| 王金生,杨志峰,王丽,李书绅.溶质在细粒孔隙介质中迁移预测的可靠性分析[J].水利学报,2001,32(9):0016-0022 |
| 溶质在细粒孔隙介质中迁移预测的可靠性分析 |
| Safety analysis of solute transport prediction in clay |
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| DOI： |
| 中文关键词: 包气带 含水层 对流弥散 预测 核素 |
| 英文关键词: unsaturated zone aquifer convection-dispersion prediction radionuclide |
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| 中文摘要: |
| 在预测溶质运移，尤其是低中放废物处置场中的核素在包气带与含水层中的迁移时，需要考虑介质中不流动水体的影响，否则，会影响预测结果的可靠性。通过对黄土的物理特性实验与野外氚的包气带示踪试验表明：用孔隙度或含水量除以渗透流速得到的平均孔隙流速比实际平均孔隙流速小，在包气带中约小30%～65%，含水层中约小40%.用对流弥散模型计算氚在包气带中的迁移表明：考虑不流动水体的影响时的平均孔隙流速比不考虑的结果增加了1.39倍，相对浓度减弱了1.32倍。 |
| 英文摘要: |
| The effect of immobile water volume in porous medium on radionuclide transport of radioactive waste disposal in saturated-unsaturated zone is studied. The experimental studies on physical property of loess and field tracer migration of tritium(3H) show that the average pore water velocity, which is the result of porosity or water content divided by flux of water, is smaller than actual average pore water velocity. The calculation result of tritium transported in unsaturated zone using convection-dispersion model demonstrates that the actual porous velocity is higher than that without considering the immobile volume by 1.39 times. |
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