Table of Contents - The Atmospheric Studies Group at TRC
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Table of Contents - The Atmospheric Studies Group at TRC

Table of Contents - The Atmospheric Studies Group at TRC Table of Contents - The Atmospheric Studies Group at TRC

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Section 9: CALPUFF Table 9-3 (Continued) CALPUFF Control File Inputs - Input Group 13 Point Source Parameters Variable Type Description Default Value (Input Group 13a - General Data) NPT1 integer Number of point sources with constant stack parameters or variable emission rate scale factors - IPTU integer Units choice for emission rates from point sources 1 = g/s 2 = kg/hr 3 = lb/hr 4 = tons/yr 5 = Odor Units * m 3 /s (vol. flux of compound) 6 = Odor Units * m 3 /min 7 = metric tons/yr 8 = Bq/s (Bq = becquerel = disintegration/s) 9 = GBq/yr 1 NSPT1 integer Number of source-species with variable emission rate scaling factors provided in 13d 0 NPT2 integer Number of point sources with arbitrarily-varying emission - parameters (If NPT2 > 0, the point source emissions file PTEMARB.DAT must be provided) (Input Group 13b - Point Source Data for Sources with Constant Stack Parameters or Variable Emission Rate Scale Factors) - SRCNAM character*12 Source name, used to coordinate inputs in Subgroups b,c,d - XKM real X coordinate (km) of the stack on the meteorological grid - YKM real Y coordinate (km) of the stack on the meteorological grid - HSTAK real Stack height (m) - SELEV real Stack base elevation (m) above mean sea level - DIAM real Stack diameter (m) - EXITW real Stack gas exit velocity (m/s) - EXITT real Stack gas exit temperature (deg. K) - 9-92

Section 9: CALPUFF BDOWN real Building downwash flag 0. = building downwash not modeled, 1. = building downwash modeled EMS real array Emission rate of each modeled species Note: "NSPEC" values must be entered - - Table 9-3 (Continued) CALPUFF Control File Inputs - Input Group 13 Point Source Parameters Variable Type Description Default Value (Optional Variables for Input Group 13b) SIGMAYI real Initial sigma-y (m) associated with the release from this source SIGMAZI real Initial sigma-z (m) associated with the release from this source FMFAC real is a vertical momentum flux factor (0. or 1.0) used to represent the effect of rain-caps or other physical configurations that reduce momentum rise associated with the actual exit velocity. FMFAC=1 is full momentum (no obstruction). 0.0 - 0.0 1.0 ZPLTFM real is the platform height (m) for sources influenced by an 0.0 isolated structure that has a significant open area between the surface and the bulk of the structure The variables in Input Group 13b are entered for each of the "NPT1" point sources. The data for each source is treated as a separate input subgroup, and therefore, must end with an input group terminator (i.e., !END!). Note that the source number is an optional user comment which is outside of the delimiter containing the required source data. The data for each source must follow an opening delimiter and "X=". The data for each source is followed by a closing delimiter and an input group terminator. The first two optional variables may be provided for point sources that have a characteristic distribution much like volume sources. The values are entered in order between delimiters, following “SIGYZI=”. The third optional variable is typically used for sources with rain-hats that eliminate the initial vertical momentum of the release. These records must be placed before the input group terminates (i.e., !END!) for the point source. 9-93

Section 9: CALPUFF<br />

<strong>Table</strong> 9-3 (Continued)<br />

CALPUFF Control File Inputs - Input <strong>Group</strong> 13<br />

Point Source Parameters<br />

Variable Type Description Default Value<br />

(Input <strong>Group</strong> 13a - General D<strong>at</strong>a)<br />

NPT1<br />

integer<br />

Number <strong>of</strong> point sources with constant stack parameters or<br />

variable emission r<strong>at</strong>e scale factors<br />

-<br />

IPTU<br />

integer<br />

Units choice for emission r<strong>at</strong>es from point sources<br />

1 = g/s<br />

2 = kg/hr<br />

3 = lb/hr<br />

4 = tons/yr<br />

5 = Odor Units * m 3 /s (vol. flux <strong>of</strong> compound)<br />

6 = Odor Units * m 3 /min<br />

7 = metric tons/yr<br />

8 = Bq/s (Bq = becquerel = disintegr<strong>at</strong>ion/s)<br />

9 = GBq/yr<br />

1<br />

NSPT1<br />

integer<br />

Number <strong>of</strong> source-species with variable emission r<strong>at</strong>e<br />

scaling factors provided in 13d<br />

0<br />

NPT2 integer Number <strong>of</strong> point sources with arbitrarily-varying emission<br />

-<br />

parameters (If NPT2 > 0, the point source emissions file<br />

PTEMARB.DAT must be provided)<br />

(Input <strong>Group</strong> 13b - Point Source D<strong>at</strong>a for Sources with Constant Stack Parameters or<br />

Variable Emission R<strong>at</strong>e Scale Factors)<br />

-<br />

SRCNAM<br />

character*12<br />

Source name, used to coordin<strong>at</strong>e inputs in Subgroups b,c,d<br />

-<br />

XKM<br />

real<br />

X coordin<strong>at</strong>e (km) <strong>of</strong> the stack on the meteorological grid<br />

-<br />

YKM real Y coordin<strong>at</strong>e (km) <strong>of</strong> the stack on the meteorological grid -<br />

HSTAK real Stack height (m) -<br />

SELEV real Stack base elev<strong>at</strong>ion (m) above mean sea level -<br />

DIAM real Stack diameter (m) -<br />

EXITW real Stack gas exit velocity (m/s) -<br />

EXITT real Stack gas exit temper<strong>at</strong>ure (deg. K) -<br />

9-92

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