ABSTRACT
This chapter presents a particular form of solute-transport equation for the purpose of introducing the concept of mathematically-based predictions. Prediction enables the approximate chemical concentrations of contaminants to be determined at critical points of interest within the aquifer, such as drainage ditches, or the property boundary downgradient of a waste facility. Prediction is based on variables such as: the properties of aquifer materials; and the nature and input concentrations of contaminants. Mathematical equations used for solute transport prediction are referred to as chemical mass transport equations. The best way to introduce the undergraduate to the concept of solute transport and attenuation is to consider a simple one-dimensional equation that enables values of attenuated concentration to be estimated at points downgradient of the source of contamination merely by using a scientific calculator. A two-dimensional analysis enables solute-concentration contours to be drawn in plan view, whereas a one-dimensional analysis provides attenuated values only down the x-axis.
