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The scavenging coefficients for gaseous emissions are specified by a single keyword, GAS-SCAV, which uses a secondary keyword, LIQ or ICE, to distinguish between liquid and frozen precipitation scavenging.  The syntax, type and order for this keyword are summarized below:

Syntax:

SO GAS-SCAV  Srcid (or Srcrng)  LIQ or ICE  Scavcoef

Type:

Optional, Repeatable

Order:

Must follow the LOCATION card for each source input

where the Srcid or Srcrng identify the source or sources for which the inputs apply, and where the Scavcoef parameter is the scavenging coefficient (s-mm/hr)-1 for either liquid precipitation (secondary keyword of LIQ) or for frozen precipitation (secondary keyword of ICE).

3.3.8 Specifying an Hourly Emission Rate File

     The source (SO) pathway includes an option for inputting hourly emission rates for the ISCST model, controlled by the HOUREMIS keyword.  ISCST allows for a single hourly emission file to be used with each model run.  The syntax, type and order for this keyword are summarized below:

Syntax:

SO HOUREMIS  Emifil  Srcid's (and/or Srcrng's) 

Type:

Optional, Repeatable

Order:

Must follow the LOCATION card for each source input

where the Emifil parameter specifies the filename (up to 40 characters) for the hourly emission file, and Srcid or Srcrng identify the source or sources for which hourly emission rates are included.  Source ranges, which are described in more detail in the description of the BUILDHGT keyword (Section 3.3.3), are input as two source IDs separated by a dash, e.g., STACK1‑STACK10.  The user may include more than one HOUREMIS card in a runstream file, if needed to specify additional sources, but there can be only one hourly emissions file, and therefore the filename must be the same on all HOUREMIS cards.

 

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

 

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