农业工程学报2009，Vol.25Issue(10)：13-18,6.DOI:10.3969/j.issn.1002-6819.2009.10.003
大孔隙对土壤水分入渗特性影响的物理模拟试验
Physical simulation experiments of effects of macropores on soil water infiltration characteristics
摘要
Abstract
The different size sands and macropores' mold were used to simulate the same macropores' depth and different effective surface macropores, and a novel soil column was designed to observe the 3D infiltration of macropore flow under the condition of ponding water. The results showed that there was high correlation between the time when the wetting front turned to flush and stable and the effective surface macropore. The cumulative infiltration was in line with the Kostiakov model while its parameters were associated with the effective surface macropores. Under certain conditions, macropores connectivity played the dominant role for the preferential infiltration in soil. The presence of macropores could lead to typical change of the center profile's wet area. In the end, the study gave a quantitative concept for the center profile's wet area increment and its mathematical model with the effective surface macropores. The accuracy of the model verified by experiments can meet the requirments.关键词
入渗/土壤/水分/大孔隙/有效面孔隙度Key words
infiltration/ soils/ water/ macropores/ effective surface macropores分类
农业科技引用本文复制引用
吴继强,张建丰,高瑞..大孔隙对土壤水分入渗特性影响的物理模拟试验[J].农业工程学报,2009,25(10):13-18,6.基金项目
国家自然科学基金资助项目(50779055) （50779055）
