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DISPER software: Air pollution map produced by three different stacks (XZ-plane)
Canarina software for analysis of air pollution in environment: air pollution control, environmental engineering, environmental consultancy service, environment simulation, environmental modeling and environmental impact assessment. Air dispersion software: ISC 129 instabilities
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DISPER: Air pollution dispersion ˇ DISPER - Solutions - Data - Algorithms - Emissions - Graphs - ISC3 (VOL. 2)
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2.1.5.2 Lateral and Vertical Virtual Distances.
See
Section 1.1.5.2 for a discussion of the procedures used to calculate vertical
virtual distances. The lateral virtual distance is given by:
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where ro is the effective source radius in meters. For volume sources (see Section 2.2.2), the
program sets ro equal to 2.15σyo, where σyo
is the initial lateral dimension. For area sources (see Section 2.2.3), the
program sets ro equal to xo/
where xo is the length
of the side of the area source. For
plumes affected by building wakes (see Section
1.1.5.2), the program sets ro equal to 2.15 σy´
where σy´ is given for squat buildings by Equation (1‑41),
(1‑42), or (1‑43) for downwind distances between 3 and 10 building
heights and for tall buildings by Equation (1‑44) for downwind distances
between 3 and 10 building widths. At
downwind distances greater than 10 building heights for Equation (1‑41),
(1‑42), or (1‑43), σy´ is held constant at the
value of σy´ calculated at a downwind distance of 10 building
heights. Similarly, at downwind
distances greater than 10 building widths for Equation (1‑44), σy´
is held constant at the value of σy´ calculated at a downwind
distance of 10 building widths.
