The effects of dispersion and mixing on radionuclide dating of groundwater
AuthorBitner, Michael J.
LCSH SubjectsRadioisotopes in hydrology.
Groundwater -- Dating.
Radioisotopes in hydrology -- Mathematical models.
Radioisotopes in hydrology -- Data processing.
Groundwater -- Dating -- Mathematical models.
Groundwater -- Dating -- Data processing.
Committee ChairSimpson, Eugene S.
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PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractIn general, the decay age of a water sample and the average age or transit time of the sample are the same only in the case of zero mixing or piston flow. A unified discussion of the theoretical distributions of ages and transit times in hydrologic systems is presented, focusing on transit time distributions for piston flow, exponential, dispersive and mixing cell models. Distributions of two component systems and the errors caused by not considering a two component mixture in radionuclide dating are also considered. After outlining the mathematical treatment of multiple tracer data, these concepts are employed along with computer models to examine hydrochemical data from the Bunter aquifer in England. This analysis indicates the importance of model selection to the interpretation of radionuclide data.
Degree ProgramHydrology and Water Resources