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EnglishStorm water management performances of green roofs may differ in various climatic regions due to the specific precipitation climatology, building practices, and green roof materials. Although a wide range of experimental results are now available in continental or nordic climate regions, few data about green roof performances in a Mediterranean climate have been presented in the literature. To this aim the University of Genoa recently developed a joint laboratory and full-scale experiment by installing a “controlled” plot with known rainfall input and a companion green roof research site in the town of Genoa. In September 2007 the small size system was completed in the laboratory, namely a plot of 2.5 m2 aimed at performing runoff tests in a controlled environment using rain simulators, with varying slope, depth and type of soil layers. The full-scale system was obtained by retrofitting an existing single-layer vegetated roof built in the sixties into a modern technological system fully equipped with sensors for on-site meteorological and flow rate measurements. For the interpretation of the results two approaches aimed at simulating the hydraulic response of green roofs have been implemented including both a complete unsaturated flow model and a simplified conceptual model based on a limited number of parameters. The collected green roof runoff data, with an average percent retained volume of 73% and an average percent peak reduction of 92%, show the great potential for the development of green roof technologies in Mediterranean countries.
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| Titolo: | Green roof storm water detention: laboratory and full-scale experiences in the Mediterranean climate |
| Autori: | |
| Data di pubblicazione: | 2008 |
| Abstract: | Storm water management performances of green roofs may differ in various climatic regions due to the specific precipitation climatology, building practices, and green roof materials. Although a wide range of experimental results are now available in continental or nordic climate regions, few data about green roof performances in a Mediterranean climate have been presented in the literature. To this aim the University of Genoa recently developed a joint laboratory and full-scale experiment by installing a “controlled” plot with known rainfall input and a companion green roof research site in the town of Genoa. In September 2007 the small size system was completed in the laboratory, namely a plot of 2.5 m2 aimed at performing runoff tests in a controlled environment using rain simulators, with varying slope, depth and type of soil layers. The full-scale system was obtained by retrofitting an existing single-layer vegetated roof built in the sixties into a modern technological system fully equipped with sensors for on-site meteorological and flow rate measurements. For the interpretation of the results two approaches aimed at simulating the hydraulic response of green roofs have been implemented including both a complete unsaturated flow model and a simplified conceptual model based on a limited number of parameters. The collected green roof runoff data, with an average percent retained volume of 73% and an average percent peak reduction of 92%, show the great potential for the development of green roof technologies in Mediterranean countries. |
| Handle: | http://hdl.handle.net/11567/277056 |
| Appare nelle tipologie: | 04.01 - Contributo in atti di convegno |
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