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Assessing Urban Flood Risk in Thoothukudi City: A GIS and Remote Sensing-based Approach to Climate Change

Author

Listed:
  • Richard Abishek S

    (V.O. Chidambaram College)

  • Antony Ravindran A

    (V.O. Chidambaram College)

  • Stephen Pitchaimani V

    (V.O. Chidambaram College)

  • Velmurugan P

    (V.O. Chidambaram College)

  • Sakthi Priya R

    (V.O. Chidambaram College)

  • Haris S

    (V.O. Chidambaram College)

  • Nishamangai G

    (V.O. Chidambaram College)

Abstract

This study evaluates flood susceptibility in Thoothukudi city using Remote Sensing (RS) and Geographic Information Systems (GIS) to assess the impact of land use and land cover (LULC), vegetation health, rainfall, topography, and urbanization. Various datasets, including LANDSAT-8 imagery, Normalized Difference Vegetation Index (NDVI), Topographic Wetness Index (TWI), Land Surface Temperature (LST), and Digital Elevation Model (DEM), were integrated to generate a Flood Susceptibility Index (FSI). The findings highlighting the significant temporal and seasonal misalignments between LULC and climatic factors, particularly rainfall, which influence flood risks. LULC analysis revealed that Thoothukudi is mainly covered by crop land (34%), built-up areas (19.1%), and rangeland (36.4%), with minimal water bodies and bare soil. NDVI values indicated sparse vegetation in many areas, contributing to higher runoff. TWI analysis showed that some regions have lower moisture retention, exacerbating runoff during rainfall. LST data demonstrated rising surface temperatures, potentially intensifying the urban heat island effect and increasing flood risks. The study also calculated the volume of water discharge, which varied across different classifications, based on rainfall of 392.53 mm. “Very High” susceptibility areas had the largest water discharge (13.77 million cubic meters), while "Low" susceptibility zones showed the least (32.62 million cubic meters), due to better vegetation cover and water retention. The study emphasizes the importance of incorporating multi-layer environmental data for effective flood management and sustainable urban planning in Thoothukudi.

Suggested Citation

  • Richard Abishek S & Antony Ravindran A & Stephen Pitchaimani V & Velmurugan P & Sakthi Priya R & Haris S & Nishamangai G, 2025. "Assessing Urban Flood Risk in Thoothukudi City: A GIS and Remote Sensing-based Approach to Climate Change," Economics of Disasters and Climate Change, Springer, vol. 9(2), pages 263-287, July.
    • Handle: RePEc:spr:ediscc:v:9:y:2025:i:2:d:10.1007_s41885-025-00169-5
    DOI: 10.1007/s41885-025-00169-5
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    References listed on IDEAS

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    1. Richard Abishek Selvam & Antony Ravindran Antony Jebamalai, 2023. "Application of the analytical hierarchy process (AHP) for flood susceptibility mapping using GIS techniques in Thamirabarani river basin, Srivaikundam region, Southern India," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 118(2), pages 1065-1083, September.
    2. Nigel Arnell & Simon Gosling, 2016. "The impacts of climate change on river flood risk at the global scale," Climatic Change, Springer, vol. 134(3), pages 387-401, February.
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