Análise dos impactos ambientais das atividades potencialmente poluidoras na bacia hidrográfica do arroio Chasqueiro.

Abstract

The water quality of a watershed can be affected by several factors, such as climate, vegetation cover, geology, topography, use and management of the basin. In the Chasqueiro stream basin, municipality of Arroio Grande-RS, agriculture is among the main factors of transformation of environmental quality. The hypotheses of this work are that the areas of permanent preservation in this basin are not being respected and that there are relevant impacts in this area. The objective of this work was to analyze the environmental impacts on physical, biological and anthropic environment caused by potentially polluting activities in the Chasqueiro river basin and to collect data and analyze the situation of riparian forests and springs. It was verified that, in the studied basin, the natural areas around the springs found upstream of the Chasqueiro dam are presently preserved, but with reduced native vegetation, compared to what would be considered ideal for the conservation of Permanent Preservation Areas, Making necessary the restoration of the ciliary forest in several points of the stream. Considering the analysis of the environmental impacts in the river basin, through the interaction matrix, according to the magnitude and importance of the impacts, it is concluded that the environmental impact of potentially polluting activities in the Chasqueiro river basin is high, and it is necessary to adopt mitigating and compensatory measures in order to restore the environmental balance in this watershed.