Afyon-Akarçay havzasında kloroflorokarbon (CFC) esaslı yer altı suyu geçiş zamanının belirlenmesi

Thesis Type: Postgraduate

Institution Of The Thesis: Hacettepe University, Fen Bilimleri Enstitüsü, Jeoloji Mühendisliği A.B.D., Turkey

Approval Date: 2003

Thesis Language: Turkish


Supervisor: Türker Kurttaş


Determination Of The Chlorofluorocarbon Based Groundwater Residence Times Of The Afyon-Akarcay Basin Derya AKTAŞ ABSTRACT Chlorofluorocarbons of atmospheric origin are used as important tool to determine the apparent age of young ground waters in the hydrogeological studies. Apparent age of ground waters will change depending on their recharge temperatures and recharge elevations. Partial pressure values of groundwater samples were compared with atmospheric CFC content to determine the participation time to groundwater system. Apparent age of groundwater is calculated by the difference between sampling and recharge years. In this research, apparent age of the representative groundwater samples from Afyon- Akarçay Basin were determined and effective parameters in age calculations and relations among them were examined. Chemical physical and isotopic contents and their relations in the groundwater samples were also evaluated. Relation between 180 content and average air temperature in the basin were used to calculate the recharge temperature of groundwater samples, and this relation were compared by the equations suggested by Dansgaard (1964) and Bayan (1998). To calculate the recharge elevations, relations between long term 180 contents of rain samples and their sampling elevations were used. Apparent ages of ground water samples change between 12 to 27 years in general. Ages are comparatively small in the south, southeast and and western part of the basin while it is greater in the north, northwest and center of the basin. Key words: Akarçay Basin, Chlorofluorocarbons, apparent age, environmental isotopes, groundwater turnover time, Supervisor: Assist. Prof. Dr. Türker Kurttaş, Hacettepe University, Geological Engineering Depth, Hydrogeological Engineering Section, 06532, Beytepe, Ankara 11