Urbanization induced LULC transformation, its effects on land surface temperature and spectral index responses in Adama city, Ethiopia
This study analyzed land use/land cover (LULC) changes, land surface temperature (LST), and spectral indices in Adama City, Ethiopia, using Landsat satellite images from 2004, 2014, and 2024. The supervised maximum likelihood classification achieved accuracies above 92% across all years, revealing that built-up areas expanded by 43.3% to cover 54.96% of the city by 2024, while agricultural land declined by 14.67%. This urban expansion led to declining NDVI and NDWI values, rising NDBI values, and a spatial homogenization of higher urban temperatures.
Why it matters — It quantifies the direct relationship between rapid urban expansion and the degradation of local thermal and ecological conditions in a rapidly growing Ethiopian city, providing empirical evidence of how the loss of agricultural and wet areas alters the urban microclimate.
Caveat: The study relies on land surface temperature derived from satellite thermal infrared bands, which represents skin temperature at a specific time of day rather than continuous ambient air temperature.
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