In a sense, people build a building, is to destroy a piece of natural land, if we can make full use of the building roof and other various facade space for green, can put up the green space compensation. This not only beautify our life, but also the city better melt in nature. Following Yu Shun Industrial Xiaobian tell you the benefits of green roofs where:
1 to improve the ecological environment of the city is the main body of the roof, the plant in the roof planted as the same as the plant, has to absorb carbon dioxide, release oxygen, absorb toxic gases, block dust, etc.. In addition, due to the special environment of the roof, the roof plants can purify the air in the urban space, which can not reach the effect of the ground vegetation. The rain is absorbed by the plants of the roof, through evaporation and transpiration of plants to the atmosphere, adjust the air humidity, clean urban air, so as to achieve the purpose of improving urban air and ecological environment. At present, the general living buildings about 1/4 of the urban land area, if the roof of the living building, the construction of the green cover area, in accordance with the sustainable development of the green into the building space, to build a green building, so the roof greening will become an important part of human sustainable development strategy.
2. Beautify urban landscape beautiful city space environment and the main buildings in the geometric space compared, roof garden with warm, rich and full of vitality of the artistic effect, through the seasonal changes in plant morphology and color, giving the building a different seasonal beauty, form a multi-level air beauty, the green space and building groups of mutual penetration, merges into one organic whole, rich and beautify the urban landscape. Roof garden to the nature of the green landscape moved to the building, the plant morphology, color, beautiful, beautiful, beautiful, beautiful, in front of people, to increase the rate of green, to ease people's tension, eliminate fatigue, relieve mental stress, maintain normal heart state will play a good role.
3 to reduce the urban heat island effect and improve the urban ecosystem
(1) to ease the surrounding small climate and improve the urban environment. Urban air pollution has become a major environmental problem because of the pollution caused by the means of transport and the air conditioning equipment. At the same time, the roof greening can inhibit the rise of the internal temperature of the building, increase the humidity, prevent light reflection, wind, the improvement of small environment has a significant effect. And the number of &ldquo around the site of the green space, improve the ” the cross function of the city as a whole to improve the climate conditions, for the growing “ urban heat island &rdquo. United Nations Environment Department's research shows that if a city roof greening rate of 70% or more, the city over the carbon dioxide content will fall 80%, the heat island effect tends to disappear.
(2) create space within the city of biological symbiosis. The symbiosis between man and nature is the direction of the development of modern cities, and the urban ecological system is the foundation of sustainable development of the city. The excessive expansion of the city has disturbed the local ecological system, and the ecological balance of nature has been destroyed, which makes many local species disappear, reducing the natural area of the green, and increasing the area of hardening. The system of roof greening and vertical greening facilities can repay the effective ecological green area, and provide new living space for wild animals and plants, thereby increasing the diversity of urban ecological system, and can improve the urban environment.
4. Increase the building energy-saving effect of roof greening for building it is cool in summer and warm in winter & ldquo; green air conditioning & rdquo; promotion of roof greening area in a certain extent have to relieve the energy crisis of the city.
(1) summer heat insulation. Green roof can absorb the radiation heat of the summer sun, effectively prevent the roof surface temperature rise, thereby reducing the roof of the indoor temperature. Beijing Garden Science Research Institute of the results show that: in the summer, the Beijing area green roof can keep the indoor temperature is lower than the green room temperature 1.9 ~ 1.3. C; in winter, the green roof can keep the indoor temperature of 1 ~ 1.1 higher than that of the green room. Because of the large size of the roof, the roof is larger than the wall, and the heat from the roof into the interior of the building is more than 70% of the total building envelope.
(2) winter warming effect. Winter, indoor heat due to the layer of plantation and dissipation is not easy, external low temperature not intrusive, which can play a role in the cold resistance and thermal insulation. In the north, the roof greening, such as the use of carpet planting ground cover plants, the ground cover plants and their under the &ldquo of the soil composition of the; blankets ” layer can play a role in the roof insulation layer, to achieve the effect of winter heat preservation, summer heat insulation.
(3) sound insulation. Because the plant layer on acoustic absorption, and green roofs can sound insulation and noise reduction, in accordance with the hosier & middot; principle of Schmid, compared to the green roof and gravel roof, noise reduction is 20 ~ 30 dB. According to the relevant information, the roof of the soil 12cm thick when the sound insulation is about 40dB, 20cm thick when the sound insulation is about 46dB.
(4) building energy efficiency. According to the latest results of research institutions, in the hot summer, such as the construction of the whole Beijing City, the increase in the amount of heat to use air conditioning cooling, the total power consumption is about 95570000 degrees / day, assuming that in accordance with the 0.48 yuan / kWh of electricity, the energy consumption is about 45740000 yuan / day. Conversely, in the cold winter, such as the roof building lost heat of the use of air conditioning heating of the total electricity consumption equivalent to 887.7_wan million degrees / day, energy consumption totaled about to 426 million yuan / day. Well, the total energy consumption is about 50000000 yuan / day. If the 7000ha flat roof area of 30% green projections, the energy consumption can save 15000000 yuan / day.
5. Reduce roof drainage, reduce the pressure of urban drainage system after green roofs can store a large amount of natural precipitation, reducing the pressure on the urban drainage system. Generally speaking, there are about 80% of the ordinary roof rain water into the sewer, in the rainy season, which has formed a lot of pressure on the sewer. After the roof greening, 50% of the rain on the roof, stored in the root of the plant and the cultivation medium, to be gradually evaporated, thereby reducing the pressure on the sewer, the city has played a role in the environment.
6 to the construction of the protective effect of flat roof construction roof structure of the damage, in most cases is caused by temperature stress of roof waterproof layer, and a little part of the load bearing objects, through temperature changes caused by roof structure expansion and contraction, so that the building cracks, resulting in the infiltration of rain, and the formation of roof leakage. Due to long-term exposure to the air, the building roof is exposed to the sun, and the winter snow and ice and snow erosion, the temperature difference is very big, the big thermal stress is more easily damaged roof structure, so that the building cracks, resulting in rain water. Green roofs avoid direct exposure to the sun and snow erosion, reduce the roof structure layer temperature changes, greatly reduces the concrete roof panel due to thermal expansion and contraction caused by the cracking probability and protection construction waterproof layer of roof, extending the building's life.
7 to expand the recreation space, promote and beautify the city image of the role of the green building is beneficial to people's physical and mental health, but also enrich the environment, to establish a good city image, gathered commercial facilities and entertainment facilities and attract visitors a great role. Building on the implementation of the three-dimensional green, urban streetscape facade become more rich and colorful, in creation and coordination of the surrounding environment of the urban landscape at the same time, you can soften the hard line construction brings a sense of irritability, make the city a more natural, more humane, for people to open up more leisure space.
Roof greening not only adds to the city, but also provides a leisure place for people to work and rest on the natural and harmonious platform.