Identificação de atividades antrópicas na microbacia de um riacho urbano no Município de Santarém, Pará, Brasil.

Abstract

The urbanization process in the Amazonian municipalities put greater pressure on the existing watercourses in the urban area. In the municipality of Santarém-PA, an Amazonian stream, the stream of Urumari, has been suffering the impacts resulting from this process. In this sense, a study was carried out that aimed to elaborate an identification map of anthropic activities along the course of the stream. For this, workshops were held bringing together leaders from the neighborhoods of the Urumari microbasin, environmental agents, which made it possible to identify the impacting points according to their knowledge. After the workshops were held, the environmental agents were trained, through a georeferencing course, which allowed them to collect data through the Global Positioning System of the anthropic activities pointed out in the workshop. As a result, it was possible to identify places that bring some kind of impact to the stream, such as the presence of sawmills, galleries, vegetable gardens, animal breeding, bridges, potteries, construction of irregular houses, among others. The workshop and training enabled the mapping of human activities that occur in stream of  Urumari. From the mapped points, it was observed that there is an unrestrained growth of urbanization around the stream, bringing as a consequence the environmental degradation of this aquatic ecosystem.

Key words: Mapping, Aquatic Ecosystem, Degradation.