土石混合介质水分运动规律研究

Research on Water Movement Law of Stony-soil Media

通过一维垂直积水入渗试验，研究碎石含量与碎石粒径对土壤累积入渗量与湿润峰的影响，结果表明碎石的存在明显的促进水分的运动，在碎石含量为30％时，累积入渗量与湿润峰均达到最大，碎石粒径在5～10mm时，累积入渗量与湿润峰均达到最大，碎石含量对水分运动的影响程度要大于碎石粒径的影响程度；累积入渗量随入渗历时的变化过程与湿润峰随入渗历时的推进过程均可以利用Philip入渗模型进行描述。

One-dimensional vertical ponding infiltration experiment was performed in order to study the effect of rock fragment content and particle size on soil accumulative infiltration and wetting front, the resuits turn out to be that rock fragment could promote water movement significantly, the maximum of accumulative infiltration and wetting front appear when rock fragment content reach 30 % or particle size is 5-10 mm, the results also present that rock fragment content has a more obvious effect on water movement than rock fragment particle size; in addition, changing process of accumulative infiltration with infiltration duration and advancing process of wetting front with infiltration duration could be described by Philip infiltration model.