THESIS
2013
xiv, 171 pages : illustrations (chiefly color), maps (chiefly color) ; 30 cm
Abstract
In recent years, Mainland China, and in particular the industrial hotbed of the Pearl River
Delta (PRD) has experienced an increasingly serious problem of high concentrations of
airborne particulate matter. Following the tightening-up of China’s air quality policies in
recent years, and with especially fine particles now added to a new air quality objective, the
identification of major source regions and major types of pollutants has become critical
important. In this study, a source-oriented method (Particulate Source Apportionment
Technology: PSAT) implemented in 3-D Comprehensive Air Quality Model (CAMx), has
been applied to analyze how different emission activities impact fine particle concentration in
the PRD region. By using this method, a detailed source region and emissi...[
Read more ]
In recent years, Mainland China, and in particular the industrial hotbed of the Pearl River
Delta (PRD) has experienced an increasingly serious problem of high concentrations of
airborne particulate matter. Following the tightening-up of China’s air quality policies in
recent years, and with especially fine particles now added to a new air quality objective, the
identification of major source regions and major types of pollutants has become critical
important. In this study, a source-oriented method (Particulate Source Apportionment
Technology: PSAT) implemented in 3-D Comprehensive Air Quality Model (CAMx), has
been applied to analyze how different emission activities impact fine particle concentration in
the PRD region. By using this method, a detailed source region and emission category
contribution matrix is derived for all regions within the Hong Kong/PRD region. Source
appointment results shows that, in summer and spring time, emissions inside PRD region are
the major fine particle sources, contribution 70.7% (11.2 μg/m
3) and 52.5% (13.1 μg/m
3) to
the total figure. Super-regional transports are found to be significant in autumn and winter,
contribution 58.5% (20.2 μg/m
3) and 64.6% (27.8 μg/m
3) of the total fine particles in PRD and
Hong Kong region. Another important cause of high PM levels has been the transport of fine
particles between cities within the PRD region, with three different regions selected for
detailed analysis. Results show that mobile vehicle and industry emission are the two major
sources for fine particles. Meanwhile, over the same period in Hong Kong, marine proved to
be another very significant source of particle pollutant in addition to the significant impact
from motor vehicle. Results show that for the Hong Kong/PRD region local reduction of mobile sources and collaboration between different areas could have succeeded in alleviating
the air pollution problem.
Post a Comment