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为了揭示土壤容重对深层坑渗灌入渗量的影响规律,通过室内均质土模拟试验,采用非线性回归法对试验数据进行分析;建立了以土壤容重为参数深层坑渗灌的Kostiakov和Philip改进模型,并进行了验证。结果表明:入渗时间相同时,入渗量随着土壤容重的增大而减小;Kostiakov入渗模型和Philip入渗模型都适用于模拟深层坑深灌的入渗过程,相关系数均在0.99以上;建立的2个改进模型计算精度均很高,效率系数分别为99.7%和99.9%。相比较而言,深层坑渗灌的Philip模型具有一定的理论依据,计算精度较高且模拟效果好,可作为计算深层坑渗灌入渗量的有效模型。
In order to reveal the influence law of soil bulk density on the infiltration of deep pit seepage infiltration, through the indoor homogeneous soil simulation test, the non-linear regression method was used to analyze the experimental data. Kostiakov and Philip Improve the model and verify it. The results show that the infiltration rate decreases with the increase of soil bulk density under the same infiltration time. Both the Kostiakov infiltration model and the Philip infiltration model are suitable for simulating the infiltration process of deep pit deep irrigation with correlation coefficients of 0.99 The accuracy of the two improved models are very high. The efficiency coefficients are 99.7% and 99.9% respectively. In contrast, the Philip model of deep pit infiltration has a certain theoretical basis, the calculation accuracy is high and the simulation effect is good, which can be used as an effective model to calculate the infiltration of deep pit infiltration.