Email the author 
Open Access
Subscription Access
Characterization of Groundwater in the Cariri (Ceara, Brazil) by Environmental Isotopes and Electric Conductivity
Abstract
The Cariri region is the largest sedimentary basin in the state of Ceara, Brazil. Located in the southern portion
of the state, it comprises the Araripe Plateau and the Cariri Valley on its northern foot. The region's groundwaters are being heavily exploited. Using electric conductivity (EC) and 18O, 14C and 3H data, we differentiate groundwaters from various origins.
We identified three horizons of springs on the slope of the Plateau through their geologic environment and the EC of
their waters. Groundwaters from wells in the Cariri Valley are classified according to the aquifers exploited as indicated by
the drilling profiles. However, strong tectonic features and intense fracturing in the Valley produce a great many horizontal discontinuities, which result in mixing of groundwaters from different aquifers.
of the state, it comprises the Araripe Plateau and the Cariri Valley on its northern foot. The region's groundwaters are being heavily exploited. Using electric conductivity (EC) and 18O, 14C and 3H data, we differentiate groundwaters from various origins.
We identified three horizons of springs on the slope of the Plateau through their geologic environment and the EC of
their waters. Groundwaters from wells in the Cariri Valley are classified according to the aquifers exploited as indicated by
the drilling profiles. However, strong tectonic features and intense fracturing in the Valley produce a great many horizontal discontinuities, which result in mixing of groundwaters from different aquifers.