english:

 

 

                                 

 

AVERTIME

Time1  Time2  Time3  Time4  MONTH  PERIOD              (ISCST and ISCEV only)

                                     or

                                   ANNUAL

  where:

TimeN

 

MONTH

 

PERIOD

 

ANNUAL

Nth optional averaging time (1, 2, 3, 4, 6, 8, 12,

  24‑hr; number of periods limited by NAVE parameter)

Option to calculate MONTHly averages (counts toward

  NAVE limit)

Option to calculate averages for the entire data

  PERIOD

Option to calculate ANNUAL averages for the entire data

               

                      TABLE B‑2 (CONT.)

   DESCRIPTION OF CONTROL PATHWAY KEYWORDS AND PARAMETER 

AVERTIME

JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC      (ISCLT model)

WINTER  SPRING  SUMMER  FALL  or  QUART1  QUART2 QUART3  QUART4

MONTH  SEASON  QUARTR  ANNUAL  PERIOD

  where:

JAN

FEB

DEC

WINTER

SPRING

SUMMER

FALL

QUART1

QUART2

QUART3

QUART4

MONTH

SEASON

QUARTR

ANNUAL

 

PERIOD

Option to calculate JANuary averages from STAR data

Option to calculate FEBruary averages from STAR data

Option to calculate DECember averages from STAR data

Option to calculate WINTER averages from STAR data

Option to calculate SPRING averages from STAR data

Option to calculate SUMMER averages from STAR data

Option to calculate FALL averages from STAR data

Option to calculate QUART1 averages from STAR data

Option to calculate QUART2 averages from STAR data

Option to calculate QUART3 averages from STAR data

Option to calculate QUART4 averages from STAR data

Option to calculate averages for all twelve MONTHs

Option to calculate averages for all four SEASONs

Option to calculate averages for all four QUARTeRs

Option to calculate annual values from an ANNUAL STAR

   summary

Option to calculate averages for the entire data

   PERIOD

POLLUTID

Pollut

  where:

Pollut

Identifies type of pollutant being modeled. Any name

  of up to eight characters may be used, e.g., SO2,

  NOX, CO, PM10, TSP or OTHER.  Selection of

  SO2 with the URBAN DFAULT options forces use of

  a half life of 4 hours for exponential decay.  Use

  of PM10, PM‑10 or OTHER allows for the use of the

  MULTYEAR option.

HALFLIFE

Haflif

  where:

Haflif

Half life used for exponential decay (s)

DCAYCOEF

Decay

  where:

Decay

Decay coefficient for exponential decay (s‑1) = 0.693/HAFLIF

TERRHGTS

FLAT  or  ELEV

  where:

FLAT

 

ELEV

Specifies that flat terrain will be assumed for all

  calculations (default)

Specifies that receptors may be located on elevated

  terrain (chopped off at release height)

     Note that if ELEVated receptors are allowed,

     then receptor heights must be input on the RE

     pathway, or they will be assumed to be 0.0.

ELEVUNIT

METERS  or  FEET

  where:

METERS

 

FEET

Specifies input units for terrain (receptor) elevations of

  meters

Specifies input units for terrain (receptor) elevations of feet

    Note: This keyword applies to receptor elevations

          only.

FLAGPOLE

(Flagdf)

  where:

Flagdf

Default value for height of (flagpole) receptors

  above local ground level, a default value of 0.0 m

  is used if this optional parameter is omitted

 

Note:The CO ELEVUNIT card is obsolescent with this version of the ISC models.  The new RE ELEVUNIT card should be used instead to specify elevation units for receptors.  If the CO ELEVUNIT card is present, it will be processed as it was in the previous version of the ISC models, but it cannot be used when an ELEVUNIT card is present on either the SO, RE or TG pathways.

 

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