Abstract
These days, high-density cities are facing growing challenges related to the urban heat island (UHI) effect. Greening can be a nature-based solution for UHI effect mitigation. This study aims to evaluate the potential of nature-based solutions to improve the urban living environments in Baishizhou, a high-density neighbourhood in Shenzhen. An integrated 3D visualisation research method was proposed in this study. Rhino 7, Grasshopper, and ENVI-met software were combined to evaluate environment characteristics before and after design, as well as compare differences in the outdoor thermal comfort index and the building surface temperature. The greening design scenarios include adding trees, green roofs, and green facades. The simulations ran for 24 h during the test period from 01:00 to 24:00 on 9 August 2019, which was the hottest day in Shenzhen. Baishizhou was selected as the test area for this study and environmental simulation. Results indicated that (1) vegetation has a positive cooling effect, providing outdoor thermal comfort, while shade “trees” provide significant cooling effects on hot days in tropical and subtropical climates; (2) adding green roofs and green facades to a building can significantly affect the cooling effect.
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