Upward movement of tritium from contaminated groundwaters: a numerical analysis [An article from: Journal of Environmental Radioactivity] |  | Authors: Y. Belot, B.m. Watkins, O. Edlund, D. Galeriu, Gui
Publisher: Elsevier
Category: Book
Buy New: $10.95
Format: Html
Media: Digital
Publication Date: January 2005
Availability: Available for download now
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Product Description
This digital document is a journal article from Journal of Environmental Radioactivity, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
This paper describes a research-oriented modelling exercise that addresses the problem of assessing the movement of tritium from a contaminated perched aquifer to the land surface. Participants were provided with information on water table depth, soil characteristics, hourly meteorological and evapotranspiration data. They were asked to predict the upward migration of tritium through the unsaturated soil into the atmosphere. Eight different numerical models were used to calculate the movement of tritium. The modelling results agree within a factor of two, if very small time and space increments are used. The agreement is not so good when the near-surface soil becomes dry. The modelling of the alternate upward and downward transport of tritium close to the ground surface generally requires rather complex models and detailed input because tritium concentration varies sharply over short distances and is very sensitive to many interactive factors including rainfall amount, evapotranspiration rate, rooting depth and water table position.
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