請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/45497
標題: Retrospective assessment of air quality management practices in Taiwan
作者: Kuo, P.H.
莊秉潔
Ni, P.C.
Keats, A.
Tsuang, B.J.
Lan, Y.Y.
Lin, M.D.
Chen, C.L.
Tu, Y.Y.
Chang, L.F.
Chang, K.H.
林明德
關鍵字: Air quality model
Source apportionment
Gaussian plume model
Emission
controls
plume trajectory model
source/receptor relationship
performance
evaluation
secondary aerosols
primary pollutants
part ii
pollution
pm10
quantification
urban
期刊/報告no:: Atmospheric Environment, Volume 43, Issue 25, Page(s) 3925-3934.
摘要: In 1995, Taiwan's Environmental Protection Administration (EPA/TW) instituted a policy of levying emission taxes on polluters in order to combat the rampant national issue of pollution. Since that time, pollution control strategies, tightening exhaust emission standards for industry, improvements in fuel quality, and new stricter vehicle emission standards, etc., have been implemented. This study evaluates the effectiveness of these measures and examines the improvement of Taiwan's air quality. In this paper, we conduct a detailed analysis of change in the concentrations of pollutants (SO(2), NO(x) and particulate matter [PM]) between two three-year periods (from 1996 to 1998 and from 2000 to 2002). The pollution levels were generally lower in the latter period. Concentrations at 14 EPA/TW stations in central Taiwan were simulated and source apportionment analyses in three of Central Taiwan's largest cities were conducted using a trajectory transfer-coefficient air quality model. Correlation coefficients (r) between simulations and observations for the monthly means of the concentrations of SO(2). NO(x), PM(2.5) and PM(10) during the study periods at the 14 stations are 0.56, 0.63, 0.70 and 0.31, respectively. The sulfur control policy greatly reduced SO(2) concentration island-wide, a stringent emission standard put into place for gasoline vehicles reduced NO(x) concentration along highways, and an emissions tax placed on construction sites, as well as a regular program for road-dust sweeping, reduced primary particulate matter. Among all of the pollution abatement policies implemented, the most effective method for reducing PM(2.5) concentrations in the three largest cities involved the reduction of fine ammonium sulfate aerosols from point sources (56-63% of net PM(2.5) reduction). The next largest reduction was attributed to a diminishment in primary PM(2.5) emanating from point sources (27-56% of net PM(2.5) reduction). Secondary particulate matter, especially sulfate, was reduced from distances up to 150 km leeward of major pollution point sources such as Taichung Power Plant. (C) 2009 Elsevier Ltd. All rights reserved.
URI: http://hdl.handle.net/11455/45497
ISSN: 1352-2310
文章連結: http://dx.doi.org/10.1016/j.atmosenv.2009.04.045
顯示於類別:環境工程學系所

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