Canarina Environmental Software

Canarina DISPER Software · air quality dispersion model · algorithms 3

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Canarina DISPER Software · air quality dispersion model

 

Symbol / Definition

Ly= Initial plume length for Schulman-Scire downwash sources with enhanced lateral plume spread (m)

Lb= Lesser of the building height and crosswind projected building width (m)

_= Alongwind length of open pit source (m)

P(x,y)= Profile adjustment factor (dimensionless)

p= Wind speed power law profile exponent (dimensionless)

QA= Area Source pollutant emission rate (g/s)

Qe= Effective emission rate for effective area source for an open pit source (g/s)

Qi= Adjusted emission rate for particle size category for open pit emissions (g/s)

Qs= Pollutant emission rate (g/s)

Qt= Total amount of pollutant emitted during time period t (g)

R= Precipitation rate (mm/hr)

Ro= Initial plume radius for Schulman-Scire downwash sources (m)

R(z,zd)= Atmospheric resistance to vertical transport (s/cm)

r= Radial distance range in a polar receptor network (m)

ra= Atmospheric resistance (s/cm)

rd= Deposition layer resistance (s/cm)

s= Stability parameter = FUNC {g {{¶ theta}/¶z } over {T_a}}

S= Smoothing term for smoothing across adjacent sectors in the Long Term model (dimensionless)

SCF= Splip correction factor (dimensionless)

Sc= Schmidt number = FUNC { upsilon /D_B }

(dimensionless)

St= Stokes number (dimensionless)

Ta= Ambient temperature (K)

Ts= Stack gas exit temperature (K)

uref= Wind speed measured at reference anemometer height (m/s)

us= Wind speed adjusted to release height (m/s)

u*= Surface friction velocity (m/s)

V= Vertical term of the Gaussian plume equation (dimensionless)

Vd= Vertical term with dry deposition of the Gaussian plume equation (dimensionless)

vd= Particle deposition velocity (cm/s)

vg= Gravitational settling velocity for particles (cm/s)

vs= Stack gas exit velocity (m/s)

X= X-coordinate in a Cartesian grid receptor network (m)

xo= Length of side of square area source (m)

Y= Y-coordinate in a Cartesian grid receptor network (m)

q= Direction in a polar receptor network (degrees)

x= Downwind distance from source to receptor (m)

xy= Lateral virtual point source distance (m)

xz= Vertical virtual point source distance (m)

xf= Downwind distance to final plume rise (m)

x*= Downwind distance at which turbulence dominates entrainment (m)

y= Crosswind distance from source to receptor (m)

 

 

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Canarina DISPER Software · air quality dispersion model

 

It is interesting for information systems, monitoring systems, air quality control, BMP, air pollution, surveillance, air quality monitoring, air quality information, air quality standards, air quality regulations, air quality planning, air quality surveys, air quality monitoring systems, air quality permits, air quality sensors and air quality services.

 

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