Are Green Roofs True Stormwater Management Tools? Part 3 by Purple-RoofAn audio article by Oscar Warmerdam______Detention is the process of absorbing or holding water during a storm, then slowly releasing it. Unlike retention, detention works regardless of the weather. When a detention-oriented system drains, it recharges. So, a detention-oriented green roof can recharge quickly, and be ready for the next storm, or the tail end of a large storm. Even in dark and cloudy weather! Retention cannot do this, retention takes weeks to re-charge, and it better otherwise the plants would not have enough water.Detention slows the flow of water, so that the hydrologic characteristics more closely resemble that of a forest, with peak runoff being delayed from peak rainfall.______Read the full article on the Purple-Roof blog:https://www.purple-roof.com/post/green-roofs-stormwater-management-tools_______Don't hesitate to contact us if you have any questions at[email protected]