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         APPENDIX A. ALPHABETICAL KEYWORD REFERENCE

     This appendix provides an alphabetical listing of all of the keywords used by the ISC models.  Each keyword is identified as to the pathway for which it applies, the keyword type (either mandatory or optional, and either repeatable or non‑repeatable), and with a brief description of the function of the keyword.  For a more complete description of the keywords, including a list of associated parameters, refer to the Detailed Keyword Reference in Section 3 or the Functional Keyword/Parameter Reference in Appendix B.

Keyword

Path

Type

         Keyword Description

ANEMHGHT

ME

M ‑ N

Height of anemometer above stack base

AVERTIME

CO

M ‑ N

Averaging time(s) to process (up to NAVE short term plus PERIOD or ANNUAL averages)

AVEMIXHT

ME

M ‑ R

Average mixing height for each wind speed, stability category and season (Applies Only to Long Term)

AVEROUGH

ME

O - R

Roughness length (m) for each season (Applies Only to Long Term)

AVESPEED

ME

O ‑ N

Average (median) wind speed for each speed category in the STAR summary (Applies Only to Long Term)

AVETEMPS

ME

M ‑ R

Average ambient temperature for each stability category and season (Applies Only to Long Term)

BOUNDARY

RE

O ‑ R

Defines discrete polar receptor locations corresponding to minimum plant boundary distances for each 10 degree sector

BOUNDELV

RE

O ‑ R

Defines terrain elevations for discrete receptors specified with BOUNDARY keyword

BUILDHGT

SO

O ‑ R

Building height values for each wind sector

BUILDWID

SO

O ‑ R

Building width values for each wind sector

CONCUNIT

SO

O - N

Optional conversion factors for emission input units and concentration output units

DAYRANGE

ME

O ‑ R

Specifies days or ranges of days to process (default is to process all data read in), applies only to ISCST processing

DAYTABLE

OU

O ‑ N

Option to provide summaries for each averaging period for each day processed. (Applies to ISCST Only)

DCAYCOEF

CO

O ‑ N

Optional decay coefficient for exponential decay

 

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