Boone F W, Kantelo M V, Mayer P G, Palms J M
Health Phys. 1985 Apr;48(4):401-13. doi: 10.1097/00004032-198504000-00002.
Measured 129I concentration profiles in southeastern United States soil are examined by means of a six-compartment model to estimate accumulation and downward migration in undisturbed surface soil. Effective mean residence half-times in the top 30-cm-depth interval averaged 30 +/- 6 y, based on estimated annual 129I deposition rates in the vicinity of a chemical separations facility for nuclear material over a 25-y period. The model demonstrates the need for subdividing the soil into small depth intervals of 5 cm or less near the surface. The results of this study differ significantly with other surface soil residence time studies where a large single depth interval was assumed. The conclusions do, however, compare favorably with distribution coefficient studies in the surface hydrosphere. Application of the results are graphically demonstrated.
通过一个六室模型对美国东南部土壤中测量的¹²⁹I浓度剖面进行了研究，以估计未扰动表层土壤中的积累和向下迁移情况。根据核材料化学分离设施附近25年期间估计的¹²⁹I年沉积速率，在顶部30厘米深度区间的有效平均停留半衰期平均为30±6年。该模型表明，需要将土壤在地表附近细分为5厘米或更小的小深度区间。本研究结果与其他假设单个大深度区间的表层土壤停留时间研究有显著差异。然而，这些结论与表层水圈中的分配系数研究结果比较相符。以图形方式展示了研究结果的应用。
