Volume 9, Issue 3 (12-2022)
Journal of Spatial Analysis Environmental Hazards 2022, 9(3): 75-90 |
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jasem mohammad T, rahmani M, abdi K. Changes in ground surface temperature in the city of Halle and its relationship with changes in the NDVI index. Journal of Spatial Analysis Environmental Hazards 2022; 9 (3) :75-90
URL: http://jsaeh.khu.ac.ir/article-1-3327-en.html
URL: http://jsaeh.khu.ac.ir/article-1-3327-en.html
1- Mazandaran University
2- Mazandaran University ,m.rahmani@umz.ac.ir
2- Mazandaran University ,
Abstract: (5206 Views)
Changes in ground surface temperature in the city of Halle and its relationship with changes in the NDVI index
abstract
The temperature of the urban environment is one of the parameters that citizens are in contact with at any moment. Studies show that the global temperature is constantly increasing due to environmental changes. One of these parameters that affect the increase in temperature; The physical growth of the city and its consequent destruction and loss of vegetation. In this study, using Landsat satellite images for the years 2001, 2011 and 2021; and the implementation of the single-channel algorithm, the surface temperature of the ground in the Iraqi city of Halla was calculated and its changes were investigated and analyzed. On the other hand, the NDVI index was calculated as a vegetation index on the mentioned dates and its changes were analyzed with the temperature changes of the earth's surface. The general results of this research showed that the area of the city of Halle has doubled during the study period, and this has caused a decrease in the amount of vegetation and an increase in the temperature of the earth's surface. In the end, the correlation between the surface temperature and the NDVI index was calculated, which was equal to 46.92, 44.35 and 52.98% for the years 2001, 2011 and 2021, respectively. This issue shows the strong relationship between these two parameters and the effect of the reduction of vegetation on the increase in the temperature of the earth's surface.
Key words: Earth surface temperature, vegetation, NDVI, city growth, Halle city
abstract
The temperature of the urban environment is one of the parameters that citizens are in contact with at any moment. Studies show that the global temperature is constantly increasing due to environmental changes. One of these parameters that affect the increase in temperature; The physical growth of the city and its consequent destruction and loss of vegetation. In this study, using Landsat satellite images for the years 2001, 2011 and 2021; and the implementation of the single-channel algorithm, the surface temperature of the ground in the Iraqi city of Halla was calculated and its changes were investigated and analyzed. On the other hand, the NDVI index was calculated as a vegetation index on the mentioned dates and its changes were analyzed with the temperature changes of the earth's surface. The general results of this research showed that the area of the city of Halle has doubled during the study period, and this has caused a decrease in the amount of vegetation and an increase in the temperature of the earth's surface. In the end, the correlation between the surface temperature and the NDVI index was calculated, which was equal to 46.92, 44.35 and 52.98% for the years 2001, 2011 and 2021, respectively. This issue shows the strong relationship between these two parameters and the effect of the reduction of vegetation on the increase in the temperature of the earth's surface.
Key words: Earth surface temperature, vegetation, NDVI, city growth, Halle city
Type of Study: Research |
Subject:
Special
Received: 2022/08/9 | Accepted: 2022/12/2 | Published: 2022/12/31
Received: 2022/08/9 | Accepted: 2022/12/2 | Published: 2022/12/31
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