Abstract
Although radioactive contamination of agricultural land mayrequire food production to cease, in many situations food contamination can be kept below the intervention limits throughapplication of countermeasures. However, the radiological benefits of these measures may be accompanied by negative impacts on the environment. The aim of this work was to assessthe impacts of selected countermeasures on water quality via losses of soil and phosphorus in river catchments in Scotland and Finland. Four countermeasures, suitable for different levelsof radioactive deposition, were studied: deep ploughing, skim and burial ploughing, changes in the feeding of livestock andcessation of production. The assessments were performed using adeterministic mathematical simulation model capable of estimatingthe impact of changes in management practices and land use on thehydrology and on soil and phosphorus losses from land to water.Skim and burial ploughing had the least impacts. Deep ploughinggenerally reduced phosphorus losses but had variable effects on soil loss, which depended on the erodibility of the subsoil. Changes in the dairy feeding regime from roughage-dominated (local grass production) to more concentrates (local cereal production or imported) had variable impacts, depending on the local agricultural systems and management practices. The worstimpacts on erosion and phosphorus losses may occur where large areas of grassland are converted to cereal production. Cessationof agricultural production resulted in large (50–90%) reductions in soil and phosphorus losses. The most recommended ofthe assessed countermeasures is skim and burial ploughing, but its wider use depends on the availability of specialized technical equipment.
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Rekolainen, S., Salt, C.A., Bärlund, I. et al. Impacts of the Management of Radioactively Contaminated Land on Soil and Phosphorus Losses in Finland and Scotland. Water, Air, & Soil Pollution 139, 115–136 (2002). https://doi.org/10.1023/A:1015818902034
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DOI: https://doi.org/10.1023/A:1015818902034