INVESTIGADORES
ZABALA Maria Emilia
congresos y reuniones científicas
Título:
On the sources of salinity in groundwater under plain areas. Insights from 18O, 2H and hydrochemistry in the Azul River basin, Argentina.
Autor/es:
ZABALA, M. E.; MANZANO, M.; VARNI, M.; WEINZETTEL, P.
Lugar:
Montecarlo
Reunión:
Simposio; International Symposium on Isotopes in Hydrology, Marine Ecosystems and Climate Change Studies; 2011
Institución organizadora:
International Atomic Energy Agency (IAEA)
Resumen:
The Azul River basin, with some 6200 km2, is located in the plains of Buenos Aires Province, Argentina. The Azul River flows along 160 km from the Tandilia Range, in the SW, to the Channel 11, in the NE. Average annual precipitation is 1005 mm (1988-2000); mean reference evapotranspiration is 1090 mm. The geology consists of Miocene to recent sediments, mostly sands and silts with some clay and calcrete layers, overlying crystalline rocks and marine sediments. The water table is shallow and groundwater in the aquifer upper 30 m displays an increasing salinity from SW to NE. Previous hypothesis to explain salinity was infiltration of evapo-concentrated surface water, as the small soil slope in the northern basin (
