Evaluating and reducing a model of radiocaesium soil-plant uptake |
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Authors: | Tarsitano D Young S D Crout N M J |
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Affiliation: | School of Biosciences, University of Nottingham, University Park, Nottingham, NG7 2RD, UK |
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Abstract: | An existing model of radiocaesium transfer to grasses was extended to include wheat and barley and parameterised using data from a wide range of soils and contact times. The model structure was revised and evaluated using a subset of the available data which was not used for model parameterisation. The resulting model was then used as a basis for systematic model reduction to test the utility of the model components. This analysis suggested that the use of 4 model variables (relating to radiocaesium adsorption on organic matter and the pH sensitivity of soil solution potassium concentration) and 1 model input (pH) are not required. The results of this analysis were used to develop a reduced model which was further evaluated in terms of comparisons to observations. The reduced model had an improved empirical performance and fewer adjustable parameters and soil characteristic inputs. |
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Keywords: | Radiocesium Model Evaluation Soil Plant Reduction |
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