HYDROGEOLOGIC CHARACTERIZATION OF THE CRYSTALLINE AND TUBARÃO AQUIFER

Abstract

The Jundiai River Catchment is located mainly on the Crystalline Aquifer System, where groundwater flow depends on rock discontinuities, and other part of this catchment is on the Tubarão Aquifer System, which behavior is also heterogeneous and anisotropic. The productivity of these aquifers is not so different: the wells that exploit the Tubarão Aquifer System have median specific capacity equal to 0,09 m3/h/m, and the ones that exploit the Crystalline AquiferSystem, as well as the mixed wells (which exploit both aquifer systems), have specific capacity equal to 0,07 m3/h/m. The distribution of values is greatly variable, since the productivity depends on the location of wells in relation to the geological structures witch characteristics (opening and conectivity) favour groundwater flow. They are brittle structures with NW-SE and E-W directions that occur mainly along the regional shear and fault zones. The main groundwater flow in the basin is from southeast to northwest and the main recharge area is in highlands. From highlands, groundwater is led to the Paraná Sedimentary Basin, passing by the geological structures cited above.

Keywords

• sistema aqüífero cristalino, sistema aqüífero Tubarão, rio Jundiaí, água subterrânea.