Vertical and horizontal fluxes of plutonium and americium in the western Mediterranean and the Strait of Gibraltar

Vintró, Luis León; Mitchell, P.I.; Condren, O.M.; Downes, A.B.; Papucci, C.; Delfanti, Roberta

doi:10.1016/s0048-9697(99)00126-6

Cited by 50 publications

(27 citation statements)

References 17 publications

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“…The smallest SR is obtained in some areas of the Strait of Gibraltar and the Alborán Sea, where larger currents are present in the lower layer and/or stronger tidal currents exist. These values are in agreement with [4].…”

Section: Resultssupporting

confidence: 92%

Modelling radioactivity dispersion in the Alborán Sea, western Mediterranean

Periáñez

2009

Radioprotection

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Abstract.A numerical model which simulates the dispersion of non-conservative radionuclides in the Alboran Sea has been developed. Water currents are obtained from two hydrodynamic models working on the same domain: a 2D depth-averaged model is used two calculate tides and a 2-layer has been applied to obtain the residual (mean) circulation. The output of the hydrodynamic models is first applied to calculate suspended particle concentrations and sedimentation rates over the domain, which are also required by the radionuclide transport model. This assumes that radionuclides may be present in three phases: dissolved, suspended matter and bed sediments. Exchanges between the liquid and solid phases are described through kinetic transfer coefficients. The model has been applied to simulate the dispersion of 137-Cs and 239,240-Pu introduced in the sea from atmospheric fallout. Measured and computed radionuclide concentrations in the water column and in bed sediments are, in general, in good agreement.

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Section: Resultssupporting

confidence: 92%

Modelling radioactivity dispersion in the Alborán Sea, western Mediterranean

Periáñez

2009

Radioprotection

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“…However, despite such effects, it seems that, generally speaking, the present models give a representation of the Alboran Sea tides and circulation that is realistic enough to implement on it the sediment and pollutant transport models. [76], who found suspended particle concentrations below 0.5 g/m 3 in several stations sampled in the Strait of Gibraltar and Alboran Sea (exact values of concentrations are not reported in such paper). e plumes of the two main rivers, Guadiaro and Guadalhorce (see Figure 5), may be appreciated in both layers.…”

Section: Alboran Seamentioning

confidence: 93%

“…A simulation over 20 years has been carried out for 239,240 Pu. e atmospheric deposition has been compiled from [76,78], and zero activity concentrations in all phases are considered as initial conditions for the simulation. For both radioisotopes, concentrations in in�owing waters are speci�ed [77] and a zero gradient boundary condition is applied where out�ow occurs.…”

Section: 13mentioning

confidence: 99%

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Water Circulation, Sediment Transport, and Pollutant Dynamics in Southern Iberia Waters: A Review on Numerical Modelling Studies

Periáñez

2013

ISRN Oceanography

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Southern Iberian Peninsula coastal waters have a high ecologic and economic value. e objective of this work has consisted of describing numerical models which simulate the dispersion of particle-reactive tracers in these waters and reproducing measured concentration levels in water and bed sediment samples. Additionally, information on suspended matter concentration distributions and sedimentation rates is obtained. In the Alboran Sea, the model has been applied to simulate the transport of radionuclides introduced from atmospheric fallout. Transport pathways of heavy metals discharged from three rivers draining a large mining area have been obtained for the Gulf of Cadiz. It has been found that these rivers constitute a source of trace elements to the Mediterranean through the Strait of Gibraltar. Some characteristic times have been calculated, as well as �uxes of isotopes through the Strait of Gibraltar, as additional results of environmental interest.

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“…However, these processes are neglected in the present study since suspended matter concentrations are very low in the area, typically 0.1e0.5 mg/L (León-Vintró et al, 1999). Also, since the pycnocline is acting as a barrier for vertical mixing, interactions of pollutants with bed sediments can be neglected.…”

Section: Particle-tracking Dispersion Modelmentioning

confidence: 99%

Modelling surface radioactive spill dispersion in the Alborán Sea

Periáñez¹

2006

Journal of Environmental Radioactivity

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Vertical and horizontal fluxes of plutonium and americium in the western Mediterranean and the Strait of Gibraltar

Cited by 50 publications

References 17 publications

Modelling radioactivity dispersion in the Alborán Sea, western Mediterranean

Modelling radioactivity dispersion in the Alborán Sea, western Mediterranean

Water Circulation, Sediment Transport, and Pollutant Dynamics in Southern Iberia Waters: A Review on Numerical Modelling Studies

Modelling surface radioactive spill dispersion in the Alborán Sea

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