Abstract
A numerical model of the Odiel-Tinto estuary (Spain) has been developed to study the self-cleaning process that was evidenced from {sup 226}Ra 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 {sup 226}Ra 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.
Perianez, R;
[1]
Absi, A;
Moreno, H P;
Manjon, G;
[2]
Villa, M
[3]
- Departamento Fisica Aplicada I, EUITA, Universidad de Sevilla, Ctra Utrera km 1, 41013-Sevilla (Spain)
- Departamento Fisica Aplicada II, ETSA, Universidad de Sevilla, Av Reina Mercedes 2, 41012-Sevilla (Spain)
- Departamento Fisica Atomica y Nuclear, Universidad de Sevilla, 41080-Sevilla (Spain)
Citation Formats
Perianez, R, Absi, A, Moreno, H P, Manjon, G, and Villa, M.
Self-cleaning in an estuarine area formerly affected by {sup 226}Ra anthropogenic enhancements. Numerical simulations.
Netherlands: N. p.,
2005.
Web.
doi:10.1016/j.scitotenv.2004.07.029.
Perianez, R, Absi, A, Moreno, H P, Manjon, G, & Villa, M.
Self-cleaning in an estuarine area formerly affected by {sup 226}Ra anthropogenic enhancements. Numerical simulations.
Netherlands.
https://doi.org/10.1016/j.scitotenv.2004.07.029
Perianez, R, Absi, A, Moreno, H P, Manjon, G, and Villa, M.
2005.
"Self-cleaning in an estuarine area formerly affected by {sup 226}Ra anthropogenic enhancements. Numerical simulations."
Netherlands.
https://doi.org/10.1016/j.scitotenv.2004.07.029.
@misc{etde_20620527,
title = {Self-cleaning in an estuarine area formerly affected by {sup 226}Ra anthropogenic enhancements. Numerical simulations}
author = {Perianez, R, Absi, A, Moreno, H P, Manjon, G, and Villa, M}
abstractNote = {A numerical model of the Odiel-Tinto estuary (Spain) has been developed to study the self-cleaning process that was evidenced from {sup 226}Ra 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 {sup 226}Ra 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.}
doi = {10.1016/j.scitotenv.2004.07.029}
journal = []
issue = {1-3}
volume = {339}
journal type = {AC}
place = {Netherlands}
year = {2005}
month = {Mar}
}
title = {Self-cleaning in an estuarine area formerly affected by {sup 226}Ra anthropogenic enhancements. Numerical simulations}
author = {Perianez, R, Absi, A, Moreno, H P, Manjon, G, and Villa, M}
abstractNote = {A numerical model of the Odiel-Tinto estuary (Spain) has been developed to study the self-cleaning process that was evidenced from {sup 226}Ra 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 {sup 226}Ra 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.}
doi = {10.1016/j.scitotenv.2004.07.029}
journal = []
issue = {1-3}
volume = {339}
journal type = {AC}
place = {Netherlands}
year = {2005}
month = {Mar}
}