Paper Information

Journal:   JOURNAL OF RS AND GIS FOR NATURAL RESOURCES (JOURNAL OF APPLIED RS AND GIS TECHNIQUES IN NATURAL RESOURCE SCIENCE)   winter 2019 , Volume 9 , Number 4 (33) #a00503; Page(s) 102 To 118.
 
Paper: 

Assessing the impact of urban expansion and land cover changes on land surface temperature in Shahrekord city

 
 
Author(s):  Kiani salmi e., EBRAHIMI A.*
 
* College of Range and Watershed Management, Department of Natural Resources and Geosciences, Shahrekord University
 
Abstract: 
Urban expansion and land use changes have a significant impact on land surface temperature (LST). According to the fact that the development of urban is currently one of the most important phenomena in global warming, it is possible to study and measure the temperature of the Earth's surface in urban areas in the shortest possible time with the rapid development of satellite technology. The purpose of this study was to investigate urban expansion and urban heat island (UHI) using remotely sensed data in Shahrekord city. In this study, Ratio vegetation index (RVI) and Normalized difference vegetation index (NDVI), and LST were calculated using multi-spectral and thermal bands of Landsat 7 and 8 satellite images. Land use map was extracted using the maximum-likelihood algorithm in TerrSet software. The overall kappa index was estimated at 0. 82 and 0. 93 for 2003 and 2016, respectively. By comparing two vegetation indexes (RVI and NDVI) and surface temperature during the 13 years (2003 to 2016), it was determined that with urban development, the surface temperature has increased to 2. 210C (from 40. 69 to 42. 90 0C). The results showed that the correlation of NDVI index with the surface temperature map was negative but with positive RVI index. Moreover, these two vegetation indexes, RVI and NDVI, show a more significant relationship with LST in green areas than urban and bare lands. Due to, a significant effect of green areas on regulating LST we recommend that green areas should be expanded in accordance with the urban area expansion.
 
Keyword(s): Thermal remote sensing,Land heat islands (LHI),Land surface temperature (LST),Vegetation index,Shahrekord
 
References: 
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