Estimation of Above Ground Biomass with Synthetic Aperture Radar (SAR) Data in Lothian Island, Sundarbans, India

The present study deals with the estimation of aboveground biomass (AGB) using synthetic aperture radar (SAR) data in a highly complex mangrove assemblage of Lothian Island, Indian Sundarbans. A comparative analysis between the SAR datasets was also performed to check whether the L band in ALOS-PALS...

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Bibliographic Details
Published in:Journal of the Indian Society of Remote Sensing 2024-04, Vol.52 (4), p.757-769
Main Authors: Hati, Jyoti Prakash, Mukhopadhyay, Anirban, Chaube, Nilima Rani, Hazra, Sugata, Pramanick, Niloy, Gupta, Kaushik, Bharadwaz, Ganni S. V. S. A., Mitra, Debashis
Format: Article
Language:English
Subjects:
aboveground biomass
Availability
Backscattering
Biomass
blue carbon
C band
Carbon
carbon sinks
data collection
Datasets
Earth and Environmental Science
Earth Sciences
Empirical equations
India
Radar
Radar data
Remote Sensing/Photogrammetry
Research Article
Synthetic aperture radar
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Summary:The present study deals with the estimation of aboveground biomass (AGB) using synthetic aperture radar (SAR) data in a highly complex mangrove assemblage of Lothian Island, Indian Sundarbans. A comparative analysis between the SAR datasets was also performed to check whether the L band in ALOS-PALSAR-2 data has any advantages over the C band in RISAT-1 and Sentinel-1 data. Empirical equations available in the literature were used to calculate plot-level biomass, which was then regressed with backscatter values produced from SAR datasets to obtain an AGB map of Lothian Island. AGB in Lothian Island ranged from 1.15 t/ha to 79.83 t/ha with an average value of 20.23 t/ha. Backscatter generated from RISAT-1 RH, Sentinel VH and ALOS-PALSAR-2 HV and VH performed best when regressed with field observations with R 2 values of 0.91, 0.83, 0.78 and 0.97 respectively. This research could be useful as a valuable input in carbon mapping and could serve as a baseline report of blue carbon stock availability on Lothian Island, Sundarbans.
ISSN:0255-660X
0974-3006
DOI:10.1007/s12524-023-01788-9