Avaliação da cobertura arbórea urbana de São Gabriel/RS através do uso do sensoriamento remoto

Abstract

Population growth and the disorderly process of urbanization combined with the lack of public policies and the devaluation of afforestation by most Brazilian cities, resulted in the lack of planning and the poor distribution of vegetation in urban areas. In this sense, through geoprocessing tools and the use of remote sensing techniques, it is possible to analyze and obtain information on environmental issues affected by anthropic phenomena. This information is valuable, as it can help in the environmental management of urban centers, in order to improve the environmental quality of cities as well as the well-being of the population that inhabits it. Thus, this study aimed to determine the Percentage of Tree Coverage (PCA) and the Index of Tree Coverage per habitant (ICHA) for the neighborhoods and for the total urban area of the municipality of São Gabriel/RS. For this purpose, only one scene from the CBERS-04A satellite of 05/07/2022 was used, in addition to data from the 2010 IBGE census. With these data it was possible to carry out the supervised classification and quantification of the tree cover and later calculate the quantitative indicators of tree cover. The results showed that, for the total urban area, the PCA found was 21.07%, where a large part of the tree concentration is located, mainly, on the banks of the Vacacaí River and also presented a calculated ICAH of 135.78m²/habitant.