中文摘要：

对北京市大兴区3种典型土壤的水分入渗规律及其影响因素进行试验研究。用双套环法田间现场测定了大兴区11个试验点的土壤水分入渗过程,运用经验模型对各试验点的入渗曲线进行拟合。结果表明：入渗过程达到稳定的时间由快到慢依次为壤质砂土、砂质壤土和粉砂壤土;初始含水率与入渗初始阶段的速率呈线性相关关系;土壤结构和干扰等条件基本一致的前提下,稳定入渗率由大到小依次为壤质砂土、砂质壤土和粉砂壤土;土壤质地大致相同的条件下,土壤容重越大,其稳定入渗率越小。总体上,Horton入渗模型在该研究区域适用性较好。

英文摘要：

The infiltration process and its influencing factors of 3 typical soils in Daxing District, Beijing were studied. Double-ring method was used to measure the soil infiltration curves of 11 sites. At the same time, the infiltration curves were developed with empirical models. The result shows that the infiltration process in the loamy sand reaches stable fastest, and it takes a longer time to reach stable in the sandy loam, and the silty loam reaches stable the slowest; there is a linear correlation between the initial water content and the initial infiltration rate; under the similar soil structure and disturbed condition, the stable infiltration rate of the loamy sand is the biggest, the sandy loam takes the second place, and the stable infiltration rate of the silty loam is the smallest; under the similar soil texture, the stable infiltration rate decreases with the increase of the bulk density; Horton infiltration model can be used in the study area.