非饱和土壤有压和无压入渗稳定入渗率间的关系研究

基于非饱和土壤有压和无压入渗试验,分析了土壤有压积水入渗与无压入渗相对稳定入渗率之间的数量关系。结果表明,同一土壤质地条件下,非饱和土壤有压积水入渗的相对稳定入渗率随入渗水头的增加而增大,它们之间呈线性关系;土壤水动力学理论和试验数据都证明了土壤有压和无压入渗相对稳定入渗率间存在确定的数量关系。研究结果可为非饱和土渠床渗漏损失水量的数值模型计算提供依据。

The Quantitative Relation of Stable Infiltration Rates between the Pressured and Non-pressured Water Infiltration in Unsaturated Soils

Based on the pressured water infiltration experiments of unsaturated soils under different water head,the quantitative relation of the relatively stable infiltration rates between the pressured and non-pressured water infiltration into unsaturated soils was analyzed.The experimental results indicate that under the condition of the infliction of the same soil texture,the infiltration capacity of unsaturated soils increases with the increasing water head,the relationship conformed to the linear function,the theory of the soil water dynamics and the infiltration experiments have testified the assured linear relationship about the relatively stable infiltration rates between the pressured and non-pressured water infiltration into unsaturated soils.The results would provide a support for the estimating of unsaturated earth canal seepage loss by numerical simulation models.