摘要
对我国北方冻结土壤的水、盐、热运动进行了分析,建立了相应的数学模型,提出了用热量平衡法确定田间实际气候条件下大气与土壤交界处的水、热边界条件的方法,并用有限差分法进行了模拟计算。田间试验结果表明,该模型和计算方法是可信和合理的。
The water-salt-heat movements during soil freezing and thawing are ana- lyzed.A mathematical model is then presented.The water and heat flow boundary conditions are determined with the method of energy conservation.The finite differ- ent method to solve the model is proposed.The model is validated with field data from Nov.1986 to May 1987 at Hetao Irrigation Scheme,Innermogonlia.
基金
国家自然科学基金
关键词
冻结土壤
数值模拟
水分
盐分
温度
soil freezing and thawing
coupled movement of water-salt-heat
method of energy conservation
numerical simulation
