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3.9.2.4 Maximum Value/Threshold File.

     The user may select an option for the ISCST model to generate a file or files of concentration (or deposition) values exceeding a user‑specified threshold.  The OU MAXIFILE keyword controls this option.  The user may select separate files for each averaging period and source group combination for which a list of threshold violations may be needed.  Each file includes several records with header information identifying the averaging period, source group and threshold value, and then a record for every occurrence where the result for that averaging period/source group equals or exceeds the threshold value.  Each of these records includes the averaging period, source group ID, date for the threshold violation (ending hour of the averaging period), the x, y, z and flagpole receptor height for the receptor location where the violation occurred, and the concentration or deposition value.

     The structure of the threshold violation file is described in more detail in Appendix F.  Each of the files selected by the user is opened explicitly by the model as an formatted file.  The filenames are provided on the input runstream image. The user may specify the file unit on the MAXIFILE card through the optional FUNIT parameter.  User‑specified units must be greater than or equal to 20, and are recommended to be less than or equal to 100.  If no file unit is specified, then the file unit is determined internally according to the following formula:

IMXUNT = 100 + IGRP*10 + IAVE

where IMXUNT is the Fortran unit number, IGRP is the source group number (the order in which the group is defined in the runstream file), and IAVE is the averaging period number (the order of the averaging period as specified on the CO AVERTIME card).  This formula will not cause any conflict with other file units used by the model for up to 9 source groups and up to 9 short term averaging periods.

201 - 202 - 203 - 204 - 205 - 206 - 207 - 208 - 209 - 210 - 211 - 212 - 213 - 214 - 215 - 216 - 217 - 218 - 219 - 220 - 221 - 222 - 223 - 224 - 225 - 226 - 227 - 228 - 229 - 230 - 231 - 232 - 233 - 234 - 235 - 236 - 237 - 238 - 239 - 240 - 241 - 242 - 243 - 244 - 245 - 246 - 247 - 248 - 249 - 250

 

 

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castellano: DIS CUS DES  RAD   english: DIS CUS DES RAD  

 

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