针对蓄水坑灌法中非均质单坑土壤水分问题 ,建立了数学模型 ,并采用 ADI(交替方向隐式 )差分法进行求解以模拟非均质土土壤水分运动规律。物理模型试验验证表明其与数值模拟结果基本相符 ,说明将此方法用于果树单坑灌溉入渗问题的研究是行之有效的 ,对促进果树灌溉技术的进一步研究具有重要意义 Aiming at the problem of soil moisture in heterogeneous single pit in water storage pit irrigation method, a mathematical model was established and ADI (Alternating Direction Implicit) difference method was used to simulate soil moisture movement in heterogeneous soil. The results of physical model tests show that it is in good agreement with the numerical simulation results, which shows that this method is effective for single-hole irrigation infiltration of fruit trees and is of great significance for further research on the irrigation technology of fruit trees