Urban heat island: remote sensing of rooftops in San Francisco parish
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Abstract
INTRODUCTION. The urban heat island is a phenomenon originated by anthropogenic processes that has alterations in the human habitat. Its study allows understanding its causes and projecting actions to counteract it. OBJECTIVE. The research exposes the correlation between the materiality of building roofs and the urban surface heat island in the parish of San Francisco. METHOD. A documentary and field work is contemplated with a qualitative-quantitative approach at an exploratory, descriptive and correlational level, through a documentary analysis and direct and indirect observation, using instruments such as a geographic information system for data processing, drone photogrammetries and data sheets. RESULTS. The results show the impact of materials such as polycarbonate, zinc and fiber cement, which expose surface temperatures between 28°C and 29°C. In addition, the importance of the color of these materials and their state of maintenance is highlighted. The age or area of the roofs influences to a lesser degree the surface temperature of the roofs. CONCLUSIONS. It is concluded the importance to use materials with low thermal inertia or with high solar reflectance index to mitigate the heat island effect, replacing the existing ones, through interventions in buildings, in addition to promoting ordinances and providing benefits to such actions.
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