| Greenbelt is an important part of urban green space system. It can be more efficient use of urban land, beautify the city, improve the quality of the city and improve the urban ecological environment. The research results might be referred for ecological benefit evaluation of the urban greenbelt,and for the design, modification and management of the urban greenspace.In this paper greenbelts on both sides of the Zhongzhou road between Jinshui road and Zhengbian road were selected to study on the effects of different green space structure on temperature and humidity. According to the indicators of greenbelt width, building environment, plant configuration mode,space type of the greenbelt select 6 samples to observation.In Sep-Nov 2014,observe the sample area and the temperature and relative humidity control point from 8:00-18:00 in good weather once a week, in each sample plot were halosols deserts, lawn, hardening of the square, trees covered square four types of space structure.In this paper banded structure of green space and the surrounding urban environment influence on its temperature humidity benefit has been discussed,and then puts forward better solutions.Main conclusions are as follows:1.Greenbelt has significant effect on cooling and humidification.as time goes on, its cooling humidification effect is stronger at noon, in the morning and afternoon is weak,the average maximum temperature and humidity effect at 13:00 and 15:00. Six greenbelt could decrease the temperature ranging from 2.19 ℃ to 3.87 ℃,indecrease relative humidity ranging from 6.95% to 11.25%. Greenbelt can effectively mitigate local severe changes and fluctuations in temperature and relative humidity, temperature and relative humidity in the greenbelt of moment extreme value appeared later than control point, and extreme value is less than the control point of extremum.2.Arbor- shrub- grass, grass, square, trees,four types of spaces overall coolingand humidification effect from large to small is: arbor- shrub- grass > grass > tree square square, arbor- shrub- grass cooling and humidification effect is the strongest, trees square cooling and humidification capacity is close to the lawn, hardening temperature and humidity square benefit is the lowest.Thus can improve human comfort index,create a more suitable for human activity of green space.Four kinds of green space maximum cooling rate are: 2.23℃, 1.67 ℃, 1.24 ℃ and 1.11 ℃, the most in the wet by: 9.45%, 6.45%, 7.08%, 2.89%.3.Situation of road greenbelt,side land covered and the height of the side building volume will have a significant impact on the change of temperature and humidity of the greenbelt. the highest temperature of road-greenbelt in the east is higher than the road-greenbelt on the west side, the minimum relative humidity of the west side greenbelt is lower than the east.The moment of the highest temperature of west side road-greenbelt appears earlier than road-greenbelt in the east. Greenbelt’s side land afforestation rate is high, the daily highest temperature is lower than the lowe afforestation rate greenbelt. Land next to the greenbelt construction group is a low-rise buildings, it’s heating speed and cooling speed is fast,the highest temperature is higher. Land next to the greenbelt construction group is high-rise building,the temperature rise speed and down speed is slow, and the highest temperature is lower.Greenbelt can play a significant role on temperature and humidification,considering from its ecological functions, in order to further develop its ecological benefits, we should increase the green space and the internal structure of composite to improve green quantity. In order to reduce the solar radiation and increase green space cooling and humidification effect, we can put the part of square into a tree covered square. |
PDF Full Text Request