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Table of Contents - The Atmospheric Studies Group at TRC

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Section 9: CALPUFF<br />

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

CALPUFF Control File Inputs - Input <strong>Group</strong> 7<br />

Dry Deposition Parameters - Gases<br />

Input <strong>Group</strong> 7 consists <strong>of</strong> a table containing the following five parameters which are required by the<br />

resistance deposition model for computing deposition velocities for gases:<br />

Pollutant diffusivity (cm 2 /s)<br />

Aqueous phase dissoci<strong>at</strong>ion constant, *<br />

Pollutant reactivity<br />

Mesophyll resistance, r m (s/cm)<br />

Henry's Law coefficient, H (dimensionless)<br />

<strong>The</strong>se parameters must be specified for each pollutant with a dry deposition flag <strong>of</strong> "1" in the species list<br />

(Input <strong>Group</strong> 3) indic<strong>at</strong>ing the use <strong>of</strong> the resistance model for a gas.<br />

<strong>The</strong> form<strong>at</strong> <strong>of</strong> the input table is shown below:<br />

--------------------------------------------------------------------------------------------------------------<br />

INPUT GROUP: 7 -- Chemical parameters for dry deposition <strong>of</strong> gases<br />

--------------------------<br />

SPECIES DIFFUSIVITY ALPHA STAR REACTIVITY MESOPHYLL RESISTANCE HENRY'S LAW COEFFICIENT<br />

NAME (cm**2/s) (s/cm) (dimensionless)<br />

------- ----------- ---------- ---------- -------------------- -----------------------<br />

! SO2 = 0.1509 , 1.00E3 , 8.0 , 0.0 , 4.e-2 !<br />

! NOX = 0.1656 , 1.00 , 8.0 , 5.0 , 3.5 !<br />

! HNO3 = 0.1628 , 1.00 , 18.0 , 0.0 , 8.e-8 !<br />

!END!<br />

9-79

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