https://doi.org/10.4224/23003516
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Pre-processing of area and mobile sources of the Pacific 93 emissions inventory
Dorkalam, Alfred
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C:\WP\DOC\ALRED\PAC93EPS.WPD; September 24, 1996
2.0 EIS2EPS Program
To extract the appropriate inormation from the EIS database files and to make the new data base files usable by EPS 2.0, additional software was required. As part of a contract with
Environment Canada, Levelton prepared such a program, named EIS2EPS. Levelton supplied the program to NRC, along with the output iles that they had created by running the program with the Pacific 93 EIS database files as input.
The EIS.2EPS program is written in dBASE IV. After consultation with Van Luong, it was decided to run the program using the database sotware Arago. Arago was installed on Alred's PC. Because the Arago sotware is not fully compatible with dBASE IV, some ormatting changes were required in the EIS2EPS source code in order to make EIS2EPS run successfully. The EIS2EPS program was run and the results were identical to the output files supplied by Levelton as part of the EIS2EPS package.
2.1 Emissions Processing and Creation of AMS and AFS Database Files
Figure 1 describes some of the iles required by EPS2.0 as well as the steps carried out in Pre Processing of the Pacific 93 inventory . EIS2EPS program creates our sets of database type files. The first and second type of iles are MS and FS database files. These iles contain the emission amounts or the domain. AMS iles have all the Area and Mobile sources while the AFS files contain the emissions or the point sources. This work was previously done in a set of queries designed in Paradox, by Dr. Robert McLaren3. For details into the structure of AlIS and FS iles please refer to EPS2.0 manual.
The third set of data base les that EIS2EPS creates are temporal code cross reference files, s well as weekday ( this packet contains the hour speciic inormation), and weekly and monthly temporal actors. As the inventory is day speciic (see background and Paciic 93 draft report4) the
weekly and monthly temporal packets are blank and only weekday (see EPS2.0 user manual)5
temporal breakdowns are provided.
C:\WP\DOC\ALED\PAC93EPS.WPD; September 24, 1996
The ourth set of data bse type files that EIS2EPS creates are gridding cross reference files, as well as surrogate factors iles. This is used by the GDEM module of EPS2.0 to spatially allocate emissions into each grid cell or the 22 x 26 domain.
2.2 Database to ASCII Conversion.
This was achieved by using the PC based software Paradox. Each EIS2EPS generated database type ile is opened inside Paradox, and using Paradox's utilities menu it is saved as an ASCII text file. This is necessary as EPS2. 0 requires its input files in ASCII text ormat with EP S's own peculiar spacing. EIS2EPS has a reporting acility to convert the files from database ormat to text ormat, however, since this software was not available to RC it was not
used and the above task was perormed with Paradox.
2.3 EPS2.0 Formatting.
The ASCII files are then reormatted to have the exact and peculiar spacing required by EPS2.0. This is achieved by performing a set of macros inside jot ( a Unix based text editor).
2.3.1 AMS les.
The ollowing changes were made to the AMS files, as created by running the EIS2EPS program:
Levelton's EIS2EPS program split the Area and Mobile records into seven AMS Batches. The split was done to insure no batch contains more than 15 grid surrogates. This was due to the act that EPS2.0, by deault, can only accept up to 15 grid surrogates. The AMS iles were combined, by attaching each batch to the end of the last one, to make one AMS ile per day.
The second change made to the AMS ile, is one of ormatting. All the Levelton Area and Mobile Source Classiication Codes ( SCC ) used are 5 digit. AMS iles are designed or 10 digit
C:\WP\D0C\ALRED\PAC93EPS.\VPD; September 24, 1996
and evaporative profile for the two major road categories. This will be done once the data for vehicle miles travelled is obtained rom Levelton.
Also, two additional MOBLE5A runs have to be conducted to obtain MOG/VOC ratio corrections or this region. (NMOG = non-methane organic compounds; VOC = volatile organic compounds. The MOBLE5A manual deines VOC as all hydrocarbons including formaldehyde and acetaldehyde but excluding methane and ethane; MOG is defined as VOC plus ethane.) The application of the MOGNOC ratio will be urther discussed in the next section. Hence, a total of 4 runs per day were done or the US portion of the inventory. The MOBLES runs are summarized in Table 2.
Table 2. MOBLES runs perormed
Region Average Speed Road Type Vehicle Speed
(miles/hour) Classiication Category
Lower Mainland (Canada) 7.5 2301 Speed 1
Lower Mainland (Canada) 21.1 2501 Speed 2
Lower Mainland (Canada) 42 2701 Speed 3
Lower Mainland (Canada) 52.8 2901 speed 4
Extended Region (Canada) 20.3 2102 City
Extended Region (Canada) 41.1 3302 Highway
Whatcom County (US) 20.3 1103 Urban
Whatcom County (US) 41.1 1303 Highway
1 These road classiication codes were rbitrarily selected to represent Canadian Motor vehicle emissions, and since
they are not a unction of speed they do not represent any particular codes as deined by EPS2.0.
2 These road classification codes are the sme as those used by Rob McLaren for the City and Highway.
3
These Road classifications were selected to represent the US Motor Vehicles emissions and do not represent any codes as defined by EPS2.0.
