Now, there is Diffusion Models of Environmental Transport, which provi des more than 40 analytical models of diffusion and advective-diffusio n in one, two, and three layer systems, subject to a wide range of bou ndary and initial conditions. This text illustrates applications to co ntaminant transport in sediments and soils, including porewater and va por transport, and also provides Mathcad spreadsheets to aid in the us e of these models. The authors supply complete details of the solutio ns to the models for those who wish for a deeper understanding. For ot hers, who do not have the time...