A theoretical description of diffusion and migration of 137Cs in soil

被引：25

作者：

Likar, A

Omahen, G

Lipoglavsek, M

Vidmar, T

机构：

[1] Univ Ljubljana, Jozef Stefan Inst, Fac Math & Phys, Ljubljana 1000, Slovenia

[2] Inst Occupat Safety, Ljubljana, Slovenia

来源：

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY | 2001年 / 57卷 / 03期

关键词：

Cs-137; radiocaesium; soil; model; migration; Green's function;

D O I：

10.1016/S0265-931X(01)00019-4

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Careful measurements of activity concentrations of Cs-137 in soil samples taken layer by layer in autumn of 1999 in Slovenia are confronted with a prediction based on the diffusion-convection equation with a boundary condition which - unlike the boundary conditions applied in the literature so far - conserves the deposited activity over time, except for the natural decay. It is shown that it is essential to consider the deposits from atmospheric nuclear weapons tests and the Chernobyl accident to arrive at a good fit to the measured data. The corresponding Green's function as well as the diffusion constant and migration speed based on the analysis are given. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：191 / 201

页数：11

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