TABLE B‑9

        DESCRIPTION OF TERRAIN GRID PATHWAY KEYWORDS

 

TG Keywords

    Type

Keyword Description

STARTING

    M ‑ N

Identifies the start of TERRAIN GRID pathway inputs

INPUTFIL

    M ‑ N

Describes input terrain grid data file

LOCATION

    M ‑ N

Specifies the origin of the terrain grid

ELEVUNIT

    O - N

Defines input units for terrain grid elevations (defaults to meters)

FINISHED

    M ‑ N

Identifies the end of TERRAIN GRID pathway inputs

 

Note:The Terrain Grid (TG) pathway is optional.  The TG pathway is only used for calculating dry depletion in elevated or complex terrain.  If it is omitted, then the terrain profile is linearly interpolated along the plume path from source to receptor for dry depletion calculations.

                                                                                                    

                         TABLE B‑10

DESCRIPTION OF TERRAIN GRID PATHWAY KEYWORDS AND PARAMETERS

 

INPUTFIL

Tgfile

  where:

Tgfile

Specifies filename for the terrain grid data file

LOCATION

Xorig  Yorig  (Units)

  where:

Xorig

Yorig

Units

UTM X-coordinate of origin for the source and receptor locations

UTM Y-coordinate of origin for the source and receptor locations

Units for Xorig and Yorig (FEET, KM, or METERS - default

  is in METERS)

ELEVUNIT

METERS  or  FEET

  where:

METERS

 

FEET

Specifies input units for terrain grid elevations of

  meters

Specifies input units for terrain grid elevations of feet

    Note: This keyword applies to terrain grid elevations

          only.


 

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