| 孙凯男,郭秋菊,程建平.我国部分地区土壤氡析出率的理论模型[J].中华放射医学与防护杂志,2004,24(6):581-584 |
| 我国部分地区土壤氡析出率的理论模型 |
| A theoretical model on radon exhalation from soil in some regions of China |
| 投稿时间：2003-10-10 |
| DOI： |
| 中文关键词: 土壤性质 氡析出率 理论模型 实地测量 |
| 英文关键词:Soil properties Radon exhalation rate Theoretical model |
| 基金项目: |
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| 中文摘要: |
| 目的 本研究旨在通过理论研究和实验验证初步建立我国部分地区土壤氡析出率的理论模型。方法 通过对氡在土壤中扩散理论的分析,建立土壤氡析出率数学模型,该模型考虑了土壤的镭含量、射气系数、孔隙度和含水饱和度等因素对氡析出率的影响。为验证此模型,我们在北京、贵阳和内蒙古3个不同土壤类型的地区,共30处进行了氡析出率及土壤相关物理性质的实际测量。结果 有近1/3的样品理论值与实测值吻合比较好。结论 实测结果初步显示出模型的有效性。笔者对误差分布规律及产生原因进行了分析,提出了今后土壤氡析出率模型的改进方向。 |
| 英文摘要: |
| Objective To establish a practical mathematical model for calculating radon exhalation rate from soil in some regions of China. Methods Based on soil radon diffusive theory,a model including the influences of soil radium content,emanation coefficient,soil porosity and moisture saturation on radon exhalation was established.To test the model,both field measurements on radon exhalation rate and laboratory experiments on related soil properties were carried out totally at 30 points in Beijing and other cities. Results About one third of the samples had very similar calculated values to their measured values.We also discussed the distribution of the errors as well as the reasons causing the errors,which would show direction for the improvement of the model. Conclusion In spite of the large uncertainties in the model which is influenced by so many factors,we can see considerabe validation of the model. |
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