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<p>Coastal sand dunes play a crucial role in shoreline dynamics and ecosystem services, yet comprehensive morphometric analyses of these features are often lacking in many regions. This study presents a detailed morphometric analysis of sand dunes along the Tamil Nadu coast, India, utilizing high-resolution Airborne Laser Terrain Mapping (ALTM) data. The research methodology eliminated traditional manual measurements by employing advanced remote sensing techniques, ensuring greater accuracy and comprehensive spatial coverage. The study encompassed multiple coastal districts, providing insights into dune height distributions and volumetric characteristics across various elevation ranges, which will act as a coastal bioshield during hazards. ALTM data was processed to generate detailed digital elevation models, from which dune heights and volumes were extracted. The analysis revealed significant variations in dune morphology along the coast, with Kancheepuram district exhibiting the most diverse dune profile and Viluppuram hosting the tallest dunes. The majority of sand volume was concentrated in lower height ranges across all districts, with substantial variations in total dune area coverage between districts. This spatial heterogeneity likely reflects the interplay of local geological, oceanographic, and anthropogenic factors. The study provides a comprehensive baseline for understanding dune morphology along the Tamil Nadu coast, offering valuable insights for coastal management strategies, erosion studies, and environmental planning.</p>

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Sand Dune Morphometric Analysis on Southeast Indian Coast Using Airborne Laser Terrain Mapping Data

  • 期刊论文

  • 发表日期：

    2026年2月12日

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  • Mayamanikandan Thangavelu,
  • Tune Usha,
  • S. K. Dash,
  • K. N. Reshma,
  • Jeffy Soly John,
  • S. K. Raju,
  • M. V. Ramana Murthy

摘要

Coastal sand dunes play a crucial role in shoreline dynamics and ecosystem services, yet comprehensive morphometric analyses of these features are often lacking in many regions. This study presents a detailed morphometric analysis of sand dunes along the Tamil Nadu coast, India, utilizing high-resolution Airborne Laser Terrain Mapping (ALTM) data. The research methodology eliminated traditional manual measurements by employing advanced remote sensing techniques, ensuring greater accuracy and comprehensive spatial coverage. The study encompassed multiple coastal districts, providing insights into dune height distributions and volumetric characteristics across various elevation ranges, which will act as a coastal bioshield during hazards. ALTM data was processed to generate detailed digital elevation models, from which dune heights and volumes were extracted. The analysis revealed significant variations in dune morphology along the coast, with Kancheepuram district exhibiting the most diverse dune profile and Viluppuram hosting the tallest dunes. The majority of sand volume was concentrated in lower height ranges across all districts, with substantial variations in total dune area coverage between districts. This spatial heterogeneity likely reflects the interplay of local geological, oceanographic, and anthropogenic factors. The study provides a comprehensive baseline for understanding dune morphology along the Tamil Nadu coast, offering valuable insights for coastal management strategies, erosion studies, and environmental planning.