Investigating urban heat-related health risks based on local climate zones: A case study of Changzhou in China

城市热岛 环境规划 中国 地理 健康风险 城市气候 城市规划 环境科学 环境卫生 气候学 土木工程 气象学 工程类 地质学 医学 考古
作者
Lei Ma,Guoan Huang,Brian Johnson,Zhenjie Chen,Manchun Li,Ziyun Yan,Wenfeng Zhan,Heng Lü,Weiqiang He,Dongjie Lian
出处
期刊:Sustainable Cities and Society [Elsevier BV]
卷期号:91: 104402-104402 被引量:50
标识
DOI:10.1016/j.scs.2023.104402
摘要

Assessing heat-related health risks is important for sustainable urban development. Although fine-scale information (e.g., at the community/neighborhood or city block level) is ideal for identifying and mitigating these risks, previous studies have preferred to work at the administrative unit level. High-resolution Local Climate Zone (LCZ) maps, i.e., maps of urban “zones” with different microclimates, could help to standardize the analyzing units. In this study, we proposed an LCZ-based risk assessment approach for this purpose. First, an LCZ map of the study site (Changzhou, China) was generated using multisource big data and machine-learning techniques. Next, Crichton's Risk Triangle framework, based on the hazard-exposure-vulnerability risk components, was employed to estimate heat-related health risks. Finally, the relationship between LCZ types and heat-related health risk levels was quantitatively analyzed in detail. The results indicated that at least 60% of LCZ1-5 (compact high-/mid-/low-rise, open high-/mid-rise areas) were designated as high-risk areas, while heat hazard mitigation and climate adaptation strategies in urban planning would benefit more from LCZ 6 (open low-rise). This study, based on the LCZ concept, shows the risk difference at the community level, and can be used for informing and implementing area-level urban planning strategies. It could contribute to global heat-related health risk analysis, since the LCZ is a globally consistent system for urban microclimate analysis.
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