Central Campus Air Quality Model (CCAQM) Instructions
Line
Sources
Line source
models are a way to represent a steady stream of vehicles traveling
along a road. The line source model used in this tutorial is a
Gaussian distribution, which is a statistical representation of the
dispersion of emissions from the road in a given space.
Model
Inputs
The
Gaussian distribution of a line source is given by the following
equation:
Where:

C(x) =
concentration at ground level at point (x,y) in units g/m^{3}

q =
emission rate per distance, g/mile

u = wind
speed, m/s

σ_{z}
= vertical dispersion coefficient, m
