Qualitative assessment in river and phreatic aquifer water in a rural watershed in the Atlantic Forest biome

Watersheds have different water compartments (surface, subsurface, and underground) connected by the soil-water interface. In order to be able relate these compartments, monitoring data are necessary, such as case of Ribeirão Concórdia watershed, in Lontras, Santa Catarina (SC). This study aimed evaluate behavior correlation between rainfall-runoff phreatic surface levels with chemical species concentrations groundwaters a rural watershed. Data 3 piezometers installed hydrographic basin were used: PZ2127, PZ3, PZMC. The equipped hydrostatic level sensors. A fluviometric station is located adjacent PZ2127 (near catchment outlet). Concentrations anions carbon forms analyzed samples (river piezometers) taken every 2-3 weeks, from January 14, 2012, December 23, 2016, totaling 103 samples. Correlations daily verified using Pearson’s coefficient (ρ). river presented dilution effect, while piezometer had highest average species. Precipitation concentration showed no seasonal pattern, events/peaks throughout year. Higher found summer, lower observed winter. Positive correlations obtained.