Research on Outdoor Thermal Comfort of Children's Activity Space in High-Density Urban Residential Areas of Chongqing in Summer

Children's activity spaces in communities designed for children's recreation are related to children's safety and physical health. Outdoor thermal comfort of children's activity spaces in high-density urban residential areas is the key to children's use in summer. To this end, meteorological measurements and questionnaires were conducted to better understand children's outdoor thermal comfort in summer, and children's outdoor thermal comfort was evaluated using the universal thermal climate index (UTCI) for children's activity spaces in high-density residential areas of Chongqing, China. We draw four conclusions: (1) Different landscape types of children's activity spaces have different effects on outdoor thermal comfort, and gender differences also affect outdoor thermal comfort in the same type of children's activity space. (2) Global radiation (G) and air temperature (Ta) were the primary meteorological factors influencing children's thermal sensations. (3) Outdoor thermal comfort of children's activity spaces in high-density urban residential areas was inferior overall. (4) Neutral UTCI (NUTCI) for male and female children in Chongqing were 22.2 degrees C and 21.8 degrees C, NUTCI ranges (NUTCIR) were 18.4-26.1 degrees C (male) and 16.2-27.3 degrees C (female), and acceptable UTCI ranged from 23.2 to 39.1 degrees C (male) and 22.8 to 40.3 degrees C (female). The results provide guidance for landscape architects and urban planners in the Chongqing area to create comfortable outdoor spaces for children, improve their physical activity levels, and promote their physical and mental health.