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Modeling Radionuclide Transport and Uptake in an Integrated Lysimeter Experiment: I. Model Development

Dep. of Civil and Environmental Engineering, Imperial College, London SW7 2BU, UK.

^* Corresponding author (a.butler{at}ic.ac.uk).

ABSTRACT

A model of a set of integrated lysimeters used to study radionuclide transport and uptake in vegetated soils is described. The experimental facility is conceptualized as a network of linked compartments. Observed water fluxes provide the basis for simulating the movement and distribution of radionuclides throughout the entire experimental system. The model incorporates a simplified representation of upward migration of radionuclides into an unsaturated soil followed by leaching. The transfer of radionuclides from the soil to the crop is represented using a dynamic root uptake submodel. The application of the lysimeter system model to data for the radionuclide ²²Na is presented in an accompanying paper.

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