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<p>This study investigates the spatiotemporal evolution of Urban Heat Island (UHI) patterns in Thoothukudi Municipal Corporation, a rapidly emerging coastal industrial hub in Tamil Nadu, India, over the critical development period 2015–2024. The research aims to quantify thermal intensification patterns and their relationships with land use changes to inform evidence-based urban planning strategies. The analysis employed Landsat 8 OLI/TIRS satellite data for three temporal periods (2015, 2020, 2024) to derive Land Surface Temperature (LST) and calculate four spectral indices (Normalized Difference Built-up Index (NDBI), Normalized Difference Bareness Index (NDBaI), Normalized Difference Vegetation Index (NDVI) and Normalized Difference Water Index (NDWI). Statistical correlation analysis and systematic UHI intensity zonation were performed to quantify thermal-land use relationships and identify hotspot zones. Results revealed substantial thermal intensification with mean LST increasing by 4.42&#xa0;°C from 26.48&#xa0;°C (2015) to 30.90&#xa0;°C (2024), coinciding with dramatic urban morphological changes where high-density built-up areas expanded from 4.49% to 33.16%. Statistical analysis demonstrated strengthening correlation between LST and built-up density (R² = 0.4412, <i>p</i> &lt; 0.001), while Very Strong UHI zones expanded by 160% and were concentrated around industrial clusters. The findings provide critical evidence for implementing targeted thermal management strategies in coastal industrial cities, including mandatory thermal corridors, built-up density thresholds and industrial cooling requirements. This research offers a replicable methodological framework for similar rapidly industrializing coastal regions globally and supports sustainable urban planning policies for climate resilience.</p>

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Decadal dynamics of urban heat Islands in a coastal industrial region of india: remote sensing insights for sustainable urban planning

  • 期刊论文

  • 发表日期：

    2025年12月18日

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  • C Antony Zacharias Grace,
  • John Prince Soundranayagam,
  • Neelam Sidhu,
  • Sahil Sharma,
  • Ernest Amita Roy,
  • V Stephen Pitchaimani,
  • A Antony Alosanai Promilton

摘要

This study investigates the spatiotemporal evolution of Urban Heat Island (UHI) patterns in Thoothukudi Municipal Corporation, a rapidly emerging coastal industrial hub in Tamil Nadu, India, over the critical development period 2015–2024. The research aims to quantify thermal intensification patterns and their relationships with land use changes to inform evidence-based urban planning strategies. The analysis employed Landsat 8 OLI/TIRS satellite data for three temporal periods (2015, 2020, 2024) to derive Land Surface Temperature (LST) and calculate four spectral indices (Normalized Difference Built-up Index (NDBI), Normalized Difference Bareness Index (NDBaI), Normalized Difference Vegetation Index (NDVI) and Normalized Difference Water Index (NDWI). Statistical correlation analysis and systematic UHI intensity zonation were performed to quantify thermal-land use relationships and identify hotspot zones. Results revealed substantial thermal intensification with mean LST increasing by 4.42 °C from 26.48 °C (2015) to 30.90 °C (2024), coinciding with dramatic urban morphological changes where high-density built-up areas expanded from 4.49% to 33.16%. Statistical analysis demonstrated strengthening correlation between LST and built-up density (R² = 0.4412, p < 0.001), while Very Strong UHI zones expanded by 160% and were concentrated around industrial clusters. The findings provide critical evidence for implementing targeted thermal management strategies in coastal industrial cities, including mandatory thermal corridors, built-up density thresholds and industrial cooling requirements. This research offers a replicable methodological framework for similar rapidly industrializing coastal regions globally and supports sustainable urban planning policies for climate resilience.