MONITORING LAND USE AND LAND COVER CHANGES OF DHAKA CITY: A REMOTE SENSING AND GIS-BASED ANALYSIS

Green vegetation and blue space (water body) dynamics keep the proper ecosystem of an area. Dhaka is one of the most densely populated cities in the world and continuously reducing its green and blue space. The present study has tried to determine the impact of urbanization in Dhaka city by analyzing the temperature, precipitation, solar radiation, and humidity data for the last 30 years; where the green and blue space dynamics are impacted together. The primary and secondary types of data were used for this study. For the green area, satellite image (mainly Landsat 8 and 5) has been used as raster data to analyze the remote sensing image classification and for the blue space, raster data has been used to find out those areas which are impacted throughout the year. With the help of those data, the study can illustrate the reason behind the degradation and transformation of green and blue space with time. From 1988 to 2020 about 7500 hectares of land have been increased by urbanization and at the same time, 6600 hectares of vegetation land were lost. Also, the research has focused on the actual amount of impacted zone and has tried to predict the condition of land use of Dhaka city in 2050. The present study predicted that a significant amount of vegetation will be lost by 2050 and imposed a significant impact on Dhaka city's climate, which is deteriorating mostly by rapid urbanization with a reduction in green and blue space. The study has the potential to use as a reference work and can be used for other areas in the future