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 8: CALMET Model Files If the wet removal algorithm of the CALPUFF or MESOPUFF II models is to be applied, CALMET must produce gridded fields of hourly precipitation rates from observations. The PXTRACT and PMERGE preprocessing programs process and reformat the NWS precipitation data in TD-3240 format into a formatted or unformatted file called PRECIP.DAT. The output file of PMERGE is directly compatible with the input requirements of CALMET. The user needs to set the precipitation file format variable, IFORMP, in the CALMET control file to one when using PMERGE unformatted output. Otherwise, set IFORMP to two for a formatted file either prepared by the user or generated by PMERGE. This option is provided to allow the user an easy way to manually enter precipitation data for short CALMET runs. A sample free-formatted PRECIP.DAT file is shown in Table 8-15. A description of each variable in the formatted surface data file is contained in Table 8-16. The first line of the file identifies the file and its format to CALMET. The second line provides the number of comment lines (character strings of up to 80 characters in length) to follow that are read but are not interpreted by the model. One of these may typically contain a title to identify the data set. The next line after all comment records identifies the map projection for any locations provided in the file. Presently, the projection is NONE as no locations are provided. The next record identifies the time zone of the data in the file, which is denoted as the time to add to UTC (e.g., the Eastern Standard Time zone in the USA is UTC-0500). The next line identifies the beginning and ending dates and times of data in the file, the reference time zone for these, and the number of stations. Finally, one record per station follows with the station ID for each. One data record must follow for each hour. Each data record contains the date and time and the precipitation rate (mm/hr) for each station. 8-81

Section 8: CALMET Model Files Table 8-15: Sample Precipitation Data File (PRECIP.DAT) PRECIP.DAT 2.1 Hour Start and End Times with Seconds 1 Produced by PMERGE Version: 5.60 Level: 050921 NONE UTC-0700 1990 1 0 0 1990 1 11 3600 16 170273 176905 177325 178641 270741 270998 272842 273182 274732 274808 275639 275780 276234 276818 278885 437054 1990 1 0 0 1990 1 0 3600 0.000 0.000 0.000 0.000 0.000 0.000 9999.000 0.000 0.000 0.000 0.254 0.000 0.000 0.000 0.000 0.000 1990 1 1 0 1990 1 1 3600 0.000 0.000 0.000 0.000 0.000 0.000 9999.000 0.000 0.000 0.000 0.762 0.000 0.000 2.540 0.000 0.000 1990 1 2 0 1990 1 2 3600 0.000 0.000 0.000 0.000 0.000 0.000 9999.000 0.000 0.000 0.000 0.762 0.000 0.000 0.000 0.000 0.000 1990 1 3 0 1990 1 3 3600 0.000 0.000 0.000 0.000 0.000 0.000 9999.000 0.000 0.000 2.540 1.016 0.000 0.000 0.000 0.000 0.000 1990 1 4 0 1990 1 4 3600 0.000 0.000 0.000 0.000 0.000 0.000 9999.000 0.000 0.000 0.000 0.762 2.540 2.540 2.540 0.000 0.000 1990 1 5 0 1990 1 5 3600 0.000 0.254 0.000 0.000 0.000 2.540 9999.000 0.000 2.540 0.000 1.016 0.000 0.000 0.000 0.000 0.000 1990 1 6 0 1990 1 6 3600 0.000 1.016 0.000 0.000 0.000 0.000 9999.000 0.000 0.000 0.000 1.524 0.000 0.000 0.000 0.000 0.000 1990 1 7 0 1990 1 7 3600 2.540 0.000 0.000 0.000 2.540 0.000 0.000 2.540 0.000 0.000 2.032 0.000 0.000 0.000 0.000 0.000 1990 1 8 0 1990 1 8 3600 0.000 0.000 2.540 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2.540 0.000 0.000 0.000 0.000 0.000 1990 1 9 0 1990 1 9 3600 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2.794 0.000 0.000 0.000 0.000 0.000 1990 1 10 0 1990 1 10 3600 0.000 0.000 0.000 2.540 0.000 0.000 0.000 0.000 0.000 0.000 2.540 0.000 0.000 0.000 0.000 0.000 1990 1 11 0 1990 1 11 3600 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2.286 0.000 0.000 0.000 0.000 0.000 8-82

Section 8: CALMET Model Files<br />

<strong>Table</strong> 8-15:<br />

Sample Precipit<strong>at</strong>ion D<strong>at</strong>a File (PRECIP.DAT)<br />

PRECIP.DAT 2.1 Hour Start and End Times with Seconds<br />

1<br />

Produced by PMERGE Version: 5.60 Level: 050921<br />

NONE<br />

UTC-0700<br />

1990 1 0 0 1990 1 11 3600 16<br />

170273<br />

176905<br />

177325<br />

178641<br />

270741<br />

270998<br />

272842<br />

273182<br />

274732<br />

274808<br />

275639<br />

275780<br />

276234<br />

276818<br />

278885<br />

437054<br />

1990 1 0 0 1990 1 0 3600<br />

0.000 0.000 0.000 0.000 0.000 0.000 9999.000 0.000 0.000<br />

0.000<br />

0.254 0.000 0.000 0.000 0.000 0.000<br />

1990 1 1 0 1990 1 1 3600<br />

0.000 0.000 0.000 0.000 0.000 0.000 9999.000 0.000 0.000<br />

0.000<br />

0.762 0.000 0.000 2.540 0.000 0.000<br />

1990 1 2 0 1990 1 2 3600<br />

0.000 0.000 0.000 0.000 0.000 0.000 9999.000 0.000 0.000<br />

0.000<br />

0.762 0.000 0.000 0.000 0.000 0.000<br />

1990 1 3 0 1990 1 3 3600<br />

0.000 0.000 0.000 0.000 0.000 0.000 9999.000 0.000 0.000<br />

2.540<br />

1.016 0.000 0.000 0.000 0.000 0.000<br />

1990 1 4 0 1990 1 4 3600<br />

0.000 0.000 0.000 0.000 0.000 0.000 9999.000 0.000 0.000<br />

0.000<br />

0.762 2.540 2.540 2.540 0.000 0.000<br />

1990 1 5 0 1990 1 5 3600<br />

0.000 0.254 0.000 0.000 0.000 2.540 9999.000 0.000 2.540<br />

0.000<br />

1.016 0.000 0.000 0.000 0.000 0.000<br />

1990 1 6 0 1990 1 6 3600<br />

0.000 1.016 0.000 0.000 0.000 0.000 9999.000 0.000 0.000<br />

0.000<br />

1.524 0.000 0.000 0.000 0.000 0.000<br />

1990 1 7 0 1990 1 7 3600<br />

2.540 0.000 0.000 0.000 2.540 0.000 0.000 2.540 0.000<br />

0.000<br />

2.032 0.000 0.000 0.000 0.000 0.000<br />

1990 1 8 0 1990 1 8 3600<br />

0.000 0.000 2.540 0.000 0.000 0.000 0.000 0.000 0.000<br />

0.000<br />

2.540 0.000 0.000 0.000 0.000 0.000<br />

1990 1 9 0 1990 1 9 3600<br />

0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000<br />

0.000<br />

2.794 0.000 0.000 0.000 0.000 0.000<br />

1990 1 10 0 1990 1 10 3600<br />

0.000 0.000 0.000 2.540 0.000 0.000 0.000 0.000 0.000<br />

0.000<br />

2.540 0.000 0.000 0.000 0.000 0.000<br />

1990 1 11 0 1990 1 11 3600<br />

0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000<br />

0.000<br />

2.286 0.000 0.000 0.000 0.000 0.000<br />

8-82

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