Data of ¹³⁷Cs measurements in the Kiev Reservoir after the Chernobyl accident were used for comparison of simulation results of two multi-chamber models of radionuclide migration in reservoirs. One of the models uses two-chamber approach to describe exchange processes between the water column and bottom sediments and the other uses three-chamber approach. It is revealed that the adequate results for short time periods (8–10 days) typical for the estimates during the “acute” period after an accident were provided by a three-chamber model only. On medium timescales (6 months), both models showed adequate results, although the accuracy of the three-chamber model was also better. However, the two-chamber model is also a reasonable choice, because input data required for the three-chamber model can be unavailable or not reliable enough. The impact of the spatial inhomogeneity of the values of some migration parameters on simulation accuracy was also analyzed.

中文翻译：

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使用各种深度模型对基辅水库的放射性污染进行后播

^137的数据切尔诺贝利事故后在基辅水库中的Cs测量用于比较储层中两个放射性核素迁移的多室模型的模拟结果。其中一个模型使用两室方法来描述水柱和底部沉积物之间的交换过程，而另一种模型则使用三室方法。结果表明，事故发生后的“急性”时期通常在短时间内（8-10天）获得足够的估算结果，而这种估算仅由三室模型提供。在中等时间尺度（6个月）上，两个模型都显示出足够的结果，尽管三腔模型的准确性也更高。但是，两腔室模型也是一个合理的选择，因为三腔室模型所需的输入数据可能不可用或不够可靠。