ISCST3 Tech Guide

Gaussian Plume Air Dispersion Model

Table of Contents (TOC)

Please note that links to the main sections are available on the left-hand side and as tabs along the top.

Within each main section, links to subsections will be listed on the right-hand side if needed.

ISCST3 Model Evaluation References

Section 1:

1. Preface

Section 2:

2. Acknowledgements

Section 3:

3. Figures

Section 4:

4. Tables

Section 5:

5. Symbols

Section 6:

6. The ISC Short-term Dispersion Model Equations

6.1 Point Source Emissions

6.1.1 The Gaussian Equation

6.1.2 Downwind and Crosswind Distances

6.1.3 Wind Speed Profile

6.1.4 Plume Rise Formulas

6.1.5 The Dispersion Parameters

6.1.6 The Vertical Term

6.1.7 The Decay Term

6.2 Non-Point Source Emissions

6.2.1 General

6.2.2 The Short-Term Volume Source Model

6.2.3 The Short-Term Area Source Model

6.2.4 The Short-Term Open Pit Source Model

6.3 The ISC Short-Term Dry Deposition Model

6.3.1 General

6.3.2 Deposition Velocities

6.3.3 Point and Volume Source Emissions

6.3.4 Area and Open Pit Source Emissions

6.4 The ISC Short-Term Wet Deposition Model

6.5 ISC Complex Terrain Screening Algorithms

6.5.1 The Gaussian Sector Average Equation

6.5.2 Downwind, Crosswind and Radial Distances

6.5.3 Wind Speed Profile

6.5.4 Plume Rise Formulas

6.5.5 The Dispersion Parameters

6.5.6 The Vertical Term

6.5.7 The Decay Term

6.5.8 The Plume Attenuation Correction Factor

6.5.9 Wet Deposition in Complex Terrain

6.6 ISC Treatment of Intermediate Terrain

Section 7:

7. The ICS Long-term Dispersion Model Equations

7.1 Point Source Emissions

7.1.1 The Gaussian Sector Average Equation

7.1.2 Downwind and Crosswind Distances

7.1.3 Wind Speed Profile

7.1.4 Plume Rise Formulas

7.1.5 The Dispersion Parameters

7.1.6 The Vertical Term

7.1.7 The Decay Term

7.1.8 The Smoothing Function

7.2 Non-point Source Emissions

7.2.1 General

7.2.2 The Long-Term Volume Source Model

7.2.3 The Long-Term Area Source Model

7.2.4 The Long-Term Open Pit Source Model

7.3 The ISC Long-term Dry Deposition Model

7.3.1 General

7.3.2 Point and Volume Source Emissions

7.3.3 Area and Open Pit Source Emissions

Section 8:

8. References

Section 9:

9. Index