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      Effectiveness of Low Impact Development Practices: Literature Review and Suggestions for Future Research

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      Water, Air, & Soil Pollution

      Springer Nature

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          Most cited references 112

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          Low Impact Development Practices: A Review of Current Research and Recommendations for Future Directions

           Michael Dietz (2007)
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            Green roof performance towards management of runoff water quantity and quality: A review

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              Green roof stormwater retention: effects of roof surface, slope, and media depth.

              Urban areas generate considerably more stormwater runoff than natural areas of the same size due to a greater percentage of impervious surfaces that impede water infiltration. Roof surfaces account for a large portion of this impervious cover. Establishing vegetation on rooftops, known as green roofs, is one method of recovering lost green space that can aid in mitigating stormwater runoff. Two studies were performed using several roof platforms to quantify the effects of various treatments on stormwater retention. The first study used three different roof surface treatments to quantify differences in stormwater retention of a standard commercial roof with gravel ballast, an extensive green roof system without vegetation, and a typical extensive green roof with vegetation. Overall, mean percent rainfall retention ranged from 48.7% (gravel) to 82.8% (vegetated). The second study tested the influence of roof slope (2 and 6.5%) and green roof media depth (2.5, 4.0, and 6.0 cm) on stormwater retention. For all combined rain events, platforms at 2% slope with a 4-cm media depth had the greatest mean retention, 87%, although the difference from the other treatments was minimal. The combination of reduced slope and deeper media clearly reduced the total quantity of runoff. For both studies, vegetated green roof systems not only reduced the amount of stormwater runoff, they also extended its duration over a period of time beyond the actual rain event.
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                Author and article information

                Journal
                Water, Air, & Soil Pollution
                Water Air Soil Pollut
                Springer Nature
                0049-6979
                1573-2932
                September 2012
                June 8 2012
                September 2012
                : 223
                : 7
                : 4253-4273
                Article
                10.1007/s11270-012-1189-2
                © 2012
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