Evaluation of the recharge processes and impacts of irrigation on groundwater using CFCs and radiogenic isotopes in the Silao-Romita basin, Mexico.

Autor:	Axel Horst, Jürgen Mahlknecht, Broder Merkel, Ramon Aravena, Yann Ramos-Arroyo
Předmět:	HYDROGEOLOGY GEOLOGY HYDROLOGY GROUNDWATER
Zdroj:	Hydrogeology Journal; Dec2008, Vol. 16 Issue 8, p1601-1614, 14p
Abstrakt:	Abstract  The recharge processes in the overexploited aquifer of the Silao Romita basin, central Mexico, were investigated by means of gaseous tracers (chlorofluorocarbons, CFCs) and radioactive isotopes (C-14, tritium). CFC concentrations varied between 0.06 and 12 pmol/l (CFC-11), 0.03 and 1.7 pmol/l (CFC-12), and 2 and carbonate dissolution. Radiocarbon data indicate, at least in one case, the existence of groundwaters with residence times of more than 10,000 years. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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