Abstract
Evidence from research in the Pripyat catchment, reviewed here, indicates that under the ecological conditions prevalent in this area, radiocaesium (137Cs) is highly mobile in both river water and poorly drained organic soils. Data collected at three different spatial and temporal scales demonstrate the effects of hydrological events on 137Cs mobility. During the period 1988–1994, 137Cs contamination in some poorly drained organic soils in the Pripyat catchment and in the milk from cows grazing on these soils are generally declining much faster than the radioactive half life. However, sharp increases in levels of 137Cs in both floodplain soils and milk to 2–3 times that observed immediately after the initial deposition have been measured immediately after summer floods. The processes causing these observed changes have not yet been fully explained but the sites where enhanced 137Cs mobility has been detected are clearly associated with the spatial patterns of organic soils and river flooding.
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Burrough, P.A., van der Perk, M., Howard, B.J. et al. Environmental Mobility of Radiocaesium in the Pripyat Catchment, Ukraine/Belarus. Water, Air, & Soil Pollution 110, 35–55 (1999). https://doi.org/10.1023/A:1005028729330
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DOI: https://doi.org/10.1023/A:1005028729330