Composición isotópica de la precipitación de la Estación Santa Fe. Red Nacional de Colectores. Argentina

DAPEÑA, CRISTINA; PANARELLO, HECTOR

Paraná, Entre Ríos

Congreso; V Congreso Argentino de Hidrogeología; 2007

Grupo Argentino Asociación Internacional de Hidrogeología y Facultad de Ciencias Agropecuarias de la Universidad Nacional de Entre Ríos

The isotope composition of precipitation is a characteristic of each region. It is generally determined by meteorological local parameters like temperature, relative humidity and amount. Precipitation represents one of the most important factors of recharge. Therefore, the knowledge and characterization of the isotope content is of great relevance when a hydrological research is initiated. As a result, systematic measurement of isotope content of precipitation in long term records became a useful tool. The measurement and record of the isotope content of the precipitation of Argentina are made by the stations of the National Network of Collectors. This work presents the first results obtained at the Santa Fe Station during 10/1998 - 12/2003 and the preliminary analyses of the isotope composition of precipitation and its relation to meteorological parameters. This station is located and operated by the “Centro de Informaciones Meteorológicas” of the “Facultad de Ingeniería y Ciencias Hídricas” of the “Universidad Nacional de Litoral”. This station was installed by the “Instituto de Geocronología y Geología Isótopica” (CONICET-UBA) and the Geohydrologic Research Group of the same University. The local meteoric water line matches d2H =8d18O+12/13‰; these data can be used like input function to local hydrologic systems. The 3H concentration varies between 3,3 TU and 21,5 TU. Some high values respond to the spring peak and the highest values probably due to non-natural causes.