Temporal variation of Urban Heat Island using landsat data

a case study of Ahmedabad, India

Divya N. Bajaj, Arun B. Inamdar*, Vineet Vaibhav

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

3 Citations (Scopus)

Abstract

Rapid urbanization and population increase have led to alterations in the surrounding environment of cities, thereby making it imperative to determine the relationship between climate and urbanization. Ahmedabad is the 7th largest city of India situated in the hot and dry climatic region. This research aims to map the Urban Heat Island of Ahmedabad City using Thermal Infrared Imagery of Landsat TM and ETM+. Land Surface Temperature has been calculated using emissivity values and brightness temperature from satellite images of Ahmedabad acquired at same time of the year. The variations in intensity of Urban Heat Island in decade were studied. The UHI intensity varies from 0.4 °C to 0.8°C approximately. The land cover types were determined by Supervised Classification using Maximum Likelihood Classifier. The effect of various land cover types on UHI Intensity was assessed. The average surface temperature was calculated for each land cover class. The highest temperature is contributed by the built up areas. Built up areas occupy 45% of the total area of Municipality Corporation in 2011 as compared to 38% in 1999, contributing to UHI Intensity. The spatial profiles of surface temperature from different years were compared. The changes in the spatial extent of land cover contributing to variations in spatial profile have been determined. The changes in UHI patterns were analyzed in association with land cover maps to determine the impact of surface properties on UHI intensity. The results show that the temperature is low in areas having high NDVI.

Original languageEnglish
Title of host publication33rd Asian Conference on Remote Sensing 2012
Subtitle of host publicationACRS 2012
Place of PublicationTokyo
PublisherAsian Association on Remote Sensing
Pages797-804
Number of pages8
Volume1
ISBN (Print)9781622769742
Publication statusPublished - Nov 2012
Externally publishedYes
Event33rd Asian Conference on Remote Sensing 2012, ACRS - 2012 - Pattaya, Thailand
Duration: 26 Nov 201230 Nov 2012

Other

Other33rd Asian Conference on Remote Sensing 2012, ACRS - 2012
CountryThailand
CityPattaya
Period26/11/1230/11/12

Keywords

  • Land cover
  • Land surface temperature
  • Thermal remote sensing
  • Urban Heat Island (UHI)

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