ISSN 1006-8775CN 44-1409/P

    Different Greening Schemes for Numerical Simulation Research on Summer Thermal Environment in Guangzhou Campus

    • Reasonable greening design can effectively alleviate campus heat environment issues. This study uses the ENVI-met numerical model, along with in-situ observations and simulations, to analyze the thermal environment under three different greening schemes in typical areas of the Guangzhou University campus. The results indicate that the outdoor thermal environment is significantly influenced by the underlying surface materials and vegetation. The temperature of brick-paved surface is 0.9 ℃ higher than that of natural soil surfaces under tree shade. Numerical simulations further confirm that increasing vegetation coverage effectively reduces outdoor air temperature. When the greening rate increases to 40%, the outdoor average temperature decreases by 0.7 ℃ and relative humidity increases by approximately 4%, while wind speed remains minimal change. The cooling effect of vegetation is found to extend vertically to an altitude of 13 m. As the greening rate increases from 15% to 40%, the Mean Radiant Temperature (MRT) decreases from 50.6 ℃ to 28.9 ℃, which is lower than the average ambient temperature, indicating improved thermal conditions. The Physiological Equivalent Temperature (PET) decreases from 40.2 ℃ to 30.0 ℃, with the proportion of the areas classified as ″very hot″ reducing by 36.8%, significantly improving thermal comfort across most areas. Therefore, changing the ground material and greening landscape design can effectively alter the outdoor wind and thermal environment of the campus, thereby enhancing the thermal comfort for the campus community.
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