【摘要】 应用非饱和土壤水分运动原理 ,对塑料暗管排水条件下分层土壤的水分运动进行了数值模拟 ,建立了数学模型。结果表明 ,模型计算的土壤水分分布结果和田间实测的土壤剖面水分数据一致 ,应用该模型可以确定出试验区在一定外界气象条件下不同地下水降落速度时农田的受渍情况更多还原

【Abstract】 Numerical simulation on moisture regime in heterogeneous soils under PVC subdrainage conditions was conducted and mathematical model was established based on the mechanism of unsaturated soil water dynamics in this paper.The results showed that soil water contents in profile calculated by the model well fitted the data obtained by in situ measurement.The field waterlogging situations could be determined at different falling rates of subsurface water table under any meterological boundary condition by use of the model.更多还原