CALPUFF and Postprocessors

This process is simplified somewhat if a batch file is used to manage the filenames. One such batch file
for DOS (RUNOPT.BAT) is included with the testcase. It requires three filenames as arguments:
RUNOPT file1 file2 file3
where
file1 OPTHILL.EXE executable program file
file2 user.inp input file
file3 user.out output file
The batch file copies file2 to OPTHILL.INP, runs OPTHILL.EXE which creates OPTHILL.LST, then
renames OPTHILL.LST to the name supplied as file3. For the example above, axis #1 would be
processed by typing the command:
RUNOPT OPTHILL.EXE AXIS1.INP AXIS1.LST
With these results, hill information that is independent of the choice of coordinate system and the
modeling grid for the wind model can be specified:
xc,yc (m)
thetah (deg)
(depends on choice of coordinates)
69E
zgrid (m)
(depends on grid for wind model)
relief (m) 300.
expo (1) 1.91
expo (2) 1.24
scale (1) (m) 1523.
scale (2) (m) 2896.
axmax (1) (m) 2000.
axmax (2) (m) 1500.
Note that scale(2) is almost twice scale(1), even though axis 1 corresponds to the longer axis of the hill.
This can occur because the "scale" parameter is a property of the entire inverse-polynomial function
(Equation F-1), rather than just the portion of the function that is fit to the profile of the terrain. In Figure
F-1, the shape of the terrain might best conform to the upper 10% of the polynomial function, in which
case the "scale" parameter would exceed "axmax." In this example application of the OPTHILL program,
we see that axmax(2) is substantially less than axmax(1), whereas scale(2) exceeds scale(1), indicating
that a comparatively smaller portion of the polynomial function represents the terrain profile along the
minor axis.
MAR 2006 – CALPUFF
F-283