摘要
以北京居住区绿地为研究对象,对不同规模、不同结构绿地的夏季空气温度、相对湿度、舒适度等进行定量化研究,结果表明,1)面积<1hm2的北京居住区绿地夏季昼平均降温1.43℃,昼平均增湿3.49%,并伴随绿地规模的增大,降温增湿作用增强;2)夏季不同结构绿地的降温增湿效应和人体舒适程度大体呈现出乔-灌-草型绿地>乔-草型绿地>草地≈裸地的特征;3)在<9m的垂直高度,14:00~16:00为居住区绿地每日高温低湿时段,5:00~6:00为低温高湿时段;伴随着高度的升高,乔-灌-草型和乔-草型绿地的日均和高温低湿时段空气温度大体呈上升趋势,相对湿度呈下降趋势,草坪和裸地变化相对平缓。
Taking the green spaces in residential areas of Beijing as investigation objects, effects of the spaces with different scales and structures on the micro climatic elements in summer were quantitatively analyzed, including air temperature, relative humidity and human body comfort index. The results showed that 1） green space less than 1 hectare could decrease the air temperature with an average of 1.43℃ and increase the relative humidity by 3.49% daily in summer,and the effects became stronger with the increase of the area of green spaces. 2） The order of decreasing temperature and increasing relative humidity and human body comfort for the green spaces with different structures was tree-shrub-grass 〉tree-grass 〉lawn≈bare land. 3） Within the height less than 9m above the ground, the daily maximum temperature and minimum relative humidity occurred in 14：00--16：00 ,and minimum temperature and maximum relative humidity oc- curred in 5：00--6：00. Along with the increase of the height （more than 9 m） ,the daily mean temperature increased and relative humidity decreased in the green spaces with the structures of tree-shrub-grass and tree-grass, and with little changes in the lawn and the bare land structures.
出处
《西北林学院学报》
CSCD
北大核心
2017年第6期289-295,共7页
Journal of Northwest Forestry University
基金
北京市科技计划重大项目(D171100001817001)
国家“十二五”科技支撑项目(2013BAJ02B01)
关键词
降温增湿效应
居住区绿地
规模
结构
北京
cooling and humidifying effect
green space of residential district
scale
structure
Beijing
