Abstract
In tracer tests in single fractures in fissured rock it is of interest to determine the concentration profile in the adjacent rock matrix. In the present note, concentration profiles in the rock matrix are calculated for the case of contaminant transport in a single fracture. Two different inlet boundary conditions are used: constant concentration and constant flux at the inlet of the fracture. An analytical solution is derived for the concentration in the fissure and the matrix for constant flux condition at the inlet. Concentration profiles are shown for different values of the sorption coefficient within the rock matrix and at different locations along the fracture. For low Petlet numbers, it is shown that the concentration in the matrix is strongly influenced by the inlet boundary condition.
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