| 表土低含水率条件下土壤非稳定蒸发研究 |
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| 引用本文： | 张瑜芳,蔡树英,蔡美娟.表土低含水率条件下土壤非稳定蒸发研究[J].武汉大学学报(工学版),1991(2). |
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| 作者姓名： | 张瑜芳 蔡树英 蔡美娟 |
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| 作者单位： | 武汉水利电力学院水利工程系
(张瑜芳，蔡树英)，武汉水利电力学院水利工程系(蔡美娟) |
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| 摘 要： | 本文论述了室内无出流和补给时低含水率条件下土柱蒸发试验。用水、汽、热耦合模型计算了土壤蒸发过程中水、汽运动规律,并进行了验证。文中讨论了温度梯度对土壤水,汽运动的影响,以及低含水率条件下土壤蒸发时蒸发面下移的规律。
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| 关 键 词： | 土壤蒸发 土壤温度 不饱和渗流 水汽输运 数值模拟 |
Research on Nonstationary Evaporatjon of Soil under the Condition of Low Moisture Content of Surface Soil |
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| Zhang Yufang Cai Shuying Cai Meijuan.Research on Nonstationary Evaporatjon of Soil under the Condition of Low Moisture Content of Surface Soil[J].Engineering Journal of Wuhan University,1991(2). |
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| Authors: | Zhang Yufang Cai Shuying Cai Meijuan |
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| Affiliation: | Zhang Yufang Cai Shuying Cai Meijuan |
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| Abstract: | This paper describes an experiment of soil evaporation on a soil column under the condition of zero flux at the bottom and process of soil drying and forming of drylayer observed in the course of evaporation. A coupled numerical model of water-vapor-heat transport is used for computing soil water and vapor movement under the condition of soil evoporation. The solution of numerical model is verified by the experiment. The effects of soil temperal gradient on water-vapor transport and the pattern of downward movement of the evaporation face are also discussed. |
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| Keywords: | soil evaporation soil temperature unsaturated flow water vapor transport numerical simulation |
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