Changes in Land Use Land Cover and its Resultant Impacts on Urban Thermal Environment of Chattogram City: A spatio-temporal analysis based on remote sensing and GIS techniques

Abstract

The present study assessed the changes in land use and land cover to correlate the variations in the land surface temperature of Chattogram city. In order to analyze land use land cover (LULC) change and determine its effects on land surface temperature in the city area, temporal Landsat (5,7 ETM+ and 8,9 OLI) imageries from four time periods (2007, 2012, 2017 and 2022) were used. To assess the correctness of the picked random pixels, current ground truth data gathered from several sources was applied. Raster data has been utilized to identify the places that are influenced year-round in the green space (i.e vegetation cover) and to examine the remote sensing image categorization for the green area using satellite images. These enable the study to explain the causes of the degradation and alteration of green space throughout time. The study identified that urbanization has resulted in a significant rise (about 2840 hectares, 16.74%) in urban land between 2007 and 2022, causing a loss of vegetative land (about 656 hectares, 3.85%). Additionally, the research concentrated on the actual affected area and attempted to forecast the cities' land use in 2037, which revealed a large loss of vegetation by that year. The research has the potential to be utilized as a reference in the future.