A study of the effects of vehicle emissions on the atmosphere of Sultan Qaboos University in Oman
Introduction
CALPUFF is considered one of the most powerful environmental modeling programs. It has been used by many researchers to investigate and model pollutant concentrations as well as to simulate the effect of the meteorological and geophysical conditions on the dispersion of a targeted pollutant. CALPUFF can be run for any specific location around the world and for any modeling type period selected by the user. Due to its flexibility, CALPUFF has been used in several research studies.
Over the past years, several CALPUFF-aided case studies have been published. Abdul-Wahab et al. (2011a) used CALPUFF software to measure and simulate the dispersion of sulfur dioxide (SO2) at the Mina Al-Fahal Refinery in the Sultanate of Oman. The study compared the application of this modeling system with Abdul-Wahab's (2003) study of the same location using the Industrial Source Complex Short Term (ISCST) model. Abdul-Wahab et al. (2011b) conducted another case study simulating the dispersion of sulfur dioxide (SO2) at Sohar Refinery in the Sultanate of Oman. Abdul-Wahab et al. (2012) evaluated the impacts of a SO2 release on workplace and ambient air quality at Al-Noor Production Station located in the southern desert of the Sultanate of Oman.
The impact of nitrogen oxides (NOx) has attracted the attention of several researchers, including Abdul-Wahab et al. (2013). The main focus of that study was to examine the impact of a region's geophysical and meteorological conditions on the dispersion of NO2 from a proposed refinery located in Canada. Another study for similar pollutant was done by Yu and Stuart (2013). Ghannam and El-Fadel, 2013a, Ghannam and El-Fadel, 2013b) and Tian et al. (2013) considered as examples of studies for which CALPUFF software was used to study concentrations of multiple pollutants. Recently, Abdul-Wahab et al. (2014) used CALPUFF to study the effect of meteorological conditions on the dispersion of an accidental release of hydrogen sulfide (H2S).
Although a significant amount of research related to CALPUFF modeling software has been published, few studies have considered the effect of vehicle emissions or investigated the dispersion of CO, NOx, and CO2 concentrations for line sources. The James Bay AirQuality Study Team (2009) and Rosemont Copper Company (2011) considered line source emissions in their research, but this most recent research paper concentrates on applying the knowledge gained by running CALPUFF modeling software to model the dispersion of CO, NOx, and CO2 concentrations. Despite the fact that traffic jams have become a serious matter there, the main aim of this study was to investigate the effect of vehicle emissions on the Sultan Qaboos University (SQU) environment.
This study has been divided into two main parts: a line source study which focuses on investigating the dispersion of CO, NOx, and CO2 for a street located within the university boundary, and a study which consider SQU as an area source of pollutants.
Section snippets
Description of the study area
Located in Muscat, the capital city of Sultanate of Oman, SQU was the first public university in the Sultanate. Fig. 1 shows a map of Oman with the location of the university, the study domain, highlighted. The construction of SQU commenced in 1982 in a total area of 6.8 km2; the first batch of students enrolled in 1986. The university initially started with five main colleges: Engineering, Medicine, Education, Agriculture, and Science. A year later, the College of Arts was established, with
Results and discussions
Fig. 6 shows a terrain map for the study location. As can be seen from the map, the terrain consists mainly of enormous ranges in height, which is related to the mountainous terrain that surrounds Muscat. Since Muscat is a coastal city, the meteorological conditions of the land are strongly affected by the sea. Result analyses will be divided into two parts: line source emissions and area source emissions.
Conclusion
It is crucial to make use of software models to investigate the influence of the meteorological and the geophysical conditions on the dispersion of vehicle emissions in the environment. For this purpose, the impact of vehicle emissions on SQU environment was examined. Three vehicle pollutants, CO, NOx, and CO2, were considered in the case study. The study was divided into two main sections: a line source study, which focused on investigating the dispersion of the selected pollutants for a
References (21)
- et al.
Effects of meteorological conditions on the concentration and dispersion of an accidental release of H2S in Canada
Atmos. Environ.
(2014) - et al.
Emissions characterization and regulatory compliance at an industrial complex: an integrated MM5/CALPUFF approach
Atmos. Environ.
(2013) - et al.
Current status and future trends of SO2 and NOx pollution during the 12th FYP period in Guiyang city of china
Atmos. Environ.
(2013) SO2 dispersion and monthly evaluation of the industrial source complex short-term (ISCST32) model at Mina Al-Fahal refinery, Sultanate of Oman
Environ. Manage.
(2003)An application and evaluation of the CAL3QHC model for predicting carbon monoxide concentrations from motor vehicles near a roadway intersection in Muscat, Oman
Environ. Manage.
(2004)- et al.
Application of California puff (CALPUFF) model: a case study for Oman
Clean Technol. Environ. Policy
(2011) - et al.
Evaluating the performance of an integrated CALPUFF-MM5 modeling system for predicting SO2 emission from a refinery
Clean. Technol. Environ. Policy
(2011) - et al.
Impacts on ambient air quality due to flaring activities in one of Oman's oilfields
Arch. Environ. Occup. Health
(2012) - et al.
Impact of geophysical and meteorological conditions on the dispersion of NO2 in Canada
Air Qual. Atmos. Health
(2013) Methods to Find the Cost-effectiveness of Funding Air Quality Projects, for Evaluating Motor Vehicle Registration Fee Projects and Congestion Mitigation and Air Quality Improvement (CMAQ) Projects
(2010)