URBAN HEAT ISLAND (UHI) ANALYSIS USING GEO-SPATIAL TECHNOLOGY IN PUNE CITY, MAHARASHTRA

Urban Heat Island (UHI) refers to the phenomena of higher surface temperature occurring in urban areas as compared to the surrounding areas. Spatio-temporal changes in UHI can be quantified through Land Surface Temperature (LST) derived from Remote Sensing digital data. Pune city has observed rapid urbanization over the last decade. Due to rising population pressure the city has expanded considerably in a real extent and has also observed substantial land use/land cover (LULC) changes. The major objectives of this paper is to determine changes in the LST and UHI phenomena for Pune city over the period from 1998, 2008 and 2018 and analyze the spatial distribution and temporal variation of LST in context of changes in LULC. In this study, multi-temporal Landsat data covering Pune City for the summer seasons of 1998, 2008 and 2018 were downloaded from USGS website: https://earthexplorer.usgs.gov/. Results reveal that Pune city has witnessed considerable growth in built up area over the last decade, which had clear impact on variation in LST. There has been an average rise of 2.990 C in overall summer temperature. LST change is inversely related to change in vegetation cover and positively related to extent of built up area. The study concludes that UHI of Pune city has intensified and extended over new areas