2. Make the residential area look more upscale: the distribution of green space in the residential area is an important symbol of good living quality. Therefore, in a community with high greening rate, the lower the building area, the higher the user's comfort and the more upscale the community is.
3. Conducive to residents' health: With the gradual increase of urban population, air pollution is more serious. Green plants can purify the air through photosynthesis, so that people who have been under urban pollution for a long time can enjoy a green and healthy life.
4. Adjust air humidity and temperature: During the growth of trees, it takes about 300-400 kg of water to form 1 kg of dry matter, because 99.8% of the water absorbed by the roots of trees will be evaporated, leaving only 0.2% for photosynthesis, so the air humidity in forests is 38% higher than that in cities, and that in parks is 27% higher than that in other parts of cities. Trees can reduce the direct sunlight to the ground, and can consume a lot of heat to transpiration the water absorbed from the roots and make nutrients. Especially in summer, the temperature of green space is 3-5℃ lower than that of non-green space, and the community with high greening rate is a good place for heatstroke prevention and cooling.
5. Sound absorption, silencing and reducing urban noise: Because the gap between leaves and branches is like a porous sound absorption material, noise sound waves are irregularly reflected in all directions by leaves, thus achieving the effect of noise reduction; On the other hand, because leaves and branches vibrate with sound waves, the sound is consumed.
Calculation range of greening rate in residential area
1, public * * * green spaces include belt-shaped and block-shaped green spaces such as central green spaces at all levels, rivers and lakeside green spaces. At the same time, the width is not less than 8m and the area is not less than 400_.
2. The main difference between the central green space and the green space beside the house (between houses) is that more than one third of the green space is outside the prescribed building spacing. It can be used as the central green space, otherwise it can be used as the green space next to the house (between houses).
3. The starting and ending boundaries of the calculation of the green space area beside the house (house) are: for the house road, the group road and the residential road, the green space boundary is calculated to the roadside, and when there is a pedestrian walkway on the residential road, it is calculated to the sidewalk side; Along residential roads and urban roads, calculate to the red line; From the foot of the building 1.5m, other fences and courtyard walls are calculated to the corner.
4. Calculation of road green space area: based on the planned green space area within the road red line.
5. The starting and ending boundaries for calculating the green area of the courtyard group are: for roads, group roads and residential areas between houses, the green boundary is calculated as 1m from the roadside, and if there is a sidewalk in the residential area, it is calculated as the sidewalk; Along residential roads and urban roads, calculate the red line to the road; 1.5m away from the bottom of the building.
6. The starting and ending boundary of the block and strip public green space area is the same as that of the courtyard group green space, and it is calculated along the red line of the public green space of residential roads and urban roads.