The experimental study is designed to observe the flow process by use of morphological method in different kind of soils . macropore geometry is subsequently characterized by using fractal dimensions of staining patterns on horizontal cross - sections . the results prove that water flow in structured clay soils is strongly influenced by the presence of macro - pores and their geometries 为了更深入地了解物质在多孔介质中的运移，本论文进行了土柱模拟实验，将含颜料的水分渗入不同类型的土壤中，然后对其不同深度的剖面进行观察，并且进行了图像分析，发现颜料的分布满足分形特征，水分在土壤中的运移存在优势流现象，受到大孔隙的影响很大，这与上述随机模拟的结果是一致的。
