中文摘要：

为简化膜孔灌入渗量的数值计算,将膜孔入渗量分解为垂直入渗量和膜孔侧渗量,引入单位膜孔周长侧渗量计算膜孔侧渗量。采用HYDRUS-1D/3D软件对土壤垂直一维入渗特性和膜孔入渗特性进行数值模拟,利用模拟结果分析单位膜孔周长侧渗量与垂直一维入渗的影响因素及其入渗系数,结果表明：膜孔直径对单位膜孔周长侧渗量影响微弱,可忽略其对单位膜孔周长侧渗量的影响;土壤质地对相对吸渗率（单位膜孔周长侧渗量的吸渗率与垂直一维入渗的吸渗率的比值）和相对稳渗率（单位膜孔周长侧渗量的稳渗率与垂直一维入渗的稳渗率的比值）影响均较大,相对吸渗率随初始含水率增大而略有减小,减小幅度为5.49%～24.72%,灌溉水深对其影响较小,最大变化幅度为21.80%;相对稳渗率随灌溉水深增大而增大,增大幅度为2.55%～42.76%,初始含水率对其影响微弱,最大变化幅度为2.94%。据此,建立侧向入渗系数与垂向入渗系数间的函数关系式,提出包括膜孔直径、灌溉水深、垂直一维吸渗率和饱和导水率的膜孔灌入渗量简化计算模型,实现由垂直一维入渗参数确定膜孔入渗参数的可能。利用室内垂直一维入渗和膜孔入渗试验及已有文献资料验证所建模型的可靠性,结果表明,所建模型计算值与实测值一致性较好（R2≥0.995,P〈0.001）,平均相对误差在5%左右（4.84%～6.81%）。所建模型仅有2个待定系数,只需垂直一维入渗和膜孔入渗2组试验数据即可推求,试验设计简化,可为准确预测膜孔灌入渗特性提供参考。

英文摘要：

In order to simplify the numerical calculation of cumulative infiltration capacity under film hole irrigation, the film hole cumulative infiltration was decomposed into vertical infiltration capacity and lateral infiltration capacity, and lateral infiltration capacity of unit film hole perimeter was introduced to calculate film hole lateral infiltration capacity. The soil vertical one-dimensional infiltration characteristics and film hole infiltration characteristics were simulated by using HYDRUS-1D/3D software. According to the simulation results, the influence of film hole diameter on lateral infiltration capacity of unit film hole perimeter was analyzed. It was found that the film hole diameter had little impact on lateral infiltration capacity of unit film hole perimeter, and its impact on lateral infiltration capacity of unit film hole perimetercould be ignored. At present, the influence factors of one dimensional infiltration and film hole diameter on lateral infiltration capacity of unit film hole perimeter was the soil texture, initial moisture content and irrigation water depth. Based on this, the vertical one-dimensional infiltration depth and lateral infiltration capacity of unit film hole perimeter were quantitatively analyzed by using Philip infiltration model, and the influence of soil texture, initial moisture content and irrigation water depth on lateral infiltration coefficient and vertical one-dimensional infiltration coefficient were studied. The results showed that the soil texture had large impact on both the relative sorptivity rate（the ratio of sorptivity rate of lateral infiltration capacity of unit film hole perimeter to sorptivity rate of vertical one dimensional infiltration） and the relative steady infiltration rate（the ratio of steady infiltration rate of lateral infiltration capacity of unit film hole perimeter to steady infiltration rate of vertical one dimensional infiltration）, the relative sorptivity rate decreased slightly with the increase of initial moisture content,