[1]CAO Chengpeng,ZHANG Fei,DUAN Jianming.Study on the Dynamics Model of Horizontal Migration of Interflow in Cropland in Black Soil Area[J].Research of Soil and Water Conservation,2019,26(04):259-264.
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Study on the Dynamics Model of Horizontal Migration of Interflow in Cropland in Black Soil Area
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 04
Page number:
259-264
Column:
Public date:
2019-06-11
- Title:
- Study on the Dynamics Model of Horizontal Migration of Interflow in Cropland in Black Soil Area
- Keywords:
- black soil region; sloping farmland; plough pan; interflow; simulation model
- CLC:
- S152.7;P481
- DOI:
- -
- Abstract:
- In order to solve the problem of interflow model establishment in sloping farmland under the influence of plough pan in black soil region of China, we used the Richard model to simulate soil water vertical migration in and above plough pan, and then setup mechanism interflow model based on Richard model, dynamic wave model and double super model. The measured data were obtained by the artificial rainfall experiments to reveal the function of the main factors on interflow. When the soil texture is fixed, slope gradient is the key factor to determine the interflow intensity. With the increase of slope gradient, the interflow rate increased significantly. The initial soil moisture content and rainfall intensity had greater impact on interflow occurrence time, but had little effect on the runoff volume. The interflow rate was much lower than that of soil surface runoff, the contribution of the interflow to soil nutrient transfer was higher than that of soil surface runoff. The simulated data agreed with the measured data, the RMSEs were 0.136 ml/min and 0.138 ml/min, R2 was 0.89 and 0.92, respectively. The model can reflect the interflow process. It is reasonable to assume the interflow infiltration capacity as the basis of interflow calculation in soil, which can solve the problem of how to use Richard model to calculate the lateral flow under the soil moisture vertical infiltration in the plough pan.
- References:
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1900-01-01