BUOYANCY
INDUCED DISPERSION (BID) COMPONENT OF 
AND y z
For the CBL’s Direct & Indirect sources, Buoyancy Induced Dispersion (BID) is calculated following Weil
The direct source plume rise is calculated from eq. (116).
For the Penetrated Source, BID is calculated as follows:
The height of the penetrated source (hep) is calculated from eq. (119) in section 3.e.1).
For the Stable Source BID is calculated as follows:
The
stable plume rise (
hs ) is calculated from eq. (120).
6 The AMS/EPA Regulatory Model AERMOD
6.1
General Structure of AERMOD Including Terrain
6.2
AERMOD Concentration Predictions in the CBL
6.2.1
DIRECT SOURCE CONTRIBUTION TO CONCENTRATION
CALCULATIONS
IN THE CBL
6.2.2
INDIRECT SOURCE CONTRIBUTION TO CONCENTRATION
CALCULATIONS
IN THE CBL
6.2.3
PENETRATED SOURCE CONTRIBUTION TO CONCENTRATION
CALCULATIONS
IN THE CBL
6.3
Concentrations in the SBL Calculated by AERMOD
6.4
Estimation of Dispersion Coefficients
6.4.1
AMBIENT TURBULENCE FOR USE IN CALCULATING DISPERSION
6.4.2
BUOYANCY INDUCED DISPERSION (BID) COMPONENT OF _ AND _
y z
6.4.3
COMPONENT OF DISPERSION COEFFICIENTS DUE TO
DOWNWASH
6.5
Plume Rise Calculations in AERMOD
6.5.1
PLUME RISE IN THE CBL
6.5.2
PLUME RISE IN THE SBL
6.6
Source Characterization
6.7
Adjustments for the Urban Boundary Layer
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