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[[File:Blue roof concept.jpg|thumb|Schematic of flow control valve type blue roof/ rooftop detention]]
+[[File:Blue roof concept.jpg|thumb|Conceptual diagram of flow control drain cover type blue roof/ rooftop detention]]
==Overview==
==Overview==
Blue roofs, or rooftop detention is a popular stormwater management option for many developments. The appeal is the relatively low cost and simplicity of modelling and forecasting performance.
Blue roofs, or rooftop detention is a popular stormwater management option for many developments. The appeal is the relatively low cost and simplicity of modelling and forecasting performance.