Periáñez R
Departamento Física Aplicada I, E.U. Ingeniería Técnica Agrícola, Universidad de Sevilla, Ctra., Utrera km 1, 41013 Sevilla, Spain.
J Environ Radioact. 2008 Apr;99(4):694-715. doi: 10.1016/j.jenvrad.2007.09.011. Epub 2007 Nov 26.
A model for simulating the dispersion processes of 137Cs and 239,240Pu in the Alborán Sea is described. The model consists of two hydrodynamic models: a 2D depth-averaged model and a two-layer model which provide tidal and geostrophic currents, respectively; a sediment transport model which provides suspended particle concentrations and sedimentation rates over the domain; and the radionuclide dispersion model including interactions of dissolved radionuclides with suspended particles and bed sediments. These processes are formulated using kinetic transfer coefficients. The hydrodynamic and sediment models are run and validated in advance, and their results are then used to simulate the dispersion of 137Cs and 239,240Pu, which are introduced from atmospheric fallout. Radionuclide concentrations in the water column and distributions in bed sediments have been compared with measurements in the sea. Both set of data are, in general, in agreement. The model has also been applied to calculate radionuclide fluxes through the Strait of Gibraltar. These computed fluxes have been compared with previous estimations as well.
描述了一个用于模拟137铯和239、240钚在阿尔沃兰海扩散过程的模型。该模型由两个水动力模型组成：一个二维深度平均模型和一个两层模型，分别提供潮汐流和地转流；一个沉积物输运模型，提供该区域内的悬浮颗粒浓度和沉积速率；以及放射性核素扩散模型，包括溶解的放射性核素与悬浮颗粒和床底沉积物的相互作用。这些过程使用动力学转移系数来表述。水动力模型和沉积物模型预先运行并经过验证，然后其结果用于模拟大气沉降引入的137铯和239、240钚的扩散。水柱中的放射性核素浓度和床底沉积物中的分布已与该海域的测量结果进行了比较。总体而言，两组数据相符。该模型还被用于计算通过直布罗陀海峡的放射性核素通量。这些计算出的通量也已与先前的估计值进行了比较。
