Estimating solute transport parameters with boundary layer method is a reliable and simple method, but how to determine the position of the boundary layer is the key factor to limit its the application. Because the boundary layer of the brilliant blue dye in soil is very clear and easy to be determined, the feasibility of indicating the boundary layer of Cl~- using the brilliant blue dye is studied in this paper. The results show that the transport law of the brilliant blue dye is similar to that of the Cl~...
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