Elementos para enquadramento da classe de uso da água do Córrego Curral de Arame, Dourados - MS

Abstract

Brazilian law 9.433, dated from January 8th, 1997, defines a watershed as a unit of territorial planning and forsakes the use of five tools that enable the deployment and implementation of the National Water Resources Policy (PNRH), in which framing is a remarkable and important bond and a reference for other management tools. Watersheds play an important role in the processes of hydrological cycle. They are fragile areas often threaten by natural causes or anthropogenic factors. In this sense, this work aimed to perform a geoenvironmental characterization as the subsidy for the process of framing of the Curral de Arame stream from Dourados – MS. The methodology used was based on geotechnological resources, involving techniques of field control with GPS, treatment, storage and spatial analysis of the extracted data from Geographic Information System – GIS as well as some analysis of physicochemical parameters established by the resolution CONAMA 357/2005 from Brazil. The map about the use and occupation of the soil presented at scale 1:100 000 illustrates that from the total area of the watershed, 14,5% was anthropic and 85% was still filled with natural vegetation (primary or secondary) and waterbodies. It was evidenced that agropastoral activities are predominant in the watershed and they play a fundamental role in the economic aspect in the region. The analysis of the physicochemical parameters pointed that the water’s course deserves framed in use classes most demanding. This study may subsidize especially the effectiveness of the framing on this new hydric resource, as well as the planning of the soil use within the municipal administration.