Study on the Characteristics of Urban Space Thermal Environment and the Evaluation of Crowd Thermal Comfort during the High-Temperature Heatwave:A Case Study of Yuzhong District,Chongqing
Addressing the issue of heatwaves in high-density urban spaces,this study examines the core urban area of Yuzhong district in the mountainous city of Chongqing as a case.It measures four types of typical urban functional spaces—commercial areas,residential areas,mountain parks,and riverfront parks—during a heat wave cycle.The study compares the characteristics of high-temperature heat waves across different urban spaces by analyzing thermal environmental parameters such as air temperature,surface temperature,relative humidity,and solar thermal radiation.Furthermore,incorporating questionnaire research on urban population heat comfort,the physiological equivalent temperature(PET)is used to quantify the heat sensation of the human body.This approach helps in identifying the elements and patterns that influence population heat comfort during heat waves in urban spaces and in establishing a predictive model for outdoor heat comfort in summer.The findings indicate that:high-temperature heat waves are influenced by urban spatial elements and exhibit distinct characteristics,with severe heat waves in older residential areas,followed by commercial areas,while park green spaces fare better.Outdoor thermal comfort is closely linked to spatial elements.PET,air temperature,and surface temperature are significantly negatively correlated with thermal sensation and comfort.Conversely,relative humidity has a significantly positive correlation with these factors.Air temperature and thermal radiation notably affect thermal comfort,whereas relative humidity and surface temperature have a comparatively minor impact.Reasonable spatial forms and shading plans,along with the presence of vegetation,water bodies,and materials with high thermal mass,can mitigate high-temperature heat waves,lower the thermal neutral temperature,and enhance thermal comfort.
mountainous high-density citieshigh-temperature heat wavethermal environmentthermal comfortfunctional urban space
万方数据
