摘要(英) |
Shenao thermal power plant, located in the northeast of Taiwan near Keelung city, had been stopped operating in the end of September, 2007. Thermal power plant is the main source of the air pollution. According to Taiwan’s EPA TEDS8.1 database (2010 baseline year), Xiehe thermal power plant is the main source of the sulfer oxides in the northeast of Taiwan. The changes of the air quality after Shenao power closing is worth to analyze and discuss.
There are three factors of the decrease of the concentration of sulfer oxides: the changes of the wind field, the increase of the precipitation and the local emissions decreased of the concentration of sulfer oxides. The coeficion of the ratios of the eight wind directions before and after the five year of the Shenao power plant closing reachs 0.8 while using EPA’s air quality monitoring station (AQS) in the northeast of the Taiwan, 0.9 using CWB’s manual weather station. The wind field environment was not change clearly because of the high coeficion. During 2002-2012, the trend of the precipitation hour raise in the northeast of Taiwan. After Shenao power plant closing, the accumulate precipitation gain in fall and winter and decrease in spring for most of the weather station. The precipitation is not the main machenism of the concentration decreased SO2 of after Shenao power plant because the mean concentration of SO2 in dry day after Shenao power plant closing is lower than that in wet day before Shenao power plant closing. We make sure the concentration decreased of SO2 is highly related to the local emission decreased. Most of the numbers of 10% of the maximum concentration of SO2 are related to Xiehe power plant. Before Shenao power plant closing, Shenao and Xiehe power plant is the main source of SO2 for 1% of the maximum concentration stastitic. Between Oct 2007 and Sep 2012, the east wind part of the concentration of SO2 decreased most, and the northwest wind part decreased least. We can distinguish the impacts of the atmospheric environment between Shenao and Xiehe power plant.
We use HYSPLIT to simulate the forward trajectories of Shenao and Xiehe power plant emission between 2005 and 2010 and discuss the influence of the EPA’s AQS. Northeast wind is the main wind field from September to April, and southwest wind is the main wind field form May to August. The large scale of the wind field changes less between 2005 and 2010. The frequency of the trajectory of the high concentration of SO2 decreased evidently in October 2007. It is related to the emission loss of Shenao power plant and is not related to the wind field change. |
參考文獻 |
行政院環境保護署,中華民國空氣品質監測報告102年年報,行政院環境保護署,臺北,民國102年。
林春利、程萬里、張家豪、白玨玲,「台中火力發電廠排煙脫硫設備(FGD)對中部地區空品之探討」中華民國環境保護學會學刊,25,1,54-81,民國91年。
林能暉,「酸沈降之源與受體關係之研究:氣流軌跡分析及降水系統影響」,NSC87-EPA-P-008-003,行政院環境保護署,民國87年。
南少傑、梁美生、段寧、柴發合、許亞宣,「山西省燃煤電廠二氧化硫減排對硫沉降的影響分析,氣象與環境學報,25,3,44-47,2009。
柳中明、羅俊光、左台利、王作臺、徐光蓉,「台灣西北海岸夏初背景SO2與CO測量與分析」,大氣科學,22,111-127,民國83年。
洪麗娟,「1996-2008年台灣降雨的特性分析」,國立中央大學,碩士論文,民國98年。
郭妹涵,「高解析度空氣汙染擴散模擬模式的發展」,國立中央大學,碩士論文,民國99年。
監察院,098000368台電深澳電廠擴建案調查報告對外公布,監察院,民國100年。
EEA, Air pollution from electricity-generating large combustion plants, Copenhagen: EEA. 2008, ISBN 978-92-9167-355-1.
Draxler, R., R., and G. D. Hess, 1998: An overview of the HYSPLIT_4modelling system for trajectories, dispersion and deposition, Aust. Meteorol. Mag., 47, 295-308.
M. P. Buhr, M. Trainer, D. D. Parrish, R. E. Sievers and F. C. Fehsenfeld, 1992: Assessment of pollutant emission inventories by principal component analysis of ambient air measurements. Geophy. Res. Let., 19, 1009-1012.
Pope CA et al, 2002. Lung cancer, cardiopulmonary mortality, and long-term exposure to fine particulate air pollution. Journal of the American Medical Association, 287:1132–1141.
Seinfild, John H., Atmospheric chemistry and physics: form air pollution to climate change / John H. Seinfild, Spyros N. Pandis.- 2nd ed., A Wiley- interscience publication., the United States of America, 2006.
Sheng-Po Chen; Chih-Chung Chang; Jyh-Jian Liu; Charles C.-K. Chou; Julius S. Chang; Jia-Lin Wang, 2014: Recent improvement in air quality as evidenced by the island-wide monitoring network in Taiwan. Atmospheric Environment, 96, 70-77. doi:10.1016/j.atmosenv.2014.06.060.
Tov Elperin , Andrew Fominykh, Boris Krasovitov, 2013: Rain scavenging of soluble gases by non-evaporating and evaporating droplets from inhomogeneous atmosphere. Meteorol Atmos Phys, 122, 215-226.
W.C. Wang, K.S. Chen, S.K. Wang, H.C. Lee, M.Y. Tsai, 2009: Modeling atmospheric PM10 concentrations during severe pollution events in southern Taiwan. Atmospheric Research, 92, 159-171.
World Health Organization, WHO Air quality guidelines for particulate matter, ozone, nitrogen dioxide and sulfur dioxide. Global update 2005. Summary of risk assessment. World Health Organization, 2005. |