Mechanism of Three-dimensional Green Space Affecting Air Temperature and Humidity in Urban Residential Area
The handheld Luchang LM-8000 multi-functional environment measurement instrument was used to observe the microclimate environment of six urban residential areas with different directions,heights and layout forms in Zhengzhou City,meteorological data such as temperature and relative humidi-ty were analyzed,and the mechanism by which green space layout forms affected air temperature and hu-midity was explored.The results showed that the variation amplitude of relative humidity during the day in residential areas was higher than that of temperature;the time when the temperature and humidity reached the maximum value was different between high-rise buildings and multi-story buildings;under calm wind conditions,the range of plant evapotranspiration and shadow influence was 10-50 meters,and the range of relative humidity influence was 10-50 meters;the minimum and average relative humidity in residential areas were related to the fractal dimension of the green space within a range of 10 meters from the measurement point;the maximum relative humidity was related to the shape index of green space within a range of 50 meters;the variation of humidity during the day was related to the shape index and connectivity index within a range of 50 meters.
microclimategreen space layoutfractal dimensionshape indextemperature and humidity