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ISSN : 1738-1894(Print)
ISSN : 2288-5471(Online)
ISSN : 2288-5471(Online)
토양침적에 의한 137Cs 농작물 오염평가 모델
Model for predicting the 137Cs contamination of an agricultural plant following a soil deposition)
Abstract
A dynamic compartment model is presented to predict the contamination level of agricultural plant by as a result of a soil deposition. The model considered the processes of a percolation, soil mixing by a plowing before transplanting, plant uptake, leaching to a deep soil, and fixation to a clay mineral. The effects of the soil properties (pH, clay mineral, organic matter content, and exchangeable K), which are spatially varied, on a plant uptake and the leaching rates of in a root zone soil were modeled by the Absalom model. To test the validity of the model, the aggregated transfer factors(TFa) for rice plants were compared with those observed from some simulated soil deposition experiments, which were carried out with respect to rice plants cultivated in seventeen paddy soils of different properties for two consecutive years. Observed TFa values of the rice plants did not show an evident trend for the pH and clay content of the soil properties, while they increased with an increasing organic matter content or a decreasing exchangeable K concentration. Predicted TFa values of the rice plants were found to be comparable with those observed.
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JNFCWT
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Korean Radioactive
Waste Society (KRS)
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