Quantifying the Effects of Blue Carbon Storage Considering Coastal Landscape Change in Hatiya and Manpura Islands of Bangladesh: A Remote Sensing Approach

Author: Khan Mohammad Ibtehal, Taspiya Hamid, Nigomananda Biswas, Shafiq Reza, Abdullah Al Mahmud, Md Minarul Hoque
DOI: doi.org/10.70279/bmj-v8-1040
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Over the last three decades, the coastal landscapes of Hatiya and Manpura islands in Bangladesh have experienced significant changes, resulting in notable variations in carbon storage both temporally and spatially. This study utilized seven sets of remotesensing images from the Landsat Satellite website, capturing data from both premonsoon and post-monsoon seasons, to analyze coastal landscape changes (CLC). Spatiotemporal variations in land use and land cover (LULC) classifications were assessed, alongside changes in carbon storage using the carbon-stock-assessment modules of the integrated valuation ecosystem services and tradeoffs (InVEST) model. The results were mapped using ArcGIS 10.7. The findings conceded that agricultural land, vegetation, and built-up areas increased over the study period, while water bodies decreased. Vegetation and water bodies accounted for the highest carbon storage and sequestration, followed by agricultural areas, bare soil, low-lying areas, built-up regions, and sandy soils. Hatiya Island demonstrated higher carbon capture than Manpura Island, with the study area collectively storing 6,822.95 Mg/hm² of carbon over the three decades. The results underscore the need for ecological interventions to enhance species’ well-being and maintain ecosystem health. The study highlights critical implications for strategic land-use planning, the adjustment of ecosystem carbon cycles, and informed policy development to address ongoing environmental changes.