Urban greening roofs perspective sponge saving technology through the national identification key

AUTHOR： DATE：2016/5/26 14:27:04 VISITS：

  May 21, 2016, "three-dimensional sponge roof greening urban energy conservation and demonstration of key technologies," the appraisal of the results of the assessment will be held by the Chinese Academy of Environmental Sciences.

  China's large urban population density, traffic congestion, urban heat island effect and global warming, particularly air pollution, haze so that many cities face the environmental crisis; but cities by population density and urban architecture forming the traditional way is very green city difficult to be effective, urban greening bottlenecks.

  As we all know, the construction of ecological civilization has become the focus of the direction of nation-building, the urban heat island effect increases year by year, while the urban green area has "virtual growth." This is the declining urban vegetation, plates of strengthening, increase the green outskirts of the city so that the green data growth, "One square meter of urban greening effect on the city's outskirts equivalent to two hundred square meters." When the temperature around 37-38 degrees Celsius, there is no green ground has reached 46-47 degrees Celsius, while the green roof carried on the roof temperature is only 29-30 degrees Celsius. Green roof has outstanding ecological value of the building itself, energy conservation, regulate local climate, alleviate the urban heat island effect, improve the urban landscape, etc. all have a prominent role, in line with the current development of new social norm requirements.

  Chinese Academy of Sciences Liu Hongliang environment for example, said: "If realized 77 million square meters of the roof of the old city, will be very effective in improving the city's air, reduce haze, while reducing pressure on the city sewer." Green roof as much ground greening, should be incorporated into the existing ground greening regulations, urban greening area increase, reduce urban waterlogging, clean the air, reduce the urban heat island effect, green roof technology has matured, we can solve these problems.

  "Urban Greening Beijing to ease the urban heat island effect," the report pointed out: When the green coverage rate reached more than 30%, there are green urban heat island mitigation, when the green coverage rate reached more than 40%, heat island area can be reduced by four thirds, when the green coverage rate reached 60%, the heat island effect is substantially controlled.

  Metropolitan land resources are scarce, the contradiction between the rising cost of green space and more prominent, while the fifth is called the roof of the building facade, "do not take place, but it increases the green area of the city, adsorption and dust in the air carbon dioxide and release oxygen, improving urban air quality, plant leaves and soil water evaporation process can heat cool "to some extent. Guangzhou Green Chong Bowes overtime more than ten years development, promotion, the "Death is not grass" - coniferous Sedum continuous improvement, so the technology has become an effective way to improve the urban ecology is the cheapest form of greening the city center, it can block UV damage to the roofing, reducing the heat island effect, the absorption of dust and atmospheric pollutants, blocking PM2.5 pollution, reduce urban noise, increased negative oxygen ions.