Characterizing heterogeneity of water flow and solute transport in the porous media using dye tracer

In this study, the heterogeneous flow transport patterns are investigated in various soil stmctures to address the flow heterogeneity issue.The objectives are to investigate heterogeneity of soil water flow and solute transport, to characterize the heterogeneity information included in different water and the concentration distribution patterns, and to exam the dye tracer method to visualize flow paths.The experunents were carried out in four different soils.The dyed preferential pathways were observed in all the experiments.The lognmmal distribution was used to descxlbe the heterogeneity of water flow patterns.Compared with water flow, the concentration distributions show higher heterogeneity and uncertainty.