Analysis of the LST and Vegetation Indices relationship using Landsat-8 data in Duhok Governorate, Iraq
Keywords:LST, NDVI, GRVI, Duhok, Iraq.
Vegetation cover is considered one of the most important factors that affect weather, climate, and the environment. This paper aims to study the correlation between land surface temperature and the Vegetation Indices using Landsat data in Duhok Governorate, Iraq. Landsat-8 images were taken for December, April, July, and October in 2019. Geographic Information System ArcGIS 10.2 package has been used to calculate the results. The Normalized difference vegetation index NDVI, Green ratio vegetation index (GRVI), and land surface temperature (LST) have been computed. The results showed that were a strong positive relationship between vegetation indices during winter, spring, summer, and fall seasons. The correlation coefficient values ranged from (0.9) in winter, (0.96) in spring, (0.95) in summer and (0.89) in autumn seasons. Also, the results showed a strong inverse correlation among LST and NDVI, GRVI indices during winter, spring, summer, and autumn seasons. The strongest correlation between land surface temperature and the Vegetation Indices was in the Spring Season. These correlations can be used to study vegetation health, drought.
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