Portal de Eventos, Congreso Colombiano y Conferencia Internacional de Calidad del Aire y Salud Pública

Tamaño de la fuente: 
Update of the atmospheric emission inventory - year 2017 - in the city of Manizales, Colombia
Erika Marcela Trejos Zapata, Maria Camila Valencia, Carlos Mario González, Wendy Hernández, Mauricio Velasco, Beatriz Helena Aristizábal

Última modificación: 04/06/2019

Resumen


The atmospheric emission inventory for the city of Manizales, Colombia, was updated for the year 2017 considering main anthropogenic sources in the city. On-road mobile sources were evaluated including exhaust, evaporative and a first estimation of resuspended particulate matter. Furthermore, stationary sources point (industries) and area sources (fuel distribution stations) were included. Total annual fluxes of criteria pollutants (CO, NOx, SO2, PM10), non-methane volatile hydrocarbons (NMVOC), greenhouse gases (CO2, CH4, N2O), PM2.5 and black carbon (BC) were estimated.

A bottom-up approach was applied for the estimation of on-road mobile sources following the International Vehicle Emissions (IVE) methodology. Variables such as vehicular fleet, vehicular activity (VKT and start-ups), fleet technology distribution and start-up diurnal patterns were updated. In terms of resuspended particulate matter, two methodologies were applied (EPA method and Amato-Pachón estimation performed previously in Bogotá, Colombia) following a top-down approach. Regarding the estimation of emissions from stationary point sources followed a bottom-up approach using information of stack sampling measurements, emission factors available in the AP-42 database and relations in function of PM10. Finally, emissions from fuel service stations were estimated following a top-down approach and the emission factors methodology of the EPA.

All results were compared with the previous emission inventory estimated in the city (year 2014) and reports of other emission inventories in the country. Results obtained showed that vehicular sources were the main source of pollution in the city. Changes in vehicular emissions between 2017 and 2014 were dominated by changes in vehicular fleet (increment of 28% of vehicles) and changes in vehicle technology distribution, which was responsible of a reduction of total CO and NMVOC emissions. Resuspended particulate material (the new source included in the estimation) presented a low contribution with respect to total on-road mobile sources with 10% of the emissions. Stationary point sources had an increase of CO, NOx, PM, NMVOC and CO2 emissions (greater than 50%), being food and tile industries the processes with the higher contribution.

Results will be used in studies which focus on disaggregation of the emission inventory which is required for high-resolution air quality modeling in Manizales.