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ＳＵＰＧ（ＳｔｒｅａｍｌｉｎｅＵｐｗｉｎｄ／ＰｅｔｒｏｖＧａｌｅｒｋｉｎ）有限元法应用于土体的非饱和溶质运移问题，导出了其数值表达式，编制了计算程序．以一维入渗问题为例进行了数值计算，与其他方法及野外试验结果进行了对比，表明该方法是正确的、稳定的，可用于非饱和带溶质运移问题的实际计算．
SUPG (StreamlineUpwind / Petrov-Galerkin) finite element method is applied to the problem of unsaturated solute transport in soil, the numerical expression is derived and the calculation program is prepared. The numerical calculation is carried out taking the one-dimensional infiltration problem as an example, and compared with other methods and the field test results. It shows that the method is correct and stable and can be used to calculate the solute transport problem in unsaturated zone.