Spatio-temporal studying of plains cover in Dezful city based on temperature changes, land use and vegetation using remote sensing

Urbanization and the increase of impermeable materials cause significant changes in the thermal properties of the region, which leads to the creation of urban thermal islands, on the other hand, the change of use caused by human activities leads to adverse effects on the region's environment. Plains areas are a clear example of these phenomena. The purpose of this study is to analyze the spatial and temporal changes of land use/land cover and its effects on the surface temperature of the plains of Dezful city. Landsat images in 2000-2020 were used to analyze the changes of (LU/LC) and its thermal bands to investigate LST using remote sensing techniques. Significant changes in land use were observed in this fertile plain during the study period. The highest percentage of land use change was related to the change of barren to agriculture and gardening, the second percentage land use change of water use to agriculture and gardening. During the monitoring period of 151,189, water areas decreased to half of 66,712 hectares. urban areas increased almost twice from 97,462 to 174,713. The Land surface temperature has increased during the monitoring period, the average temperature has increased in all classes of land use, but temperature increase in urban and barren classes are more than agricultural and gardening classes. The vegetation cover index increased during the monitored period, but this increase was not enough to prevent the temperature increase.