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Use of the Food-Chain Model FOOD III and the Soil Model SCEMR to Assess Irrigation as a Biosphere Pathway

机译:使用食物链模型FOOD III和土壤模型sCEmR评估灌溉作为生物圈途径

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Irrigation of contaminated water onto crop land is a relatively direct pathway for radionuclides to deliver a radiation dose to man. Irrigation was not originally included in the SYVAC assesmsnet model for the Precambrian Shield because no irrigation is currently practiced in the region. This report re-evaluates this decision. An analysis of meteorological data shows that crop yield in northern Ontario would benefit from irrigation. Thus, incentives are present for subsistence-scale, and perhaps commercial-scale, irrigation of surface or well water. A food-chain analysis indicated that irrigation with contaminated water could deliver a dose comparable to direct consumption (drinking) of the same water, for some radionuclides. Long-term contamination of soil through irrigation was predicted to be a substantial hazard, even when soil leaching was incorporated into the food-chain model. This report presents parameter estimates that could be used to incorporate irrigation as a pathway in the SYVAC code and will constitute the basis for further decisions concerning this pathway. (ERA citation 11:030579)

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