| 周石,中尾正义,桥本重将,成田英器.积雪最低含水饱和度的野外测定[J].水利学报,2004,35(2):0029-0033 |
| 积雪最低含水饱和度的野外测定 |
| Field measurements of the irreducible water saturation in snow |
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| DOI： |
| 中文关键词: 雪 积雪 湿雪 含水率 含水饱和度 最低含水饱和度 |
| 英文关键词: snow wet snow water content snow pack water saturation irreducible water saturation |
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| 中文摘要: |
| 在野外对处于融化期的自然积雪的最低含水饱和度进行了测定。结果显示，当下渗水流流速在毛管力起着不可忽视作用的约3×10-8～1.39×10-7ms-1时，所对应的积雪平均含水饱和度为0.05～0.07。流速在约10-8ms-1以下时，达到最低含水饱和度，平均值为0.02～0.03。在毛管力起作用的范围内，积雪的不同层位的含水饱和度有较大差异，而且差异随流速的减小而显著增加。 |
| 英文摘要: |
| Measurements of the irreducible water saturation in snow were carried out using Denoth Dielectric Moisture Meter in the field.The result shows that, when the water flow rate ranges from 3×10-8ms-1 to 1.39×10-7ms-1 at which the capillarity cannot be ignored, the averaged water saturation is 0.05～0.07. When the flaw rate is less than about 10-8ms-1, the irreducible water saturation will occur and the averaged value will be 0.02～0.03. In the whole saturation range in which the capillarity takes effect, the water saturation varies significantly in different layers of the snow pack, and the difference increases remarkably as the flow rate decreases. |
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