Geospatial Assessment of Urban Growth Dynamics and Land Surface Temperature in Ajmer Region, India
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Climate change is a worldwide phenomenon, and one of its factors is land use land cover (LULC) change. LULC is frequently remolding the face of Earth, owing to both natural and anthropogenic reasons. This change is also responsible for temperature variations on the land surface. The aim of the present study is to draw a spatiotemporal association between LULC, elevation and land surface temperature (LST), considering the region of Ajmer and its vicinity. For the study, satellite images of 1993, 2008 and 2017 of Landsat 5 and Landsat 8 are used. To obtain the LST, window algorithm was employed. Changes in LULC were analyzed and further verified by field data. Relation between LST and elevation was drawn with the help of digital elevation model. It was established that the built-up land has increased by 2.42% since 1993–2017 indicating population growth. Considering LST, maximum mean temperatures were found for degraded/sandy soil; hills/barren/uncultivated land; and fallow land. The lowest temperatures were observed for vegetation and water bodies. Henceforth, it is essential to draw a relation between LULC and LST to have improved perception of the effects of changing land covers on the urban climate.
KeywordsLand use land cover (LULC) Land surface temperature (LST) Urban heat island (UHI) Urban cool island (UCI)
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