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为弄清不同溶质对流条件下溶液扩散区域水动力结构形成的机理，在变浓度ＮａＣｌ溶液投入渗流水槽试验的基础上建立了水动力宏观弥散数模。分析表明，溶质对流分成若干段后引起的漩涡对变溶质流起主导作用；同时发现，溶液沿流体混合的速度大为加快；而且这一过程的作用大大提高动水扩散的效应。此特点对弄清高浓度污染物在地下水流中扩散机理和海水入侵等实际问题很重要。
In order to clarify the formation mechanism of hydrodynamic structure in solution diffusion zone under different convection conditions, a macroscopic dispersion model of hydrodynamic force was established on the basis of the experiment of changing the concentration of NaCl solution into seepage tank. The analysis shows that the vortex caused by the convection of solute conveys several revolutions and leads to the change of solute flux. At the same time, it is found that the mixing speed of the solution along the fluid is greatly accelerated; and the effect of this process can greatly enhance the effect of hydrodynamic diffusion. This feature is very important to understand the practical problems of diffusion mechanism of high concentrations of pollutants in groundwater flow and seawater intrusion.