A dynamic model of caesium transport in lakes and their catchments

McDougall, Sandra; Hilton, J.; Jenkins, Alan

doi:10.1016/0043-1354(91)90080-a

Cited by 17 publications

(6 citation statements)

References 6 publications

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“…(4) The main characteristic of the GF in the model by McDougall et al (1991) is the presence of a first term proportional to the Dirac 6 function, whatever the relation between I, and I, may be. This term corresponds to an immediate, partial release to a water body of the radionuclide deposited over the catchment.…”

Section: Model Developed By Mcdougall Et Al (1991)mentioning

confidence: 99%

Analysis of Models Assessing the Radionuclide Migration from Catchments to Water Bodies

Monte

1996

Health Physics

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In this paper the analysis of models for assessing the migration of radioactive substances from catchments to water bodies was carried out. Comparisons are made between the mathematical form of the experimental dissolved radionuclide transfer functions (Transfer Function = the amount of radionuclide flowing per unit time from upstream drainage basin to a water body following a single-pulse deposition of radioactive substance) evaluated for rivers in Europe contaminated after the Chernobyl accident, with the "Green Functions" (Green Function = the radionuclide flow per unit time from catchment to water body calculated by the model as a result of a single-pulse input deposition) characterizing some of the most common models. Generally transfer functions are the sum of some time-dependent exponential components. The analysis showed that two main components (a short-term and a long-term component) may be detected over a period of only a few years after the accident. The comparison of transfer functions and Green functions showed that a) models based on the traditional concept of kd (the radionuclide partition coefficient soil-water) do not explain the higher value of the experimental long-term effective-decay constant for 137Cs compared with 90Sr; and b) traditional models do not explain the nonlinear dependence of the flux (Bq s-1) of dissolved 90Sr migrating through a catchment as a function of the water flux. A semi-empirical model was developed to give reason for the above effects. This model is based on phenomena of water saturation in different soil layers and on the nonreversible processes responsible for the non-availability to migration of radionuclides.

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Section: Model Developed By Mcdougall Et Al (1991)mentioning

confidence: 99%

Analysis of Models Assessing the Radionuclide Migration from Catchments to Water Bodies

Monte

1996

Health Physics

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“…Several experimental studies were aimed at investigating the behaviour of radionuclides in lakes for the development of predictive models (Joshi, 1991;McDougall et al, 1991;Davison et al, 1993;Shukla, 1993;Wieland et al, 1993;Smith et al, 1997). The mentioned assessment of models for predicting the fate of radionuclides in lakes (Monte et al, 2003) demonstrated that the above studies have produced several consolidated results concerning the structures of the models, the levels of uncertainty of the model output, the range of variability of the model parameters.…”

Section: Resultsmentioning

confidence: 97%

Modelling the long-term behaviour of radiocaesium and radiostrontium in two Italian lakes

Monte

Grimani

Desideri

et al. 2005

Journal of Environmental Radioactivity

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“…A mathematical model of cesium transport in lakes was developed that included five compartments: catchment, lake water (epilimnion and hypolimnion), lake sediments, and fish. 160 The model could form the basis of a management tool for the water industry should a major airborne pollution event occur again.…”

Section: Environmental Occurrence and Transport Of Radionuclidesmentioning

confidence: 99%

Radioactive waste

Thomson¹

1992

Water Environment Research

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A dynamic model of caesium transport in lakes and their catchments

Cited by 17 publications

References 6 publications

Analysis of Models Assessing the Radionuclide Migration from Catchments to Water Bodies

Analysis of Models Assessing the Radionuclide Migration from Catchments to Water Bodies

Modelling the long-term behaviour of radiocaesium and radiostrontium in two Italian lakes

Radioactive waste

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