东北黑土区非饱和土壤水分运动数值模拟研究

Numerical simulation of unsaturated soil water movement in black soil area of the Northeast China

根据非饱和土壤水分运动基本理论,建立一维运动数学模型,采用有限差分法计算,对东北黑土区非饱和土壤水分一维运动进行数值模拟研究。经Warrick试验验证,模拟结果和实际测量值的相对误差小于0.001,该模型可以模拟东北黑土区非饱和土壤水分在垂直剖面上的分布情况。

According to the theory of the unsaturated soil water movement, we set up the one - dimensional motion mathematical model, and adopt the the finite difference method. Then we make the numerical simu- lation of unsaturated soil water movement in black soil area in Northeast and conduct the experimental veri- fication Warrick. Finally through the comparison simulation results with measured data, it shows that this model can simulate the distribution Of the unsaturated soil water in black soil area in Northeast in the verti- cal profiles.