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1.1.6 The Vertical Term

     The Vertical Term (V), which is included in Equation (1‑1), accounts for the vertical distribution of the Gaussian plume.  It includes the effects of source elevation, receptor elevation, plume rise (Section 1.1.4), limited mixing in the vertical, and the gravitational settling and dry deposition of particulates.  In addition to the plume height, receptor height and mixing height, the computation of the Vertical Term requires the vertical dispersion parameter (σz) described in Section 1.1.5.

1.1.6.1 The Vertical Term Without Dry Deposition.

     In general, the effects on ambient concentrations of gravitational settling and dry deposition can be neglected for gaseous pollutants and small particulates (less than about 0.1 microns in diameter).  The Vertical Term without deposition effects is then given by:

where:

     he = hs + Δh

     H1 = zr - (2izi - he)

     H2 = zr + (2izi - he)

     H3 = zr - (2izi + he)

     H4 = zr + (2izi + he)

     zr = receptor height above ground (flagpole) (m)

     zi = mixing height (m)

 

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  APLICACIONES castellano: DIS CUS DES  RAD   english: DIS CUS DES RAD  

 

 português: DIS CUS DES RAD   italiano:   DIS CUS  DES RAD

 

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