Ligero R A, Barrera M, Casas-Ruiz M
Departamento de Física Aplicada, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain.
J Environ Radioact. 2005;80(1):87-103. doi: 10.1016/j.jenvrad.2004.06.006.
This second part of the study reports the development of a model to describe the vertical migration of the artificial radioisotope (137)Cs in the sediment column on the seabed of the Bay of Cadiz. The application of the model provides an overall picture of the process of sedimentation in the Inner Bay of Cadiz. The spatial distribution of the rate of sedimentation enables us to study the sources of sediments and the means by which the sediments have been transported. A method has been derived from the rate of sedimentation to perform the dating of the layers of sediment. The model describes the behaviour of (137)Cs in the area under study, taking into account the time of residence in the zones that are the source of accumulation, the origin of the sedimentary material, together with the diffusion of the radionuclide in the sediment of the seabed.
本研究的第二部分报告了一个模型的开发，该模型用于描述人工放射性同位素（137）铯在加的斯湾海床沉积物柱中的垂直迁移。该模型的应用提供了加的斯湾内湾沉积过程的整体情况。沉积速率的空间分布使我们能够研究沉积物的来源以及沉积物的运输方式。从沉积速率推导出了一种方法来对沉积层进行年代测定。该模型描述了（137）铯在研究区域内的行为，考虑了在积累源区域的停留时间、沉积物质的来源以及放射性核素在海床沉积物中的扩散。
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