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On the initial 14^C activity in karst aquifers with short mean residence time (CROSBI ID 125302)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Krajcar Bronić, Ines ; Horvatinčić, Nada ; Srdoč, Dušan ; Obelić, Bogomil On the initial 14^C activity in karst aquifers with short mean residence time // Radiocarbon, 28 (1986), 2A; 436-440. doi: 10.1017/S0033822200007566

Podaci o odgovornosti

Krajcar Bronić, Ines ; Horvatinčić, Nada ; Srdoč, Dušan ; Obelić, Bogomil

engleski

On the initial 14^C activity in karst aquifers with short mean residence time

The 14C activity of total dissolved inorganic carbon (DIC) as well as tritium activity and stable isotope content (13C, 2H, 18O) of spring water were measured for 3 consecutive years at 3 karst springs that feed Plitvice Lakes, NW Yugoslavia. The constant chemical and stable isotope composition and temperature indicated well mixed aquifers. A very short mean residence time of underground water (2–5 yr) was determined by tritium activity measurements. Measured C activities of 3 karst springs varied from 60.0% to 82.5%. The measured C activities were compared with calculated 14C activities based on various models using measured values of C activity of soil at different depths and 13C content of limestone, plants, and soils from the recharge area. Our measurements indicate that recharge systems in karst aquifers are open to the atmosphere. The atmospheric CO2 contributes to the 13C content and the C activity of ground water to an estimated extent which varies between 10 and 40% of DIC.

initial activity; radiocarbon; mean residence time; karst; Plitvice

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Podaci o izdanju

28 (2A)

1986.

436-440

objavljeno

0033-8222

1945-5755

10.1017/S0033822200007566

Povezanost rada

Fizika, Geologija, Kemija

Poveznice