title: Vehicular pollution modeling using the operational street pollution model (OSPM) for Chembur, Mumbai (India).
abstract: Megacities in India such as Mumbai and Delhi are among the most polluted places in the world. In the present study, the widely used operational street pollution model (OSPM) is applied for assessing pollutant loads in the street canyons of Chembur, a suburban area just outside Mumbai city. Chembur is both industrialized and highly congested with vehicles. There are six major street canyons in this area, for which modeling has been carried out for NOx and particulate matter (PM). The vehicle emission factors for Indian cities have been developed by Automotive Research Association of India (ARAI) for PM, not specifically for PM10 or PM2.5. The model has been applied for 4 days of winter season and for the whole year to see the difference of effect of meteorology. The urban background concentrations have been obtained from an air quality monitoring station. Results have been compared with measured concentrations from the routine monitoring performed in Mumbai. NOx emissions originate mainly from vehicles which are ground-level sources and are emitting close to where people live. Therefore, those emissions are highly relevant. The modeled NOx concentration compared satisfactorily with observed data. However, this was not the case for PM, most likely because the emission inventory did not contain emission terms due to resuspended particulate matter.
authors.affiliation: Centre for Environmental Science and Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India. awkash.narayan@gmail.com.
authors.forename: Awkash
authors.initials: A
authors.lastname: Kumar
authors.affiliation: Department of Environmental Science, Aarhus University, Frederiksborgvej 399, P.O. Box 358, 4000, Roskilde, Denmark.
authors.forename: Matthias
authors.initials: M
authors.lastname: Ketzel
authors.affiliation: Centre for Environmental Science and Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India.
authors.forename: Rashmi S
authors.initials: RS
authors.lastname: Patil
authors.affiliation: Centre for Environmental Science and Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India.
authors.forename: Anil Kumar
authors.initials: AK
authors.lastname: Dikshit
authors.affiliation: Department of Environmental Science, Aarhus University, Frederiksborgvej 399, P.O. Box 358, 4000, Roskilde, Denmark.|Department for Environmental, Social and Spatial Change, Roskilde University, Universitetsvej1, 4000, Roskilde, Denmark.
authors.forename: Ole
authors.initials: O
authors.lastname: Hertel
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000032:analysis*; D002947:Cities; D004784:Environmental Monitoring / Q000379:methods*; D006801:Humans; D007194:India; D008962:Models, Theoretical; D052638:Particulate Matter / Q000032:analysis*; D012621:Seasons; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter; D001335:Vehicle Emissions
keywords: NOx; Operational street pollution model; PM; Traffic pollution modeling; Urban air quality