TITLE | The title of the current problem to be run with PGPLUME. |
At most 50 alphanumeric characters. | |
Optional, no default. |
DXPLUME | Horizontal downwind distance of transition location (m). |
0 <= DXPLUME <= 10^{4} (10 km). | |
Mandatory. | |
Actual source is assumed to be at 0 m downwind. | |
ZPLUME | Plume centroid height at transition location (m) |
0 <= ZPLUME <= 500. | |
Mandatory. | |
ZPLUME can be less than DPLUME/2 for a touch-down or slumped plume. | |
DPLUME | Plume effective diameter at transition location (m) |
0.1 <= DPLUME <= 500. | |
Mandatory. | |
Valid for airborne, touch-down or slumped plumes. | |
PHIPLUME | Plume inclination (relative to horizontal) at transition location (°) |
-10 <= PHIPLUME <= 10. | |
Mandatory. | |
PHIPLUME should, by definition of a 'passive' plume, be small. |
CPGAS | Specific heat at constant pressure of the dry gas (J/(mole K)). |
5 <=CPGAS<= 300. | |
Mandatory. | |
MWGAS | Molar mass of dry gas (kg/kmole). |
2 <= MWGAS<= 200. | |
Mandatory. | |
WATGAS | Mole fraction of water in released gas at release point (-). |
0 <= WATGAS <= 1 | |
Optional, default is 0. | |
GASFRAC | Mole fraction of dry component in released gas at release point (-). |
0 <=GASFRAC<= 1 | |
Optional, default is 1. |
UREL | Plume excess velocity at transition point (m/s). |
-2 <=UREL <= 2 | |
Mandatory. | |
Excess velocity is difference between the ambient wind-speed and the plume speed, both at plume centroid height. Must necessarily be small for a passive plume. | |
RREL | Plume excess density at transition point (kg/m^{3}). |
-1 <= RREL <= 1 | |
Mandatory. | |
Excess density is difference between the ambient density and the plume density, both at plume centroid height. Must necessarily be small for a passive plume. | |
CMASS | Concentration of released plume gas at transition point (kg/m^{3}). |
10^{-15}<= CMASS <= 1 | |
Mandatory. | |
DURATION | Release duration (s). |
-10^{6} <= DURATION <= 10^{}6 | |
Optional, default is steady-state release (DURATION < 0). | |
Negative for steady-state releases, positive for finite-duration, constant releases. Using a positive value invokes finite-duration correction in PGPLUME. |
DENSITY | Ambient density at centroid height (kg/m^{3}). |
0.5 < DENSITY <= 2.0. | |
Mandatory. | |
UATM | Ambient wind velocity at centroid height (m/s). |
1.0 < UATM <= 20. | |
Mandatory. | |
AIRTEMP | Ambient air temperature at centroid height (C). |
-50 <= AIRTEMP <= 50. | |
Mandatory. | |
AIRPRESS | Ambient air pressure (atm). |
0.7 <=AIRPRESS<= 1.1. | |
Optional, default is 1.0 atm. | |
RHPERC | Relative air humidity at centroid height (%). |
0.0 <= RHPERC <= 100. | |
Mandatory. |
ZR | Land surface roughness (m). |
10^{-5 } <=ZR <= 1. | |
Mandatory. | |
PQSTAB | Pasquill/Gifford stability class. |
PQSTAB = A, B, C, D, E or F (character). | |
Mandatory. | |
AVTIMC | Concentration measurement averaging time (s). |
18.75 <= AVTIMC <= 3600. | |
Mandatory. | |
'Instantaneous' limit is 18.75 s. | |
Note: If the PROFILE program will be using results of a PGPLUME run, then AVTIMC must be 18.75 s or less in the PGPLUME calculations. In other words, PROFILE expects PGPLUME to have calculated results for an 'instantaneous' plume. |
XFIRST | First output distance (m). |
0 <=XFIRST <= 10^{4} (10 km). | |
Mandatory. | |
XFIRST must exceed the downwind position of the transition point. | |
STEP | Arithmetic progression step-size (m). |
0 <= STEP <= 5 x 10^{4} (50 km). | |
Mandatory. | |
Output is at distance XFIRST and then at (arithmetic) intervals of STEP , until NSTEP steps have been taken or until XLAST has been reached or if gas concentration drops below VFLAST. | |
NSTEP | Maximum number of arithmetic steps to be taken (-). |
0 <= NSTEP <= 500. | |
Mandatory. | |
See description STEP. XLAST will never be exceeded | |
FACTOR | Geometric progression scale factor (-). |
1 < FACTOR <= 100. | |
Mandatory. | |
Output is generated at distances (XFIRST+ ISTEP x STEP) x FACTOR, where ISTEP goes from 1 to NSTEP. After this the distances are multiplied per output step by FACTOR until XLAST has been reached. FACTOR must be greater than 1.0 to be effective. | |
XLAST | Last output distance (m). |
0 <= XLAST <= 5 x 10^{4}(50 km). | |
Mandatory. | |
XLAST must exceed XFIRST. | |
VFLAST | Last required mole fraction gas (ppm). |
10^{-5} <=VFLAST<= 5 x 10^{}4. | |
Mandatory. | |
PGPLUME will halt if concentration of gas falls below VFLAST. |