Comprehensive Evaluation of Varied Healthcare Factors in Different Green Activity Spaces of A Campus
To provide a scientific basis for using varied characteristics of healthcare factors in different green activity spaces of a campus,in South China,a field study was conducted on campus of South China Agricultur-al University in autumn(September and October).Healthcare factors of five types of activity green spaces were observed synchronously.The results showed that the diurnal variation of microclimate in the five spaces showed an inverted'V'shape.The square type was at the level of grade Ⅲ discomfort,the other four spaces all reached the level of grade Ⅱ comfort.The diurnal variation of negative air ions showed a'double peak'shape,with the concentration of negative air ions in the arboretum space reaching grade Ⅳ healthcare concentration,and the other four spaces all reached the level of grade Ⅴ.The diurnal variation of air particulate matter(PM2.5 and PM10)concentrations in the five spaces showed a'U'shaped variation and the arboretum space reached the ambient air quality level Ⅰ standard.The comprehensive healthcare function of different spaces is in a descending order of arboretum type>water type>street tree type>lawn type>square type.According to the observation results,the healthcare function of the arboretum-type space reaches its peak at 10:00 AM and 4:00 PM to 6:00 PM,it is recommended that campus teachers and students go to the arboretum-type space with high shade during this period.
campus green spacevariation characteristicscomprehensive health evaluationhuman comfort indexair negative ion concentrationair particulate matter concentration
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