School of Biosciences, University of Nottingham, University Park, Nottingham NG72RD, UK.
J Environ Radioact. 2011 Mar;102(3):262-9. doi: 10.1016/j.jenvrad.2010.11.017. Epub 2011 Jan 12.
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.
一个现有的放射性铯向草本植物转移的模型被扩展到包括小麦和大麦，并利用来自广泛土壤和接触时间的数据进行了参数化。该模型结构使用未用于模型参数化的可用数据的子集进行了修订和评估。然后，使用所得模型作为系统模型简化的基础，以测试模型组件的实用性。该分析表明，不需要使用 4 个模型变量（与有机物上放射性铯的吸附以及土壤溶液钾浓度对 pH 的敏感性有关）和 1 个模型输入（pH）。该分析的结果用于开发一个简化的模型，该模型进一步根据与观测结果的比较进行了评估。简化模型具有改进的经验性能和更少的可调参数和土壤特征输入。
