Only one slider is used to adjust the parameters: space [], time [], the flow velocity [], the hydrodynamic dispersion coefficient [] ( is dispersivity []), the first-order reaction rate [], and the frame length [].

The model is described by the partial differential equation subject to the conditions , , .

For a fixed time parameter, the space determines black points on the orange curve and on the blue curve , so that you can see the corresponding numerical values. Smilarly for any parameter the precise values of the steady state and transient dimensionless concentrations are available.