Upward movement of tritium from contaminated groundwaters: a numerical analysis.
J Environ Radioact
; 84(2): 259-70, 2005.
Article
en En
| MEDLINE
| ID: mdl-15990205
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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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Contaminantes Radiactivos del Suelo
/
Tritio
/
Contaminantes Radiactivos del Agua
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
J Environ Radioact
Asunto de la revista:
SAUDE AMBIENTAL
Año:
2005
Tipo del documento:
Article
País de afiliación:
Francia
Pais de publicación:
Reino Unido