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NARSTO Workshop on Innovative Methods for Emission Inventory Development and Evaluation University of Texas, Austin October 14-17, 2003 |
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Developing the Mexico National Emissions Inventory
Paula G. Fields and Martinus E. Wolf
ERG, Inc., Sacramento, California 95826
Gildardo Acosta-Ruiz
Acosta y Asociados, Douglas, Arizona 85608
The first comprehensive national emissions inventory for the country of Mexico is currently under development. The Mexico National Emissions Inventory (NEI) project, which began in 2001, is being conducted in three phases over three years. Phase I covered program planning and organization, and development of the Inventory Preparation Plan. Phase II included the development of the inventory for the six northern Mexican states of Baja California, Sonora, Chihuahua, Coahuila, Nuevo León, and Tamaulipas. On-going work (to be completed in September 2004) will result in an emissions inventory for the remaining Mexican states. The Mexico NEI includes emissions estimates for seven pollutants (VOC, CO, NOx, SO2, PM10, PM2.5, and NH3) generated by point, area, natural, and on- and off-road mobile sources.
This presentation will present the results of Phases I and II, including the methods used, data obtained, and uncertainties assessed for the northern states inventory. Emphasis will be placed on how data were collected for point sources, including state-by-state efforts to identify existing data and compile these data into one comprehensive database for all point sources in Mexico. Area source emissions will be described in terms of their data collection efforts, and results of the national fuels balance. Emission factor models developed especially for Mexico (e.g., NONROAD-Mexico) will be described. (Details on development of the MOBILE6-Mexico model, and the innovative approach to estimating reentrainment emissions from paved and unpaved roads in Mexico will be discussed in companion presentations by Kishan and Wolf) A workshop to present the results of the draft northern states inventory is scheduled for July 2003; as appropriate, the outcome of this workshop, including any significant changes in methods and data that are cited by workshop participants will be discussed in this presentation.