Browsing by Author "Rojas Restrepo, Juan David"
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Item Análisis Multitemporal del Cambio en la Formación de Islas de Calor Urbano para el Municipio de Jamundí en el Valle Del Cauca Periodo (2015 – 2023)(Universidad Santiago de Cali, 2024-08-10) Rojas Restrepo, Juan David; Escalante Caicedo, Ana BelyThe Municipality of Jamundí has experienced rapid urban growth in recent years, which has led to an increase in the formation of Urban Heat Islands (UHI) in areas with higher temperatures. However, the lack of understanding of the distribution of UHIs and their relationship with various factors hinders urban planning and affects the quality of life of the inhabitants. This study aims to analyze the spatial distribution of UHIs through a multi-temporal analysis, with an emphasis on their influence on the new urban lands defined by the local government. Using Geographic Information Systems (GIS), detailed maps of Land Surface Temperature (LST) were created, highlighting areas susceptible to the formation of Heat Islands. The study evaluated how changes in land use, coverage changes, and urban densification influence local temperatures. The analysis begins with the collection of data, including Landsat and Sentinel satellite images, ensuring the quality and relevance of the data for subsequent analyses. The creation of thematic maps uses free GIS software (QGIS) to visualize and analyze urban temperature variations, determining brightness temperatures, surface temperatures, and NDVI. The multi-temporal analysis of the municipality of Jamundí between 2015 and 2023 reveals a significant increase in the formation of Urban Heat Islands (UHI). In 2015, 90.98% of the study area was classified as "Weak." By 2023, this category decreased to 78.64%, while the "Moderately Weak" and "Moderately Strong" categories increased, reflecting the expansion of UHIs due to urban growth and vegetation reduction, as evidenced in the NDVI maps. The peripheral areas, initially with a high percentage of vegetation and lower temperatures, showed an increase in UHIs as urbanization progressed, especially in the northern and southeastern peripheral zones in 2023. Although the "Weak" areas remained relatively stable between 2019 and 2023, the "Moderate" and "Moderately Strong" categories experienced a significant increase, suggesting a growing trend towards higher temperatures in urbanized areas, with important implications for future urban planning and environmental management.