| 地下水浅埋条件下越冬期土壤水热迁移的数值模拟 |
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| 引用本文： | 雷志栋.地下水浅埋条件下越冬期土壤水热迁移的数值模拟[J].冰川冻土,1998,20(1):51-54. |
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| 作者姓名： | 雷志栋 |
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| 作者单位： | 清华大学水利水电工程系，内蒙古水利科学研究院 |
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| 摘 要： | 应用土壤冻融过程中水热耦合迁移模型，对内蒙古河套灌区地下水浅埋条件下整个土壤冻融过程进行了模拟，分析了越冬期土壤水热迁移规律．结果表明，快速冻结阶段土壤冻结速度随深度线性减小．冻结过程中某一深度处的含水量增量与冻结速度呈双曲线型相关关系．提出了土壤冻融过程中的特征含水量概念，以描述土壤含水量的动态变化特征．
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| 关 键 词： | 地下水 越冬期 土壤 水热迁移 冻土 数值模拟 |
Numerical Simulation on Simultaneous Soil Moisture and Heat Transfer under Shallow Ground Water Table in Winter |
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| Abstract: | Using the model of simultaneo us moisture and heat transfer during soil freezing and thawing, a numerical sumulation is carried out to the whole course of freezing and thawing in Hetao irrigation areas in Inner Mongolia Autonomous Region. Moisture and heat transfer is analyzed based on the simulation. The result shows that freezing speed decreases linearly with soil depth. The increment of water content during soil freezing at a certain depth correlates with freezing speed in hyperbolic style. A concept of typical water content during soil freezing and thawing is proposed to describe the change of water content. |
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| Keywords: | soil freezing and thawing simultaneous soil moisture and heat transfer typical soil water content numerical simulation |
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