| 冻融条件下封闭体系中土壤水分运移规律模拟研究 |
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| 引用本文： | 郑琦宏,张殿发,宣亮.冻融条件下封闭体系中土壤水分运移规律模拟研究[J].宁波大学学报(理工版),2006,19(1):81-84. |
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| 作者姓名： | 郑琦宏 张殿发 宣亮 |
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| 作者单位： | 1. 宁波大学,建筑工程与环境学院,浙江,宁波,315211
2. 宁波市镇海区环境保护局,浙江,宁波,315200 |
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| 摘 要： | 中国北方大面积土壤经历冬冻春融的冻融循环,这种循环引起了土壤中水分的运移,在室内模拟大自然冻融条件下,分析了均质饱和土壤在不同冻融时间和土壤深度的水分含量,实验证明封闭体系中土壤水分存在明显的“两段式”的水分运移规律,即冻结时土壤中的水分向表面冻层迁移;融化时,由于地表蒸发,土壤中的水分叉向地表强烈迁移。
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| 关 键 词： | 土壤 冻融 水分 运移 |
| 文章编号： | 1001-5132(2006)01-0081-04 |
| 收稿时间： | 2005-09-07 |
| 修稿时间： | 2005年9月7日 |
Research on Mechanism of Soil Moisture Migration under Freezing and Thawing Condition |
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| ZHENG Qi-hong,ZHANG Dian-fa,XUAN Liang.Research on Mechanism of Soil Moisture Migration under Freezing and Thawing Condition[J].Journal of Ningbo University(Natural Science and Engineering Edition),2006,19(1):81-84. |
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| Authors: | ZHENG Qi-hong ZHANG Dian-fa XUAN Liang |
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| Institution: | 1. Faculty of Architectural, Civil Engineering and Environment, Ningbo University, Ningbo 315211, China; 2. Enviromental Protection Bureau of Zhenghai District, Ningbo 315200, China |
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| Abstract: | There is a cycle of freezing in winter and thawing in spring in north China soil,and this cycle causes migration of soil moisture.Based on the simulated freeze-thaw experiment,research is taken on mechanism of soil moisture migration in the condition of freezing and thawing.It demonstrates that there is an obvious "two-phase" migration mechanism: in the freezing process,moisture in the soil moves up to the freezing layer;and in the thaw process,this migration is intensified due to the surface evaporation. |
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| Keywords: | soil freeze-thaw moisture migration |
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