Analysis of land surface temperature using Geospatial technologies in Gida Kiremu, Limu, and Amuru District, Western Ethiopia

Degradation of vegetation cover and expansion of barren land are remained the leading environmental problem at global level. Land surface temperature (LST), Normalized Difference Vegetation Index (NDVI), Normalized Difference Barren Index (NDBaI), and Modified Normalized Difference Water Index (MNDWI) were used to quantify the changing relationships using correlation analysis. This study attempted to analyze the relationship between LST and NDVI, NDBaI, and MNDWI using Geospatial technologies in Gida Kiremu, Limu, and Amuru districts in Western Ethiopia. All indices were estimated by using thermal bands and multispectral bands from Landsat TM 1990, Landsat ETM+ 2003, and Landsat OLI/TIRS 2020. The correlation of LST with NDVI, NDBaI and MNDWI were analyzed by using scatter plot. Accordingly, the NDBaI was positive correlation with LST (R2 = 0.96). However, NDVI and MNDWI were substantially negative relationship with LST (R2 = 0.99, 0.95), respectively. The result shows that, LST was increased by 5 °C due to decline of vegetation cover and increasing of bare land over the study periods. Finally, our result recommended that, decision-makers and environmental analysts should give attention on the importance of vegetation cover, water bodies and wetland in climate change mitigation, particularly, LST in the study area

Analyzing the correlation of forest and wetland with land surface temperature by using geospatial technology: a case of Yayo district, Southwestern Ethiopia

Forests and wetlands played a crucial role in minimizing the increasing trends of land surface temperature (LST). This study aimed to analyze the contribution of forests and wetlands on LST in Yayo district using multi-spectral and multi-temporal satellite. Landsat images of 1986, 2003 and 2021 were downloaded from United State Geological Survey website with 30 m spatial resolution. Results show that the mean LST was increased from 22.8 °C in 1986 to 27 °C in 2003 over cultivated land. As the results of forest conservation and wetland protection, the LST in Yayo district is experencing a declining trend in the recent year. Result reveal that the normalized difference vegetation index and Normalized Difference Water Index show a strong negative relationship with LST. Over the last two decades, the LST was declined by 1.5 °C due to the protection of forest and wetland ecosystem. Thus, governmental and non-governmental organization should encourage the conservation and protection of forest and wetland ecosystems