JAUE2024-030: Effect of Different Waterfront Green Space Areas on the Internal Center Site

Abstract

Urban blue-green infrastructure (UBGI) comprises water bodies and green vegetation. In summer, UBGI can effectively mitigate the urban heat island. However, in UBGI, the effective surrounding green space extent that significantly impacts the thermal environment at one green space interest site has not yet been obtained. This study conducted the numerical simulation on one representative UBGI space in a cold region of China, based on different greenery scenarios with various greenery space radiuses. The results showed that the cooling and humidifying effects of green spaces with all radiuses were low at 9:00. Over time, the cooling effect gradually increased, peaked, and decreased. The peak occurred between 15:00 and 16:00. The air temperature and relative humidity at the interest site were significantly affected by the surrounding greenery within 6 m. At a radius of 0-6 m, green space had a cooling effect of 0.22°C per 50m² of area; At a radius greater than 6 m, green space had a cooling effect of only 0.05°C per 50m² of area. At a radius of 0-6 m, green space had a humidifying effect of 0.70% per 50m² of area; At a radius greater than 6 m, green space had a humidifying effect of only 0.19% per 50m² of area. This study provides scientific guidance and reference for the planning and redevelopment of urban blue-green infrastructure.