where: x = along-wind coordinate measured in wind direction from the source
y = cross-wind coordinate direction
z = vertical coordinate measured from the ground
C(x,y,z) = mean concentration of diffusing substance at a point (x,y,z) [kg/m3
]
Ky, Kz = eddy diffusivities in the direction of the y- and z- axes [m2
/s]
U = mean wind velocity along the x-axis [m/s]
S = source/sink term [kg/m3
-s]