THEORY OF SOLUTE TRANSPORT BY GROUNDWATER.

The transport of solutes in groundwater flow has been studied with increasing intensity in the last two decades as a result of growing concern about water quality and pollution. This review focuses mainly on the theoretical development of the transport theory, with the field data only briefly recalled to illustrate salient points. Furthermore, the discussion is limited to the transport of inert solutes at low concentrations, which do not decay or interact with the solid matrix, nor do they influence fluid properties. Because of space limitations, neither numerical approaches (e. g. Smith & Schwartz 1980) nor the many outstanding problems are reviewed here.