Dating of young groundwater using four anthropogenic trace gases $(SF_{6},SF_{5}CF_{3}, CFC-12$ and Halon-1301): methodology and first results
PBN-AR
Instytucja
Wydział Fizyki i Informatyki Stosowanej (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Isotopes in Environmental and Health Studies
ISSN
1025-6016
EISSN
1477-2639
Wydawca
Taylor and Francis Inc.
Rok publikacji
2016
Numer zeszytu
4-5
Strony od-do
393--404
Numer tomu
52
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.8
Autorzy
(liczba autorów: 2)
Słowa kluczowe
EN
tritium
groundwater dating
hydrological modelling
bromotrifluoromethane
gaseous anthropogenic tracers
isotope hydrology
sulphur hexafluoride
SF5CF3
Streszczenia
Język
EN
Treść
A dedicated, GC-based analytical system is presented which allows detection of four anthropogenic trace gases (SF6, SF5CF3, CFC-12 and Halon-1301) in a single water sample, with detection limits and measurement uncertainties sufficiently low to employ them as quantitative indicators of groundwater age. The gases dissolved in water are extracted in the field using the method based on a dynamic head-space concept. In the laboratory, the investigated gases are cryogenically enriched, separated and measured using an electron capture detector. Reproducibility of the analyses is in the order of 2-5%. The investigated tracers were measured in several production wells located in the recharge area of an intensively exploited aquifer in southern Poland. While the piston-flow ages of groundwater in the investigated wells revealed internal consistency, they appeared to be generally smaller than the ages derived from time series of tritium content in those wells, interpreted by lumped-parameter models. This difference stems mainly from significantly longer travel times of tritium through the unsaturated zone, when compared to the gaseous tracers being used. The results of this study highlight the benefits of using multiple tracing in quantifying timescales of groundwater flow in shallow aquifer systems.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:102513
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