable requirements (i.e. irrigation, toilet flushing, truck washing) and ultimately offset potable water demands. Any remaining water can be gradually released into the municipal stormwater system reducing peak flow rates. Additionally, during the summer season, rainwater ponded on a flat roof can cool the interior of a building and reduce air conditioning pressures through evaporative cooling. As such, smart blue roof systems are advantageous to both the private and public sector.

 

Blue roof systems regulate rooftop runoff by storing and controlling the release of rainwater, thereby reducing the potential of overflow in the municipal sewer system and thus, the potential for localized flooding. Combining a blue roof system with rainwater harvesting (RWH) allows for rainwater reuse and provides additional benefits. Blue roof systems are a popular stormwater management option for flat roof buildings, particularly within the industrial, commercial and institutional (ICI) sector (which make up 23 - 30% of most urbanized areas) <ref>Credit Valley Conservation. 2020. Automated Real-time IoT Smart Blue Roof Systems for the IC&I Sector for Flood and Drought Resilience and Adaptation Technical and Financial Feasibility Study. Credit Valley Conservation, Mississauga, Ontario. https://sustainabletechnologies.ca/app/uploads/2019/02/Smart-Blue-Roof-Lit-Review-Feb-2019.pdf. The appeal is the relatively low cost and simplicity of modelling and forecasting performance,</ref>.  

{{textbox|Blue roofs are ideal for:

{{textbox|Blue roofs are ideal for: