Overview of Receptor Model Principles

Abstract

The overview states the fundamental structure and assumptions of receptor models, identifies the usefulness and limitations of these models in their present form, and outlines the potential future applications of receptor models to contemporary pollution problems. A division is made between models, the mathematical equations which relate variables to each other, and measurements, which supply values to some of the model variables so that others may be calculated. Models and measurements dictate each others' requirements, and a logical evolution of receptor models to their present state of the art is followed to illustrate this. In the process of this evolution, the limitations of receptor models become evident. The major limitation is that several basic assumptions are not generally applicable, and this limitation can only be overcome by restricting the cases or by adding more complexity to the models. Future applications of receptor models are likely to be seen in the areas of standard attainment, visibility degradation, hazardous substances, and acid deposition.