IMAPCT OF LAND USE AND LAND COVER ON LAND SURFACE TEMPERATURE ON AHMEDABAD REGION

Abstract

Increase in human settlement for private and residential purpose have a huge impact on land usage. Modification of vegetation and green lands into commercial areas is leading to environmental chaos and rising land surface temperature (LST). Fast built up growth can be seen in Ahmedabad region in past decades. Major amount of population of Gujarat is in Ahmedabad. It is one of the highly populated and rapidly growing city in north India. It is business capital of Gujarat. The aim of this study is to examine the effect of land use/land cover (LULC) on LST in past 18 years. This work is done by the methods of remote sensing. Total three images are use used from Landsat satellites, two from Landsat 5 and 1 from Landsat 8 for the year 2000, 2008 and 2018 respectively. Image analysis and all the processing is done in ArcGIS software. Supervised classification technique was used to calculate land classes. Five land classes: Water, Forest, Vegetation, Barren land and Urban area were defined on the basis of supervised classification technique. Land Surface Temperature maps for the year 2000, 2008 and 2018 is retrieved by mono-window algorithm. Landsat data also helped to prepare NDVI for same time period. Mean surface temperature for different land class is computed by selecting 30 random points on study area. The highest temperature can be seen in barren land and urban area i.e. 460C and 430C respectively. Low temperature can be observed in vegetation and water area in the year 2018. In this project, a strong relation between vegetation, urban and surface temperature can be seen in Ahmedabad region