LID Method - Roofs

Buildings can be designed so that rainwater falling on a sloped roof is captured by gutters and delivered to drywells, rain barrels, or rain gardens near the building. The water collected in rain barrels or larger cisterns can then be used for irrigation and infiltration back to groundwater. Rainwater can also be retained on a flat "Green Roof" that insulates, cools, and evaporates stormwater despite being only 2-3 inches thick. Heavy storms may generate some runoff, but green roofs and drywells can accommodate runoff from most storms. Even roof color makes a difference: white roofs don't heat rainwater as much as dark roofs. For more information:
Local LID/Groundwater Recharge Projects
Green roofs database of projects nationwide