摘要
基于室内垂直一维入渗试验,以杨凌塿土、长武黑垆土和安塞黄绵土3种典型黄土团聚体为研究对象,分析不同粒径的团聚体的水分运动过程。结果表明,一定入渗历时内,3种团聚体累积入渗量和湿润锋推进速率均随团聚体粒径的增大而减小。累积入渗量和湿润锋推进速率因团聚体土壤类型产生显著差异。Kostiakov公式及Philip方程均较好反映3种供试团聚体土壤的累积入渗量的变化。
Based on the one-dimensional vertical infiltration experiments in laboratory, three typical loessial aggregates （Yangling soil, Changwu soil and Ansai soil） were used to estimate the effect of aggregate sizes and soil types on the water movement process. The results showed that in a certain time, the cumulative infiltration and wetting front rate of the three different soil aggregates decreased with the increase of aggre- gate size. Bolh of Kostiakov equation and Philip equation could describe cumulative infiltration process ver- y well. Soil type of aggregate would have significant impacts on cumulative infiltration and wetting front advancing rate.
出处
《灌溉排水学报》
CSCD
北大核心
2013年第6期58-61,共4页
Journal of Irrigation and Drainage
关键词
团聚体
入渗
湿润锋
aggregate
infiltration
wetting front
