摘要
通过对淹灌条件下砂质壤土的盐水入渗试验，以传递函数模型作为数学模拟的工具，探讨了对流占优运移机制下土壤盐分的迁移特征，得到了盐分在４５ｃｍ土层的迁移时间概率分布函数与迁移时间概率密度函数及土壤盐分平均孔隙流速和水动力弥散系数，进行了盐分出流过程的数学模拟，同时对描述稳定流场中土壤盐分对流迁移特征的有关参量进行了初步分析。
In this paper, the soil columns(repacked sieved sandy loam, different dry density, 15 3 cm diam ×50 cm long)were irrigated at constant ponded infiltration intensities with a step change in NaCl solution The transfer function model(TFM)developed by Jury et al(1982)was used for simulating chloride travel through the soil columns during steady, saturated water The transport parameter values for the soils were determined by TFM(with an assumed lognormal distribution of travel times) The simulations were tested against experimental values of drainage effluent concentration In addition, the characteristic values of convective transport of chloride in soils were analyzed
出处
《水科学进展》
EI
CAS
CSCD
北大核心
1999年第2期107-112,共6页
Advances in Water Science
基金
"九五"国家重点科技攻关项目
关键词
稳定流场
饱和土壤
盐分迁移
传递函数模型
模拟
steady flow condition
saturated soil
chloride travel
transfer function model
simulation
