Experimental investigation of the thermal usability of outdoor environments in rideability, walkability, entertainmentability, exercisability and workability for urban heat mitigation, adaptation and governance

Boze Huang, Xin Dong, Yu Tian, Mingqiang Yin, Yufeifei Qiu and Bao-Jie He ()
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Boze Huang: Chongqing University
Xin Dong: Chongqing University
Yu Tian: Chongqing University
Mingqiang Yin: Chongqing University
Yufeifei Qiu: Chongqing University
Bao-Jie He: Chongqing University

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2024, vol. 120, issue 2, No 39, 2005-2034

Abstract: Abstract This study develops a quantitative method to assess the thermal usability (e.g., rideability, walkability, entertainmentability, exercisability and workability) of outdoor spaces. The benchmark for thermal usability was assessed by four widely used indicators [wet bulb globe temperature (WBGT), predicted mean vote (PMV), physiologically equivalent temperature (PET) and universal thermal climate index (UTCI)]. Among these five dimensions of thermal usability, exercisability was the most significantly thermally affected, as most of the exercise activities are moderately loaded and heavily loaded, and the exercisability of moderately loaded and heavily loaded would be lower than 33% and 24%, respectively, at WBGT above 30 °C. An empirical study based on field experiments in Changzhou, China, was performed. The results indicated that the quantitative method was capable of assessing the thermal usability of various urban spaces (e.g., basketball court, badminton field, walkway space and natural lawn), and could guide people in spatial modifications, outdoor activities and site management. The empirical studies also showed that airflow and radiation were the two critical meteorological factors, associated with urban infrastructure affecting the thermal usability of outdoor spaces. Activity metabolism showed a positive correlation with participant’s heat stress and a negative correlation with the thermal usability. Suggestions were used to guide participants to avoid optional activities and to provide them protective recommendations for necessary activities during periods of low thermal usability. Overall, this paper promotes methodological understandings of thermal usability, and provides policy makers, urban planners and designers, and urban managers with implications on effective heat solutions.

Keywords: Thermal usability; Heat stress; Heat resilience; Urban heat mitigation; Public heat adaptation; Heat governance (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s11069-023-06266-6

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