O carste e a qualidade das águas superficiais da bacia hidrográfica do rio Sucuri, Bonito/MS

This research aimed to analyze the influence of lithotypes of carbonate composition on the quality of the surface waters of the Sucuri River Basin - BHRS, located in the municipality of Bonito - Mato Grosso do Sul, Brazil. To this end, the methodology consisted of two necessary steps: the first is the updating of the geological map of the basin, through field trips; and the second stage consisted of monitoring the quality of surface water along with five points, selected on the Sucuri River. Thus, results were reached that pointed out the significant influence of carbonated rocks on the chemical composition and water quality, be it in its alkaline pH, high conductivity and the concentration of total dissolved solids - TDS, due to the amount of dissolved salts in the water. With this, its framework pointed out some critical points; however, when related to the primary parameter, the concentrations of dissolved oxygen - OD revealed good water quality. The parameter referring to turbidity is the most notable impact of geology on the waters, as the chemical components dissolved from the limestones in the riverbed decant, causing a translucency that brings great scenic beauty to the source. It is concluded that, through this analysis, it was possible to classify the Sucuri River in class I, limiting its use for specific functions, in addition to pointing out that the karst environment has a strong influence on the physical and chemical parameters of surface waters.