| 摘要: |
| 城市街道作为城市最重要的活动空间，对其进行合
理的规划和改造有利于改善城市热环境。揭示街道可视因子对
街道峡谷微气候和热舒适度的作用机制，可以作为城市规划设
计的理论基础。选取杭州市典型街道峡谷为研究对象，通过
实测和数据分析发现，在夏季午后，不同街道峡谷内微气候和
热舒适度存在明显差异：各街道峡谷之间空气温度、平均辐
射温度和生理等效温度最大值与最小值之差分别达到了2.9、
25.3和15.3℃；N-S朝向的街道热环境优于E-W朝向的街
道，但街道的开敞程度和植物遮阴会抵消街道朝向的影响。研
究也发现，在午后，街道可视因子会对街道峡谷热环境产生不
同程度的影响，天空可视因子越高，街道峡谷空间越开敞，街
道热环境和热舒适度越差；建筑可视因子与城市街道峡谷微气
候和热舒适度相关性不大；而树木可视因子则对街道峡谷热环
境具有重要影响，树木可视因子越高，街道树木的遮阴程度越
高，街道内热环境和热舒适度越佳，这种现象在E-W朝向的
街道峡谷中表现得更为明显。 |
| 关键词: 风景园林 天空可视因子 建筑可视因子 树木
可视因子 街道峡谷 微气候 热舒适度 |
| DOI： |
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| 基金项目: |
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| Influence of Street View Factors on Microclimate and Thermal Comfort of Urban Street Canyons in Summer Afternoon |
| GUO Xiaohui,BAO Zhiyi,WU Fan,YANG Shimin,YAN Hai |
| Abstract: |
| As the most important activity space of city, urban
streets are rationally planned and reconstructed to improve the urban
microclimate. Revealing the mechanism of street view factors on the
microclimate and thermal comfort of street canyons can be used as
the theoretical basis for urban planning and design. This study selects
typical street canyons in Hangzhou as the research object. Through
actual measurement and data analysis, it is found that there are obvious
differences in microclimate and thermal comfort in different street
canyons in the summer afternoon. The results show that in the summer
afternoon, even in small-scale urban blocks, there are significant
difference in microclimate and thermal comfort in each street canyon.
The difference between the maximum and minimum values of air
temperature, mean radiation temperature and physiological equivalent
temperature between the street canyons reached 2.9, 25.3, and 15.3℃,
respectively. The N-S orientation street canyons’ thermal environment
tends to be superior to the E-W orientation street canyon, but the
openness of the street canyon and tree shading can offset the impact
of street orientation. At the same time, the study also find that the
street view factors have different influence on the street canyon. The
higher the sky view factor, the more open the street canyon space, and
the worse the thermal environment and thermal comfort in the street
canyon. Building view factor is less relevant to the microclimate and
thermal comfort of urban street canyons. The higher the tree view
factor, the higher the shade of the trees and the better the thermal
environment and thermal comfort in the street. This phenomenon is
more pronounced in the E-W orientation street canyons. |
| Key words: landscape architecture sky view factor building view
factor tree view factor urban street canyon microclimate thermal
comfort |
