In applying the linear systems theory to the mathematical simulation of chemical transport in topsoil, the impulse response function is used to describe the overall effects of hydrodynamic and kinetic mechanisms of the system. The general nature of the impulse response function of a soil transport system can be represented by a gamma distribution function. The multiple regression equations derived in this study can be used to correlate parameters of a gamma distribution function with basic soil and chemical properties. Techniques developed in this study are most suitable for assessing spatial variation of groundwater contamination potential in a large area.

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