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
Section 9: CALPUFF Table 9-68: OPTHILL Output File for Axis #2 of Sample Hill .*** Optimal SCALE and EXPO factors -- Axis #2 of example problem *** EVOL TIME LIMIT = 60. SECONDS SKIP = 10 NUMBER OF PARAMETERS FOR THIS STUDY : 4 PARAMETER START VALUE STEP CONTROL LOWER LIMIT UPPER LIMIT ---------- ----------- ----------- ---------- ----------- 1 RELIEF 0.3000E+03 0.0000E+00 0.3000E+03 0.3000E+03 2 AXMAX 0.1500E+04 0.0000E+00 0.1500E+04 0.1500E+04 3 EXPO 0.2000E+01 0.2000E+01 0.1000E+00 0.1000E+02 4 SCALE 0.1500E+04 0.7500E+03 0.1500E+02 0.1500E+06 CALCULATIONS STARTED RETURN VALUE: 2 NORMAL RETURN FUNCTION VALUE: 2.17504 PARAMETER VALUES: RELIEF = 300.00000 AXMAX = 1500.00000 EXPO = 1.23912 SCALE = 2895.90200 Distance Height Fitted Value 302.0 239.0 244.0 551.0 178.0 189.1 708.0 150.0 154.7 970.0 117.0 99.5 1311.0 56.0 33.5 9-330
Section 9: CALPUFF 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) (depends on choice of coordinates) thetah (deg) 69° 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 9-1), rather than just the portion of the function that is fit to the profile of the terrain. In Figure 9-1, 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. 9-331
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Section 9: CALPUFF<br />
<strong>Table</strong> 9-68:<br />
OPTHILL Output File for Axis #2 <strong>of</strong> Sample Hill<br />
.*** Optimal SCALE and EXPO factors -- Axis #2 <strong>of</strong> example problem ***<br />
EVOL TIME LIMIT = 60. SECONDS SKIP = 10<br />
NUMBER OF PARAMETERS FOR THIS STUDY : 4<br />
PARAMETER START VALUE STEP CONTROL LOWER LIMIT UPPER LIMIT<br />
---------- ----------- ----------- ---------- -----------<br />
1 RELIEF 0.3000E+03 0.0000E+00 0.3000E+03 0.3000E+03<br />
2 AXMAX 0.1500E+04 0.0000E+00 0.1500E+04 0.1500E+04<br />
3 EXPO 0.2000E+01 0.2000E+01 0.1000E+00 0.1000E+02<br />
4 SCALE 0.1500E+04 0.7500E+03 0.1500E+02 0.1500E+06<br />
CALCULATIONS STARTED<br />
RETURN VALUE: 2 NORMAL RETURN FUNCTION VALUE: 2.17504<br />
PARAMETER VALUES:<br />
RELIEF = 300.00000<br />
AXMAX = 1500.00000<br />
EXPO = 1.23912<br />
SCALE = 2895.90200<br />
Distance Height Fitted Value<br />
302.0 239.0 244.0<br />
551.0 178.0 189.1<br />
708.0 150.0 154.7<br />
970.0 117.0 99.5<br />
1311.0 56.0 33.5<br />
9-330
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