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- W2048017091 abstract "A numerical model of the Odiel-Tinto estuary (Spain) has been developed to study the self-cleaning process that was evidenced from 226Ra measurements in water and sediments collected in the period 1999-2002, after direct releases from a fertilizer complex ceased (in 1998). The hydrodynamic model is first calibrated, and standard tidal analysis is carried out to calculate tidal constants required by the dispersion code to determine instantaneous water currents and elevations over the estuary. In this way, long-term simulations may be carried out. The dispersion code includes advective/diffusive transport of radionuclides plus exchanges with bottom sediments described through a kinetic approach. The dispersion model is first tested by comparing computed and measured 226Ra concentrations over the estuary resulting after releases in the Odiel and Tinto rivers. Next, it is applied to simulate the self-cleaning process of the estuary. The time evolution of radium concentrations in bed sediments is in generally good agreement with observations. The computed sediment halving time of the estuary is 510 days, which also is in good agreement with that estimated from measurements." @default.
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- W2048017091 date "2005-03-01" @default.
- W2048017091 modified "2023-09-30" @default.
- W2048017091 title "Self-cleaning in an estuarine area formerly affected by 226Ra anthropogenic enhancements: numerical simulations" @default.
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- W2048017091 doi "https://doi.org/10.1016/j.scitotenv.2004.07.029" @default.
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