Bangladeshi Land Cover Change Detection with Satelite Image Using GIS Techniques

Abstract

High-quality land use and land cover data are important for monitoring and analyzing environmental changes in the background of global warming. Bangladesh is a high-density populated country; as a consequence, high-quality land has been reducing every year. So, it is very important to monitor the locations and distributions of land cover and associated changes over time in Bangladesh. In the research work, we have assessed and examined the 17 most recent composed land cover products with the International Geosphere-Biosphere Programme (IGBP) and 15 most recent composed land cover products with the University of Maryland (UMD). We evaluated the model with the land cover of Bangladesh using 500 m multi-temporal MODIS images (MOD13Q1 v006) from the year 2001 to 2018. We have classified layer-1 and layer-2 of the MCD12Q1v006 area into 17 and 15 specific classes subsequently. Accuracy table and figure have shown that permanent wetland, natural vegetation cropland, Borland, and grasslands increase 01% meanwhile savannas land area reduced 3% in this year. Also, water bodies were increased by 01%, but cropland has fluctuated but remains the same in 2018. These land cover changes prove the significant human interventions such as the expansion of croplands with increased population pressure. Our research work is very much helpful for meteorologists for tracking change and understanding in wetlands in Bangladesh.