Research on water movement and solute transport in layered soil has beenconcentrated on clay layer, however, less work has been done on soil with sand layerespecially on salt movement characteristics under this condition.

• 关于层状土中水分运动和溶质运移的研究，目前主要集中在研究粘土夹层的情况，对于沙土夹层的研究较少，特别是在该情况下的盐分运动特性研究更少。