摘要
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。
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.
出处
《灌溉排水学报》
CSCD
北大核心
2010年第2期17-21,共5页
Journal of Irrigation and Drainage
基金
国家自然科学基金项目(40671081)
关键词
非饱和土壤
水头
压力势
稳定入渗率
unsaturated soils
water head
pressure potential
relatively stable infiltration rate
