Análise da implementação dos telhados verdes como estratégia para cidades sustentáveis: um estudo da cidade do Recife, Pernambuco

Abstract

The intensification of urbanization and the withdrawal of green in cities without proper planning can cause several negative impacts and cause a collapse in urban centers. In view of the intense relations between the actors in the city, some impacts can be felt more intensely, as will be raised in this topic: irregular land occupation, urban waterproofing and flooding and deforestation. Therefore, the objective of this work is to analyze the implementation of green roofs as a strategy for sustainable construction in the city of Recife. The projects with green roofs were surveyed in the public archives of the three regional divisions of the Recife City Hall through documentary surveys, the georeferenced identification of the green roofs, the urbanized areas of Recife and the flooding points in the city were made possible by the use of free software with open source, multiplatform geographic information system that allows viewing, editing and analysis of georeferenced data, Quantum QGIS 3.12.0, with the creation of thematic maps. The survey enabled the identification of 143 projects containing green roofs, adding approximately 88,393 m² of green roofing area in the city, corresponding to about 5% of the area under construction for 2015 (≅ 1,766,510 m²). The results induced that the total area of green roof lifted, will have the potential to remove about ≅ 176,787 kg of particulate material per year, avoid the emission of ≅ 41,293 kg of CO2 per year, remove about ≅ 751 kg of pollutants per year and decrease about ≅ 1,237,507 L of water that would be directed to the surface of the city. It is concluded, therefore, that the appropriation of the green roof in the city as an item of the category of green coverage, together with other techniques such as afforestation, green facades, permeable soils, gardeners, among others, is essential for the insertion of buildings that offer ecosystem services and prevent collapse, making cities more resilient and with a better quality of life.