Mapping of total suspended matter based on sentinel-2 data on the Hooghly River, India Premkumar R.*, Venkatachalapathy R., Visweswaran S. Department of Physics, Annamalai University, Annamalai Nagar-608 002, India *E-mail:premkumar140994@gmail.com
Online published on 9 March, 2021. Abstract This study aims to develop a regional algorithm for monitoring and retrieval of total suspended matter concentration (CTSM) using insitu CTSM data, in-situ remote sensing reflectance (Rrs) data and Sentinel 2 MSI data on Hooghly River. The field measurements were carried for 20 stations using Satlantic Hyperspectral Ocean Colour Radiometer (HyperOCR) and water samples were also collected at a depth of 0.5m fromApril to May 2018. The concentration of total suspended matter varies from 132 to 540 mg L-1. The calibration was done for 70% of the data between in-situ CTSM and in-situ remote sensing reflectance and the remaining 30% of the data is used for in-situ validation. The in-situ validation result shows the band combination of B7/B2 has higher fitting. For satellite validation, Sentinel 2 Multispectral Instrument (MSI) satellite data applies to the in-situ validation models to the retrieval of CTSM, which also confirms the band ratio of B7/B2 gives a good correlation with R2 =0.75. The study shows, the applicability of Sentinel 2 MSI data for retrieval of CTSM in Hooghly River, Kolkata. The Sentinel 2 MSI B7/B2 is highly recommended for mapping a higher concentration of suspended matter in the study area, respectively. Top Keywords Total suspended matter, Hyperspectral radiometer, Regional algorithm, Sentinel 2 MSI data, Hooghly river. Top |