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地下水污染系统，一般由非饱和带与饱和带两子系统组成，潜水面为两者的界面。已有的模拟试验多对其进行分段研究，认为污染物在系统中的运移规律为两者中的叠加。由于系统中存在界面过程和子系统间的相互作用，整个系统即饱和─非饱和带联合试验研究的结果较分段模拟结果更客观地反映污染物在系统中的运移规律；且这种联合研究在数学处理上也具有一定的优势。因此，饱和─非饱和流溶质运移的联合研究更值得重视。
Groundwater pollution system, generally by the unsaturated zone and saturated with two subsystems, the diving surface for the two interfaces. Some simulation tests have done more researches on them, and think that the migration rule of pollutants in the system is the superposition of the two. Due to the existence of interfacial processes and interaction between subsystems in the system, the results of the joint-saturation-unsaturated zone experimental study of the whole system reflect the transport of pollutants in the system more objectively than the results of the subsection simulation. And this joint study In mathematical processing also has some advantages. Therefore, the joint study of solute transport in saturated-unsaturated flow is more important.