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A blue roof is a roof design that is explicitly intended to store water, typically rainfall, while also putting the rainwater to other good uses such as cooling of solar panels and irrigation of a green roof. The first blue roof was the winning entry (First Place, 10,000 Euro prize) in the 2004 Coram Sustainable Design Award, by Steve Mann〔Winners, 2004 Coram International Sustainable Design Award, http://www.experientialdesignlab.com/projects/auxiliary-projects/blue-roof〕 More recent work on blue roofs have involved pilot projects using stormwater collection.〔(【引用サイトリンク】url=http://www.nyc.gov/html/dep/html/stormwater/green_pilot_project_ps118.shtml )〕 Blue roofs can provide a number of benefits depending on design. These benefits include temporary storage of rainfall to mitigate runoff impacts, storage for reuse such as irrigation or cooling water makeup, or recreational opportunities. Blue roofs can include open water surfaces, storage within or beneath a porous media or modular surface, or below a raised decking surface or cover. Blue roofs that are used for temporary rooftop storage can be classified as "active" or "passive" depending on the types of control devices used to regulate drainage of water from the roof. A number of blue roof pilot projects have been implemented around the country.〔(【引用サイトリンク】url=http://www.continuumoflearning.com/the-advantages-of-opting-for-blue-roofing-systems/ )〕 A significant blue roof pilot project intended to evaluate the potential of the systems for mitigating combined sewer overflow impacts was conducted between 2010 and 2012 by the New York City Department of Environmental Protection. The NYCDEP blue-roof projects are the first to utilize a novel passive blue roof tray design which relies on the lateral transitivity of non-woven filter fabric for drawdown control in a full scale pilot. Monitoring of these systems has demonstrated their performance as an effective means for mitigation of peak flows and alteration of timing in combined sewer systems.〔(【引用サイトリンク】url=http://www.roofingmagazine.com/?s=geosyntec )〕 Blue roofs are often privately owned, and make efficient use of the otherwise very limited space available in the urban core of a highly populated city. Some recreational blue roofs integrate rooftop waterplay areas that can also be used to irrigate a green roof, or to cool the roof of a building on hot days, in order to eliminate or at least reduce the HVAC load placed on mechanical refrigeration equipment. ==The seven features of the original blue roof design== Mann's original blue roof design had the following seven features:〔Excerpt from the winning entry to th Coram International Sustainable Design Award, http://wearcam.org/ecoshower/〕 1. Rain water is collected from the flat roofs, and stored in tanks for treatment such as filtration. The treatment is powered by wind and sun. 2. The lower roof has a rooftop garden that is irrigated by the used shower water. If one or more people use the shower on a daily basis, there is enough used shower water to irrigate a good sized rooftop garden. 3. The result is a zero-runoff roof that re-uses the rainwater twice: once for showering, and then again for irrigation of the rooftop garden oasis. 4. Additionally, the shower base contains micro radar systems to track the body of the user, and rainwater is directed exactly at the flesh, so that none of the reclaimed rainwater is wasted. 5. During heavy rainfall seasons, when there is more water than what is needed for showering and irrigation, excess water is used to cool the solar panels so that they run more efficiently. 6. The urban oasis also retains rainwater in the rooftop garden, to help keep the building cool in warm weather. This eliminates the need for mechanical cooling (air conditioning) on the top floor. Additionally, occupants can use the shower for a quick rinse at various times of the day, to cool off in hot weather, thus reducing or eliminating the need for mechanical cooling equipment on the roof. 7. This results in a reduction or an elimination of electricity consumption, since air conditioning accounts for a major portion of electrical utilities load. Additionally, the solar panels and wind turbine collect sufficient energy to power other electrical equipment in the building, in addition to the shower. This other equipment includes rooftop lighting so that the garden oasis and outdoor shower can be enjoyed day or night. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Blue roof」の詳細全文を読む スポンサード リンク
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