Investigating Thermal Stability in Hyderabad City, India

Abstract Thermal environment and land use status are the two controlling factors for determining the ecological health of any urban area. The study aims to investigates the stability of the relationship between land surface temperature with normalized difference built-up index in Hyderabad City, India using eight Landsat 8 data of the summer season in 2023. The study applies Pearson’s method for determining the correlation coefficient of this relationship. The results represent a consistent nature of land surface temperature and normalized difference built-up index values in this summer season as the range of the mean (0.08 for normalized difference built-up index and 6.78 o C for land surface temperature) and standard deviation (0.02 for normalized difference built-up index and 0.79 for land surface temperature) values of land surface temperature and normalized difference built-up index are significantly low. Land surface temperature and normalized difference built-up index values are very stable (correlation coefficient = > 0.63 for eight land surface temperature images and correlation coefficient = > 0.50 for eight normalized difference built-up index images). Moreover, normalized difference built-up index also built a stable strong positive relationship (average correlation coefficient =0.64) with land surface temperature. The summer season affects the vegetation life of the city and influences the relationship between land surface temperature and normalized difference built-up index. Built-up surface leads to an increase in the value of land surface temperature and also regulates the values of normalized difference built-up index. The study is useful for stable urban environmental planning.