Abstract
A review is presented of some basic concepts and recent achievement concerning the modelling of transport of organic substances in groundwater. Organic pollutants are subjected to complexe physical, chemical and biological transformations while moving through the groundwater layers, such that no individual possesses a complete understanding of all the processes involved, and consequently the study of this subject becomes an interdisciplinary field of research. Recently, a large number of new developments have emerged giving new insight into processes as hydrodynamic dispersion, sorption, biodegradation and immiscible flow. It is concluded that considerable work has been done with respect to modelling of organic pollutant transport in groundwater, but a need to further developments remains necessary in order to put an effective stop to the very serious deterioration of the groundwater reserves.
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