Spatiotemporal Analysis Of Urban Land Surface Temperature (Ulst) In Davao City
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Abstract
Urban expansion has significantly altered the spatial configuration of green spaces, intensifying the urban heat island (UHI) effect in rapidly growing cities like Davao City. This study investigated the spatiotemporal dynamics of urban land surface temperature (ULST) from 2015 to 2024 across the city’s three congressional districts. Using Landsat 9 satellite imagery and geospatial processing in QGIS, annual land surface temperature (LST) trends were derived and analyzed. Results revealed a consistent increase in both minimum and maximum LST values across all districts, with 2024 recording peak temperatures nearing or exceeding 38°C. The most pronounced warming occurred in District I, particularly in highly urbanized barangays such as 1-A, 7-A, and 11-B. Spatial analysis confirmed that densely built-up, vegetation-deficient zones exhibited the highest thermal intensities, while greener, less developed areas maintained cooler surface temperatures. These findings demonstrate the strong inverse relationship between vegetation cover and surface temperature and underscore the ecological implications of urban land use change. Aligned with the Sustainable Development Goals (SDGs), this study calls for the urgent integration of green infrastructure, climate-adaptive planning, and ecological restoration into the city’s development agenda. This research contributes critical empirical data to support sustainable urban strategies and enhance climate resilience in Davao City.
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