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The impact of land-use land-cover on land surface temperature in Fuzhou

• 1、School of Geographical Science, School of Carbon Neutrality Future Technology, Fujian Normal University, Fuzhou 350007, China.

Abstract：This study investigates the land use and land cover (LULC) changes and their impact on land surface temperature (LST) in Fuzhou, a rapidly urbanizing city in southeastern China, from 1990 to 2022. Fuzhou, the capital of Fujian Province, spans 11,968 square kilometers and includes 13 administrative regions. It has experienced significant environmental challenges due to its location in an estuarine basin and a sharp population increase. Using cloud-free satellite imagery from Landsat 5, Landsat 8, and MODIS, this research analyzes LULC changes and LST variations over four time periods: 1990, 2000, 2010, and 2022. The study employs supervised classification and atmospheric correction techniques to ensure accurate data analysis. Results indicate a notable shift in land use patterns, with agricultural land initially increasing but then decreasing significantly by 2022, likely due to urban expansion. Barren land decreased markedly, reflecting successful land reclamation efforts, while built-up areas consistently expanded, highlighting ongoing urbanization. Vegetation cover showed a slight increase, and water bodies exhibited variable changes, influenced by climatic factors and water management practices. LST analysis reveals significant temperature increases, particularly in urban areas, indicating a strong urban heat island effect. The average LST rose from 28.69 C in 1990 to a peak of 40.57 C in July 2022 in built-up areas. These findings underscore the need for effective environmental management and urban planning strategies to mitigate the impacts of rapid urbanization on the local climate and environment. This study provides crucial insights into the environmental dynamics of Fuzhou and emphasizes the importance of sustainable urban development practices to address the challenges posed by rapid urban growth and climate change.

keywords： Land-use Land-cover (LULC) Land surface temperature (LST) GIS Remote Sensing

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