Modelling of Chernobyl radiocaesium behaviour in catchment—lake—sediment system Devoke Water (Cumbria, UK)
作者： I.Ya. Bilyi , R.N.J. Comans , J. Hilton , O.V. Voitsekhovitch
DOI: 10.1016/S0166-1116(09)70125-6
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摘要: Abstract A local equilibrium model of radionuclide migration was used to reconstruct a time series Chernobyl radiocaesium concentration in small upland lake, Devoke Water (UK), and assess the wash-off rate. Radiocaesium, ammonium potassium profiles bottom sediment cores sampled 1992 were as input data. Whereas water column has been considered well-mixed system, profile properties are modelled strongly dependent on competing univalent ions (mainly ammonium). Model fits resulted values 0.02 year −1 for rate, 0.01 rapid flush 0.5-1.0 cm boundary layer thickness. The slope down peak (which does not depend fitted parameters) shown good consistency with experimental one.
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