Comparison of NDVI, NDBI as indicators of surface heat island effects for Bangalore and New Delhi: Case Study

Shagun Aggarwal; Mandvi Misra

doi:10.1117/12.2325738

9 October 2018 Comparison of NDVI, NDBI as indicators of surface heat island effects for Bangalore and New Delhi: Case Study

Shagun Aggarwal, Mandvi Misra

Author Affiliations +

Proceedings Volume 10793, Remote Sensing Technologies and Applications in Urban Environments III; 1079314 (2018) https://doi.org/10.1117/12.2325738
Event: SPIE Remote Sensing, 2018, Berlin, Germany

Abstract

Unplanned urbanization has drastically altered the natural topography of the cities and the surrounding areas. Migration from rural areas to Cities has led the transformation of the nearby rural areas into the extended city. The increase in an urban environment as an outcome of socio-economic activities has resulted in the urban sprawl of major cities globally including India. Urban sprawl has raised concerns over unplanned land use but also day-to-day weather conditions of the city. Concentrated development in the major cities of Bangalore, Karnataka and Capital city of New Delhi has given rise to serious implications in form of an increase in local temperatures during the last decade. The study aims at representing the change with an increase in urbanization with the formation of UHI. Sophisticated techniques of remote sensing and GIS are used to perform the analysis. Land Surface Temperature (LST) extracted from the thermal band (band 10) of the Landsat-8 OLI data from the DN values is evaluated for detecting spatial-temporal variations in the formation of heat island of the two cities. The LST calculated for each city is analyzed with the NDBI and NDVI to study the relation of surface temperature and respective indices. It was found that the surface temperature follows a positive co-relation with NDBI and a negative co-relation with NDVI. The indices are used as a basis to delineate pervious and impervious areas in the two cities. Landsat and Sentinel 2a satellite imagery temporal data are used to study the area.

Citation Download Citation

Shagun Aggarwal and Mandvi Misra "Comparison of NDVI, NDBI as indicators of surface heat island effects for Bangalore and New Delhi: Case Study", Proc. SPIE 10793, Remote Sensing Technologies and Applications in Urban Environments III, 1079314 (9 October 2018); https://doi.org/10.1117/12.2325738

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