Physical modelling of contaminant transport processes

The objective of any modelling exercise is one of simulation and prediction. In the particular case of subsurface containment transport, modelling provides valuable information about the spread and growth of pollutant plumes, and the effectiveness of various containment strategies. Modelling can thus offer much assistance in identifying the optimum course for environmentally sound waster management.

Various types of models are available. These include physical models, where a scaled model is tested in the laboratory or field; analogue models, where the process under examination is replaced by a process that behaves in a similar manner; and mathematical models where the process is reduced to a set of governing equations, which are subsequently solved using either analytical or numerical methods.

This paper describes a physical modelling technique, namely centrifuge modelling, that has the potential to provide worthwhile assistance in the investigation of many contaminant processes.