摘要
残膜的存在会使土壤湿润过程发生变化,从而对土壤的含水量和水分分布产生一定的影响。采用四元二次正交转动组合实验,对初始含水量、土壤干容重、残膜含量、残膜深度四种因素与湿润锋的关系进行分析探讨。结果表明,对湿润锋的影响作用次序为:土壤初始含水量>土壤干容重>残膜;随着土壤干容重和残膜量的增大,湿润锋迁移的持续时间逐渐延长,而随着初始含水量的增大呈线性下降趋势。在残膜超过150 kg/hm^(2)的情况下,湿润锋迁移的持续时间随土壤干容重的增大而趋于平稳;在土壤干容重超过1.41 g/cm^(3)的情况下,随着残族含量的增加湿润锋迁移的持续时间会减小。
The presence of residual film can change the soil wetting process,which has a certain impact on the soil water content and distribution.The relationship between initial water content,soil dry bulk density,residual film content,and residual film depth and the wetting front was analyzed and discussed using a combination of four dimensional quadratic orthogonal rotation experiments.The results showed that the order of influence on the wetting front was:initial soil moisture content soil dry bulk density residual film;With the increase of soil dry bulk density and residual film content,the duration of wetting front migration gradually prolonged,while with the increase of initial water content,there was a linear downward trend.When the residual film exceeds 150 kg/hm~2,the duration of wetting front migration tends to stabilize with the increase of soil dry bulk density;When the dry bulk density of soil exceeds 1.41 g/cm~3,the duration of wetting front migration decreases with the increase of residual film content.
作者
王芳佳
Wang Fangjia(Jiangxi Anlan Engineering Consulting Co.,Ltd.)
出处
《陕西水利》
2023年第6期100-102,共3页
Shaanxi Water Resources
关键词
残膜
水分入渗
土壤含水量
Residual membrane
water infiltration
soil moisture content
