Symbol Definition

A Linear decay term for vertical dispersion in

Schulman-Scire downwash (dimensionless)

Ae Effective area for open pit emissions (dimensionless)

D Exponential decay term for Gaussian plume equation

(dimensionless)

DB Brownian diffusivity (cm/s)

Dr Relative pit depth (dimensionless)

de Effective pit depth (m)

dp Particle diameter for particulate emissions (μm)

ds Stack inside diameter (m)

Fb Buoyancy flux parameter (m4/s3)

Fd Dry deposition flux (g/m2)

Fm Momentum flux parameter (m4/s2)

FQ Plume depletion factor for dry deposition

(dimensionless)

FT Terrain adjustment factor (dimensionless)

Fw Wet deposition flux (g/m2)

f Frequency of occurrence of a wind speed and stability

category combination (dimensionless)

g Acceleration due to gravity (9.80616 m/s2)

hb Building height (m)

he Plume (or effective stack) height (m)

hs Physical stack height (m)

hter Height of terrain above stack base (m)

hs´ Release height modified for stack-tip downwash (m)

pix

 

 

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