Research On Air Pollutant Emission Inventory In The Western Taiwan Straits Economic Zone

In recent years, air pollution caused by the rapid economic development, population growth and industrial expansion is getting more serious and thus threaten public health and safety, as well as sustainable development of national economy. The West Coast of Taiwan Straits is an important junction for cross-strait exchange. Developing an emission inventory of air pollutants in this region not only provides the necessary data for improving air quality, but also has an impact on scientific development of other cities.The emission inventories of SO2, NOX, PM10, PM2.5, VOCS, CO and NH3in the Western Taiwan Straits Economic Zone including11cities (Fujian province, Wenzhou and Shantou) in the baseline year2009were established based on the pollution source census, statistical yearbooks, industrial activities and residential activities. The spatial allocations of emissions in the Western Taiwan Straits Economic Zone was developed by utilizing the GIS technology in0.05degree. In addition, the emission inventories in the year of2015were calculated using scenario analysis method based on the national and regional12th Five-Year Plans.First of all, an introduction of calculating emissions for varies source types was made. In order to developing an emission inventories which is consistent with the actual situation, both methods of investigate and survey and emission factors were used for stationary sources and moving sources. Emission factors were confirmed based on summarizing literature and related material. Emission of air pollutants were calculated by combining emission factors and data of activity level from statistical information. Fugitive emission sources included construction dust, industrial fugitive dust, domestic fuel burning, livestock, and biomass burning. In addition, biogenic volatile organic compounds were calculated by using an emission model named GloBEIS. The total emissions of SO2, NOX, PM10, PM2.5, VOCS, CO and NH3were estimated to be47.61x104t,62.10x104t,182.77x104t,48.00x104t,168.82x104t,164.75x104t and24.80x104t, respectively.The results of emission inventory were analyzed including source contribution, spatial allocation, comparison between similar research and uncertainty analysis. Power plant contributed the most emission of SO2, NOX, PM10and PM25, accounting for21.84%,31.37%,41.10%and40.82%, respectively. Emission from biogenic volatile organic compounds is the highest in the VOCS emission sources, accounting for54.11%. The vehicle and livestock contributed the most in CO and NH3emission, accounting for88.16%and49.68%. The relative high emission areas of SO2and NOX were consistent with the locations of stationary sources. High emission areas of PM10. PM2.5and CO showed a linear distribution, meanwhile, NH3showed polygon characteristic. In addition, the high emission areas of all pollutants concentrated upon coastal region. The uncertainty of SO2, NOX, PM10, PM2.5, VOCS, CO, and NH3were30.58%,33.99%,43.70%,39.76%,65.55%,68.82%and56.38%by propagation of error.On the basis of emission inventory of2009, a forecast of emission inventory from2010to2015was made combining national and regional development plan. The total emissions of SO2, NOX, PM10, PM2.5, VOCS and NH3in the year of2015were estimated to be41.68×104t,63.00×104t,218.59×104t,57.59×104t,121.79×104t and23.96×104t, respectively. Comparing with the emissions of2009, the rates of increasing were-12.46%,1.60%,19.59%,19.97%,74.01%and-3.49%, respectively. The emission of SO2and NOX would decline22.54%and10.95%during the12th Five-Year and meet the target of air pollutant control planning in the Western Taiwan Straits Economic Zone.