摘要
分析了土壤盐分运移的各种机理,在同时考虑水分和盐分运移温度效应的基础上,建立了非饱和土壤热、湿、气及盐分耦合运移的数学模型,继而通过数值计算考察了20 cm深的砂土中盐分运移温度效应的大小,结果显示: 5年后温度效应对4个不同深度处土壤溶液中盐分浓度的相对影响分别达7.8、4.8、0.8和0.34倍。
In the present paper, a thorough analysis was conducted on solute migration in soil. Based on previous work of us, a mathematical model has been developed in which the temperature effects on the transports of soil water and solute are taken in account. Numerical calculation showed that, five years later, the temperature effect might cause relative differences in soil solute concentration at four different depths of a soil-bed of 20 cm depth by 7.8, 4.8, 0.8 and 0.34 times.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2005年第4期647-649,共3页
Journal of Engineering Thermophysics
基金
国家重点基础研究发展规划资助项目(No.G2000026303)国家自然科学基金资助项目(No.50376015)教育部博士点基金资助项目(No.20040487037)中国博士后基金资助项目(No.2004036128)
关键词
土壤
水分运移
盐分运移
温度效应
数值计算
soil
water movement
solute movement
temperature effect
numerical investigation
