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The Regulating Effect of Urban Large Planar Water Bodies on Residential Heat Islands: A Case Study of Meijiang Lake in Tianjin

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  • Liuying Wang

    (School of Architecture, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

  • Gaoyuan Wang

    (School of Architecture, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

  • Tian Chen

    (School of Architecture, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

  • Junnan Liu

    (School of Architecture, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

Abstract

Efficiently harnessing the urban cool island effect associated with large urban aquatic bodies holds significant importance in mitigating the urban heat island (UHI) effect and enhancing the quality of residential living. This study focuses on Tianjin’s Meijiang Lake and its surrounding 47 residential areas, combining Landsat 8 remote sensing satellite data with geographic information system (GIS) buffer analyses and multiple linear regression analyses to reveal the summer thermal characteristics of residential waterfront areas with diverse spatial layouts. The results indicate that: (1) Meijiang Lake’s effective cooling radius extends up to 130 m from the water’s edge, achieving a maximum temperature reduction of 14.44%. Beyond 810 m, the cooling effect diminishes significantly. (2) Waterfront distance ( WD ), building density ( BD ), building width ( L ) and normalized difference vegetation index ( NDVI ) emerge as the primary factors influencing changes in average land surface temperature (Δ LST ) in residential areas. The degrees of influence are ordered as follows: BD > WD > NDVI > L . “Dispersed” pattern residential areas exhibit the most favorable thermal environments, which are primarily influenced by WD , while “parallel” pattern residential areas demonstrate the least favorable conditions, primarily due to WD and NDVI . (3) The direct adjacency of residential areas to large-scale aquatic bodies proves to be the most effective approach for temperature reduction, resulting in a 5.03% lower average temperature compared to non-adjacent areas. Consequently, this study derives strategies for improving the thermal environment via the regulation of spatial planning elements in residential areas, including waterfront patterns, vegetation coverage, WD , and BD .

Suggested Citation

  • Liuying Wang & Gaoyuan Wang & Tian Chen & Junnan Liu, 2023. "The Regulating Effect of Urban Large Planar Water Bodies on Residential Heat Islands: A Case Study of Meijiang Lake in Tianjin," Land, MDPI, vol. 12(12), pages 1-22, December.
    • Handle: RePEc:gam:jlands:v:12:y:2023:i:12:p:2126-:d:1292198
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    References listed on IDEAS

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    1. Jamei, Elmira & Rajagopalan, Priyadarsini & Seyedmahmoudian, Mohammadmehdi & Jamei, Yashar, 2016. "Review on the impact of urban geometry and pedestrian level greening on outdoor thermal comfort," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 1002-1017.
    2. Zheming Liu & Yumeng Jin & Hong Jin, 2019. "The Effects of Different Space Forms in Residential Areas on Outdoor Thermal Comfort in Severe Cold Regions of China," IJERPH, MDPI, vol. 16(20), pages 1-20, October.
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