Kloroflorokarbonlar (CFC) ile yereltisuyu yasinin belirlenmesi: 1-temel ilkeler

Chlorofluorocarbons, CFC-11 and CFC-12, are promising tools for the precise determination of groundwater age recharged after 1940s. Compared to the alternative techniques such as tritium and krypton-85, CFCs possess advantages such as, simplicity of sampling and low analysis cost. The first use of CGCs as age indicators in classical (dinarid type) karstic systems was carried out in Turkey though they have found an increasing use in non-karstic systems within last 5 years. Origin of CFCs in the atmosphere, their natural injection into the groundwater systems, processes affecting their concentration in aquifers, details of CFC sampling in the field and basic principles of analysis are described in this paper. An example of CFC technique is given for Kapuzbasi karstic spring of the Aladag aquifer.