INDIRECT SOURCE CONTRIBUTION TO CONCENTRATION CALCULATIONS IN THE CBL
The concentration contribution from the horizontal state of the indirect source is calculated as follow:
The
height of the indirect source 
rj is
calculated from eq. (75). The total concentration for the terrain responding state
has the form of eq.(74) with zr replaced by zp
.
The
dispersion coefficients (
y
,z1 & z2
) resulting from the total
turbulence (ambient, buoyancy y z1
z2 induced & building
induced) are calculated using eqs. (85) and (98) thru (103).
The height of the indirect plume is given by the following
expression:
h
is calculated from eq. (118).
The aj’s in eq. (75) are calculated from eq. (72).
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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