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 language | English |
|---|---|
| Title of host publication | 33rd Asian Conference on Remote Sensing 2012 |
| Subtitle of host publication | ACRS 2012 |
| Place of Publication | Tokyo |
| Publisher | Asian Association on Remote Sensing |
| Pages | 797-804 |
| Number of pages | 8 |
| Volume | 1 |
| ISBN (Print) | 9781622769742 |
| Publication status | Published - Nov 2012 |
| Externally published | Yes |
| Event | 33rd Asian Conference on Remote Sensing 2012, ACRS - 2012 - Pattaya, Thailand Duration: 26 Nov 2012 → 30 Nov 2012 |
Other
| Other | 33rd Asian Conference on Remote Sensing 2012, ACRS - 2012 |
|---|---|
| Country/Territory | Thailand |
| City | Pattaya |
| Period | 26/11/12 → 30/11/12 |
Keywords
- Land cover
- Land surface temperature
- Thermal remote sensing
- Urban Heat Island (UHI)