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以环刀法观测安家沟流域土壤的入渗过程,并测定土壤的理化性质。然后通过比较Horton、Kostiakov和Philip模型的模拟精度,确定利用Philip模型对土壤入渗进行模拟。根据标定原理,对Philip模型进行标定,并通过比较,选用标定效果更好的标定因子αA来标定模型。再利用土壤理化指标分别建立标定因子αA以及稳定入渗率A的转换函数,最后根据土壤理化性质的空间分布,利用已建立的转换函数,实现标定因子αA和稳定入渗率A的空间化。结果显示:初始含水量为0.1g/g时,αA在0.703~1.049mm/min~0.5之间;稳定入渗率在0.142~0.251mm/min之间。该研究实现了大尺度的土壤入渗的空间化。
The soil penetration process in Anjiagou watershed was observed by the ring-knife method, and the physico-chemical properties of soil were determined. Then by comparing the simulation accuracy of the Horton, Kostiakov and Philip models, we determine the simulation of soil infiltration using the Philip model. According to the principle of calibration, the Philip model is calibrated, and compared with the calibration factor αA with better calibration, the model is calibrated. Then the soil physical and chemical indicators were used to establish the transfer function of calibration factor αA and stable infiltration rate A, respectively. Finally, according to the spatial distribution of soil physical and chemical properties, the established transfer function was used to realize the spatialization of calibration factor αA and stable infiltration rate A. The results showed that αA was between 0.703 ~ 1.049mm / min ~ 0.5 when the initial water content was 0.1g / g, and the steady infiltration rate was between 0.142 ~ 0.251mm / min. This study achieved the spatialization of large-scale soil infiltration.