Formações antropogênicas em sistemas ambientais urbanos: modificações nos igarapés da cidade de Coari-AM

Abstract

The specific studies focused on water bodies have been undergoing a reinterpretation, particularly regarding Urban Hydrographic Basins, since their processes are embedded in a much more complex context than their own dynamics. In this sense, the research exposes anthropogenic formations in urban environmental systems by presenting changes in streams in the city of Coari, State of Amazonas. The main objective was to analyze the hydrogeomorphological changes in the Igarapés Espírito Santo, Pêra and Bucuará River Basins resulting from the urbanization of the city. To achieve this, we scrutinized the physical-natural characteristics that structure the hydrographic system of the research area, as well as its historical process of occupation, aiming to construct correlational parameters of use and occupation to undestand the transformations and changes in its water system. In this way, we seek to compose an analysis of the context of new understandings of the relationship between society and nature. We found that there is significant indifference regarding the management of the River Basins that are located in the city, despite the availability of legal and budgetary subsidies, for the implementation of territorial planning and ordering, which preserves its watercourses. The qualitative and physical-chemical analyzes showed that there is great compromise in its channels, making it necessary to interrupt interventions that adopt the landfill for the expansion of urban land, rectification of the channels, drainage directed to drain in the streams, as they imply contamination and degradation of the hydrography that makes up the city’s geographic space. Therefore, it is necessary to adopt management actions committed to environmental planning and management arising from an intellectual process, which creates control instruments with a technical-scientific, instrumental and participatory basis.