Midwest Rail Study
| Autor: | Varun Yadav, Jeremy G Heiken, Jay R. Turner, Stephen N Feinberg |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Transportation Research Record: Journal of the Transportation Research Board. 2261:106-114 |
| ISSN: | 2169-4052 0361-1981 |
| DOI: | 10.3141/2261-12 |
| Popis: | A detailed inventory of emissions including fine particulate matter (PM2.5) was developed for the CSX Rougemere railyard in Dearborn, Michigan, for 2007 to 2008. Emissions were temporally allocated at monthly, day-of-week, and hourly levels and spatially allocated within the railyard footprint. Dispersion modeling was conducted with AERMOD to estimate railyard near-field impacts including concentration levels at the Dearborn compliance monitoring station located about 150 m from the railyard fenceline. Annual average impacts ranged from 0.3 to 0.5 μg/m3 in 2007 and 0.2 to 0.3 μg/m3 in 2008, depending on the spatial allocation of locomotive activities within the railyard. The reduction in railyard impacts was caused primarily by the reduction of particulate matter emissions that occurred after conventional switcher locomotives were replaced with locomotives with the new GenSet locomotive technology. The proximity of the railyard to the Dearborn monitor and the dominant role of switcher locomotive emissions motivated an examination of the spatial allocation of the switcher locomotives on modeled impacts. Monte Carlo simulations were performed to randomly place switcher locomotive activity on specific tracks within the railyard. This approach yielded high variability for modeled hourly impacts at the Dearborn monitor. However, the variability was relatively small for the modeled daily average impacts and even smaller for the modeled annual average impacts. |
| Databáze: | OpenAIRE |
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