| 环境气候条件下土壤冻融过程中湿热耦合作用模型研究 |
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| 引用本文： | 宋存牛,张会云,杨富社.环境气候条件下土壤冻融过程中湿热耦合作用模型研究[J].干旱区地理,2009,32(3). |
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| 作者姓名： | 宋存牛 张会云 杨富社 |
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| 作者单位： | 长安大学理学院,陕西,西安,710064 |
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| 基金项目： | 两部交通建设科技项目，长安大学科技发展基金 |
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| 摘 要： | 基于Harlan模型和Darcy定律,综合考虑环境气候因素和水热特征参数对湿热迁移影响,建立了环境气候条件下季节性冻土区土壤冻融过程中湿热耦合作用模型.根据地表能量交换平衡原理推导出边界条件.依据实测数据回归分析出土壤湿热特征参数表达式.采用全隐式有限差分格式和TDMA迭代法对内蒙古锡林浩特地区冻结期间土壤湿热迁移规律进行了数值模拟.温度计算值和实测值比较一致,最大误差不超过2.5℃,说明该模型具有较高的准确性.利用该模型仅通过气象资料和湿热特征参数就可预测季冻区土壤冻胀和田间湿热分布状况并能够用来指导农田工程建设和农业生产.
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| 关 键 词： | 季节性冻土区 环境气候条件 湿热特征参数 土壤冻融 湿热耦合 |
Coupled model of moisture and heat reaction during soil freezing and thawing under environmental climate condition |
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| SONG Cun-niu,ZHANG Hui-yun,YANG Fu-she.Coupled model of moisture and heat reaction during soil freezing and thawing under environmental climate condition[J].Arid Land Geography,2009,32(3). |
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| Authors: | SONG Cun-niu ZHANG Hui-yun YANG Fu-she |
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| Institution: | SONG Cun-niu,ZHANG Hui-yun,YANG Fu-she (College of science,Chang' an University,Xi' an 710064,Shaanxi,China) |
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| Abstract: | Based on Harlan model and Darcy law,besides,synthetically considering effects of meteorological - environmental factors that include solar radiation,air convection,soil evaporation,etc,and effects of temperature gradient for water transfer,as well as effects of water and temperature for moisture - heat characteristic parameters, this paper establishes a mathematical model of coupled moisture and heat transfer during soil freezing and thawing under environmental climate condition.The upper boundary of moistu... |
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| Keywords: | seasonally frozen soil region environmental climate condition moisture - heat characteristics parameters soil freezing and thawing coupled moisture and heat |
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