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Spatiotemporal Changes in the Built Environment Characteristics and Urban Heat Island Effect in a Medium-Sized City, Chiayi City, Taiwan

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  • Jou-Man Huang

    (Department of Landscape Architecture, National Chiayi University, Chiayi City 60004, Taiwan)

  • Heui-Yung Chang

    (Department of Civil and Environmental Engineering, National Kaohsiung University, Kaohsiung City 81148, Taiwan)

  • Yu-Su Wang

    (Department of Civil and Environmental Engineering, National Kaohsiung University, Kaohsiung City 81148, Taiwan)

Abstract

This study took Chiayi City—a tropical, medium-sized city—as an example to investigate the urban heat island (UHI) effect using mobile transects and built environment characteristics in 2018. The findings were compared to those from a study in 1999 to explore the spatiotemporal changes in the built environment characteristics and UHI phenomenon. The result for the UHI intensity (UHII) during the day was approximately 4.1 °C and at midnight was approximately 2.5 °C. Compared with the survey in 1999, the UHII during the day increased by approximately 1.3 °C, and the UHII at midnight decreased by approximately 1.2 °C. The trend of the spatial distribution of the increasing artificial area ratio (AAR) proved the importance of urban land use expansion on UHI. The results of the air temperature survey were incorporated with the nesting space in GIS to explore the role of built environment characteristics in UHI effects. The higher the population density (PD) and artificial area ratio (AAR) were, the closer the proximity was to the downtown area. The green area ratio (GAR) was less than 0.2 in the downtown area and increased closer to the rural areas. The built environment factors were analyzed in detail and correlated with the UHI effect. The air temperature in the daytime increased with the population density (PD) and artificial area ratio (AAR), but decreased with the green area ratio (GAR) (r = ±0.3–0.4). The result showed good agreement with previous studies.

Suggested Citation

  • Jou-Man Huang & Heui-Yung Chang & Yu-Su Wang, 2020. "Spatiotemporal Changes in the Built Environment Characteristics and Urban Heat Island Effect in a Medium-Sized City, Chiayi City, Taiwan," Sustainability, MDPI, vol. 12(1), pages 1-16, January.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:1:p:365-:d:304457
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    References listed on IDEAS

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    1. Henderson, Vernon, 1997. "Medium size cities," Regional Science and Urban Economics, Elsevier, vol. 27(6), pages 583-612, November.
    2. Thi Mai Nguyen & Tang-Huang Lin & Hai-Po Chan, 2019. "The Environmental Effects of Urban Development in Hanoi, Vietnam from Satellite and Meteorological Observations from 1999–2016," Sustainability, MDPI, vol. 11(6), pages 1-24, March.
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    Cited by:

    1. Taher Safarrad & Mostafa Ghadami & Andreas Dittmann & Mousa Pazhuhan (Panahandeh Khah), 2021. "Tourism Effect on the Spatiotemporal Pattern of Land Surface Temperature (LST): Babolsar and Fereydonkenar Cities (Cases Study in Iran)," Land, MDPI, vol. 10(9), pages 1-25, September.
    2. Taher Safarrad & Mostafa Ghadami & Andreas Dittmann, 2022. "Effects of COVID-19 Restriction Policies on Urban Heat Islands in Some European Cities: Berlin, London, Paris, Madrid, and Frankfurt," IJERPH, MDPI, vol. 19(11), pages 1-25, May.
    3. Ghali Abdullahi Abubakar & Jiexia Wu & Amir Reza Shahtahmassebi & Ke Wang, 2020. "Necessity of a Multifaceted Approach in Analyzing Growth of Impervious Surfaces," Sustainability, MDPI, vol. 12(10), pages 1-22, May.
    4. Jou-Man Huang & Heui-Yung Chang & Liang-Chun Chen & Yu-Su Wang, 2021. "Canopy-scale Built-environment Characteristics and Urban Heat Island Effect in a Tropical Medium-sized City," Sustainability, MDPI, vol. 13(2), pages 1-17, January.
    5. Patryk Antoszewski & Michał Krzyżaniak & Dariusz Świerk, 2022. "The Future of Climate-Resilient and Climate-Neutral City in the Temperate Climate Zone," IJERPH, MDPI, vol. 19(7), pages 1-60, April.
    6. Jou-Man Huang & Liang-Chun Chen, 2020. "A Numerical Study on Mitigation Strategies of Urban Heat Islands in a Tropical Megacity: A Case Study in Kaohsiung City, Taiwan," Sustainability, MDPI, vol. 12(10), pages 1-21, May.

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