基于大孔隙下渗理论的产流模型及其应用

闸述了大孔隙下渗机理和大孔隙流产生的条件，并结合土壤基质下渗以及大孔隙和土壤基质水分交换过程，建立了超渗产流模型．将该模型应用于滦河水系的柳河流域，估算了流域的产流量，推求了流域的径流过程．在模型的率定期和检验期，径流总量相对误差大部分在20％以内，Nash效率系数大部分超过70％，说明该模型可以用于以超渗产流模式为主要产流方式的流域径流模拟．

Runoff Generation Model Based on Macropore Infiltration and Its Application

Macropore infiltration mechanism and the conditions of macropore flow generation were introduced.Combining with soil matrix infiltration and the process of soil water interaction between macropore and soil matrix,an infiltration-excess runoff generation model was established.Then the model was applied in Liuhe basin,a sub-basin of the Luanhe river basin,to calculate the runoff volume and simulate the runoff processes. The results show that most of the relative errors of total volume were less than 20%, and Nash efficiency coefficients were more than 70% during the calibration and verification periods ,which indicates that this model can be used in runoff simulation where infiltration-excess runoff is the dominant runoff process.