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<p>Suspended sediment concentration (SSC) in coastal waters and estuaries constitutes a critical factor impacting the aquatic environment, affecting primary productivity and ecosystem health. Accurate SSC estimation remains crucial for managing and assessing these ecosystems. Remote sensing methods have been developed to capture the spatial variability of SSC, using Ocean Colour Monitor (OCM with 360&#xa0;m), Moderate Resolution Imaging Spectroradiometer (MODIS 250&#xa0;m), and Sea-viewing Wide Field-of-view Sensor (SeaWiFS 4000&#xa0;m), but their spatial resolution has a significant role in monitoring SSC in coastal and estuarine waters. The Advanced Wide Field Sensor (AWiFS) onboard ResourceSAT- 2/2A, an Indian satellite with a spatial resolution of 56&#xa0;m, is used in this study to monitor the SSC dynamics in the central west coast of India and its estuaries. The in-situ measurements were collected for possible satellite pass dates between October 2020 and December 2022 using a laser-based instrument for particle size distribution and concentration. A matchup of up to 13 images from the time period mentioned was used to validate the satellite-derived SSC. The comparison from the available matchups showed a strong positive correlation (R<sup>2</sup> = 0.89) between satellite-derived and in-situ SSC, proving AWiFS’s veracity in estimating SSC. This study highlights the potential of AWiFS for SSC estimation in coastal and estuarine waters, providing valuable information for coastal and estuarine research and sustainable ecosystem management.</p>

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A Refined Regional Algorithm for Estimating Suspended Sediment Concentration in Coastal and Tropical Estuarine Waters Along the Central West Coast of India Using AWiFS Data

  • 期刊论文

  • 发表日期：

    2026年4月4日

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  • S. Santhosh Kumar,
  • R. Mani Murali,
  • Ratheesh Ramakrishnan,
  • Murali Krishnam Raju,
  • Jaya Kumar Seelam

摘要

Suspended sediment concentration (SSC) in coastal waters and estuaries constitutes a critical factor impacting the aquatic environment, affecting primary productivity and ecosystem health. Accurate SSC estimation remains crucial for managing and assessing these ecosystems. Remote sensing methods have been developed to capture the spatial variability of SSC, using Ocean Colour Monitor (OCM with 360 m), Moderate Resolution Imaging Spectroradiometer (MODIS 250 m), and Sea-viewing Wide Field-of-view Sensor (SeaWiFS 4000 m), but their spatial resolution has a significant role in monitoring SSC in coastal and estuarine waters. The Advanced Wide Field Sensor (AWiFS) onboard ResourceSAT- 2/2A, an Indian satellite with a spatial resolution of 56 m, is used in this study to monitor the SSC dynamics in the central west coast of India and its estuaries. The in-situ measurements were collected for possible satellite pass dates between October 2020 and December 2022 using a laser-based instrument for particle size distribution and concentration. A matchup of up to 13 images from the time period mentioned was used to validate the satellite-derived SSC. The comparison from the available matchups showed a strong positive correlation (R2 = 0.89) between satellite-derived and in-situ SSC, proving AWiFS’s veracity in estimating SSC. This study highlights the potential of AWiFS for SSC estimation in coastal and estuarine waters, providing valuable information for coastal and estuarine research and sustainable ecosystem management.