The use of hydrographic basin as territorial unit for identifying environmental problems helps defining actions for reclamation and preservation.
There are many environmental problems in Rio Grande do Sul, in their majority resulting from the forms of appropriation and use society makes of natural resources. Some of these problems are easily identifiable for comprising large territorial extensions or directly influencing quality of life conditions of a large number of inhabitants in diverse locations of the State.
The recognition of the occurrence of environmental problems is fundamental for the definition of public policy actions of reclamation and preservation and for stimulating greater participation of society. Thus, the identification of these phenomena using the hydrographic basin as territorial unit helps understanding the environmental dynamics to which local actors are directly related.