| 王文焰,张建丰,汪志荣.γ透射法测量土壤含水量的层间分辨率实验研究[J].水利学报,2004,35(8):0085-0089 |
| γ透射法测量土壤含水量的层间分辨率实验研究 |
| Experimental study on spatial resolution of soil water content measured by γ-ray attenuation method |
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| DOI： |
| 中文关键词: γ透射法 土壤含水量 分辨率 精度 |
| 英文关键词: gamma-ray attenuation method soil water content spatial resolution measuring accuracy |
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| 中文摘要: |
| 室内的系统实验研究表明，采用γ透射法测量土壤含水量时，在探头的前端设置铅屏蔽罩对提高层间分辨率及测量精度极为有效。铅屏蔽罩厚度0～23.5mm及准直孔径4～12mm的组合试验资料分析表明，铅屏蔽罩厚度为4～10mm，准直孔径为10mm左右即可在满足测量精度不低于3%的前提下层间分辨率达到22mm。 |
| 英文摘要: |
| The effects of thickness and collimator diameter of the lead probe shield on spatial resolution of soil water content measured by γ-ray attenuation method was studied experimentally. The result shows that the resolution is 22mm with measurement error smaller than 3% when thickness of lead shield is 4～10mm and collimator diameter is 10mm. |
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