Blue Roof Water Retention

This type of water roof is called a water roof for rainwater retention.

Blue roof water retention.

The water only remains on the roof for a short period of time after rainfall. A blue roof is a roof of a building that is designed explicitly to provide initial temporary water storage and then gradual release of stored water typically rainfall. Or 2 the system drains too quickly due to leaking or other. Blue roofs are constructed on flat or low sloped roofs in urban communities where flooding is a risk due to a lack of permeable surfaces for water to infiltrate or seep back into the ground.

The water needs to be drained off to create sufficient storage capacity in time for the next rainfall. Problems with a blue roof system generally fall into two categories. The rainwater is drained off at a delayed pace using a narrower lower situated opening. Retention means that a specific volume of water is retained on the roof for an indefinite period of time.

A blue roof may be used as a stand alone detention method or because they do little to improve the water quality of runoff as part of a treatment train that includes other low impact development and conventional best management practices bmps such as bioretention infiltration wetland systems or green roofs to enhance the function improve.