初始含水率对土壤中原油入渗的影响

为确定土壤初始含水率对原油在土壤中入渗的影响，该文利用3种土壤，根据设定不同初始含水率进行配置，开展土柱模拟试验，研究了不同初始含水率条件下原油在土壤中的入渗。试验结果表明：对于同一质地土壤，随着初始含水率的增加，原油在土壤中入渗的湿润距离和湿润推进速率均增加。原油在土壤中的入渗与土壤粉粒含量密切相关，当土壤初始含水率较低时，不同质地土壤，粉粒含量越高，原油在土壤中入渗越慢；随土壤深度增加，土壤中原油残留物的含量呈波动递减趋势；原油在土壤中入渗的湿润距离随时间的变化可用对数函数拟合，湿润推进速率与时间的关系可用Kostiakov公式拟合。

Effect of initial soil water content on crude oil infiltration into soils

To investigate the effect of initial soil water content on crude oil infiltration in soil, the crude oil infiltration experiments in three types of soils under different soil water content was conducted. The change of different soil water content in response to the change of infiltration was studied. Results indicated that the crude oil advance distance and the rate of advance increased with increasing of initial soil water content for a given soil type. When the initial soil water content was low, the content of silt would decelerate the crude oil infiltration process. The amount of residues left in the soils decreased with fluctuation while the soil depth increased. The relationships between the advance distances and infiltration time can be well described by a logarithmic function, while the rate of advance can be well fitted by Kostiakov function. The study provided some information for the remediation of contaminated soil.