ISCST3 Tech Guide

Gaussian Plume Air Dispersion Model

7.2.2 The Long-Term Volume Source Model

The ISC Long Term Model uses a virtual point source algorithm to model the effects of volume sources. Therefore, Equation (2-1) is also used to calculate seasonal average ground-level concentrations for volume source emissions. The user must assign initial lateral (Fyo) and vertical (Fzo) dimensions and the effective emission height he. A discussion of the application of the volume source model is given in Section 1.2.2.