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Abstract Built up expansion in peri-urban areas can have significant environmental consequences. Monitoring these land changes helps assess the impact on ecosystems. It allows for early detection of negative trends and helps develop strategies to mitigate environmental degradation. The present study investigates the correlation between expansion in peri urban areas and temperature on the surface of the land. The objective of the study is to evaluate the relationship and degree of the link between land surface temperature and urban growth using the spectral indices NDVI and NDBI. Satellite imagery for 1991 and 2001 was used to compute the NDVI, NDBI, and LST maps in ArcGIS. A grid set of 463 points was selected using the fish net sampling technique in the area of interest and correlated. A positive relationship between NDBI and LST, a negative relationship between NDVI and LST, and a negative correlation between NDVI and NDBI are all indicated in the results of the assessment. The results indicate that the increased area of greenspaces shows less land surface temperature. An increase in barren/built-up areas shows increased land surface temperature. These relationships highlight the interplay between urban expansion, vegetation cover, and temperature on the land surface. As lands in the peri-urban areas are consumed for urbanization, areas with high built-up density and limited vegetation will likely exhibit higher land surface temperatures causing urban heat islands. In comparison, regions with more vegetation tend to experience colder temperatures. A deep insight into these correlations can help urban planners and policymakers make informed choices that limit the negative consequences of urbanisation on the environment and human well-being and support sustainable urban growth.
Narayani et al. (Fri,) studied this question.