Hydrological Assessment and Restoration of Water Resources in an Aluminum Industry
AbstractFresh water ecosystems certainly perform an extremely important environmental role for the maintenance of biodiversity. The extension of the occupied area is large, therefore, bringing along its environmental impact. Because of this scenario, it is worth stressing the need to comprehend the many aspects responsible for the occurrence of water courses through hydrogeological and hydrological surveys. Through the support of hydrological and hydrogeological field monitoring it was possible to note the water dynamics in a region of 3400 hectares occupied by areas composed of bauxite residue, resulting from the process of generating aluminum. They are called Residue Storage Areas, or, RSA. Surrounding those areas, there are drainage nets mostly composed by springs and streams in which are considered as permanent preservation areas according to the Brazilian Forestry Code. Such areas should remain preserved or immediately restored considering the risks of environmental impact. In most of the cases, earthmoving works have the greatest potential and, indeed, a disturbed area under restoration actions was assessed. Basic restoration recommendations were set in the end with special attention in the implantation of drainage controlling devices.