上海城市典型林荫道夏季温湿效应

选择上海市6条不同覆盖率的城市林荫道作为研究对象,7：00~19：00每2h对样地样点和对照点的温度、相对湿度进行同步测定,连续测定12h。以无林荫覆盖道路为对照,分析城市林荫道的覆盖率、树种与环境温度和相对湿度之间的关系,为城市林荫道的建设管理提供科学依据。结果显示,6个时间段林荫道均表现出降温增湿效应;覆盖率与林荫道降温增湿效应成正相关关系,即林荫道的降温增湿能力随着覆盖率的增加而增强;作为林荫道行道树树种,香樟比悬铃木的降温增湿能力更强。

Research on Temperature and Humidity of Shanghai Typical Urban Green Streets in Summer

In order to provide a scientific basis for urban construction and management of the urban green streets, the effects of the different coverage and species of urban green streets on the temperature and relative humidity were analyzed by comparing with non-tree-lined roads. In this paper, six urban green streets with different coverage in downtown Shanghai were investigated. The air temperature and relative humidity in six urban green streets were measured once every two hours from 7.00 to 19：00 every day for several days. The results showed that the urban green streets exhibited temperature decreasing and humidification effect in the six time periods. The ability of decreasing temperature and increasing humidification advantages improved with the increase of coverage rate. As green street trees, Camphor has stronger ability of temperature decreasing and humidification than Sycamore.