頁籤選單縮合
題名 | 花蓮縣空氣品質指標目標擬議=A Proposal for the Goals of PSI Related Indicators to Evaluate Air Quality on Hualien, Taiwan |
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作者 | 戴文堅; 江漢全; 林智賢; | 書刊名 | 環境保護 |
卷期 | 30:1 2007.06[民96.06] |
頁次 | 頁50-58 |
分類號 | 445.63 |
關鍵詞 | 空氣污染物標準指數; PSI≦50日數累計百分比; 空氣品質目標值; 花蓮縣; PSI; Air quality; t distribution; Hualien; |
語文 | 中文(Chinese) |
中文摘要 | 空氣品質指標是進行一個地區空氣品質規劃與管理的重要工具。花蓮縣環境保護計畫近年選用PSI及PSI≦50作為空氣品質評估之指標,並訂定2007年、2009年、2011年之PSI值目標為36,而PSI≦50之目標則為>90%。然而,這些目標值是否過嚴或過鬆?其合理性仍有待探討。在未來空氣污染負荷無巨大變化,且花蓮縣能有效維護目前空氣品質的前提下,本研究係利用二種不同年份尺度之監測資料,依t分佈理論,求得本省各空品區歷年測值PSI及PSI≦50值,90%信賴區間(90%CI)之範圍,以評估花蓮縣空氣品質指標目標值之適切性。統計結果顯示,在PSI值方面,2000~2005年(6年尺度)間,花蓮縣PSI值平均為35,90%CI為32.24~37.41;而1995~2005 (11年尺度)間,花蓮縣PSI值平均為37,90%CI為35.10~38.18。在PSI≦50方面,2000~2005年間,花蓮縣PSI<50平均為86.74%,90%CI為83.15~90.34%;而1995~2005年間,花蓮縣PSI≦50平均為84.79%,90%CI為82.00~87.58%。由這些數值可知,花蓮縣環境保護計畫所訂之PSI值目標值應屬合理可行,但PSI≦50目標值則有高估,建議修正為>86%或82~90%。 |
英文摘要 | The use of pollutant standards index (PSI) related indicators are valuable tool in predicting both spatial and temporal changes in the air quality in a region. In Hualian County which located eastern Taiwan, the local government adopts the PSI value and the percentage of days with PSI lower than 50 (PSI≦50) to detect the variation of air quality. Furthermore, the government has set up goals for PSI value of 36 and PSI≦50 of 90% at 2007, 2009 and 2011. However, its rationality warrants further discussion. Under the premise that the air pollution loading will not change greatly in the future and the air quality can be effectively maintained in Hualien County, this research uses annual monitored data from two scales of different years to calculate the PSI values, means of PSI≦50 and 90% confidential intervals (90% CI) by using t distribution theory. Then they are used to suggest the goals of PSI related indicators for Hualien County. For the PSI values in Hualien County in the years of 2000 to 2005, the 90% CI is (32.24, 37.41) with a mean value of 35. While the PSI values in the years of 1995 to 2005, the 90% CI is (35.10, 38.18) with a mean value of 37. For the PSI≦50 indicator, the annual average of PSI≦50 is 86.74% and 90% CI is (83.15%, 90.34%) for Hualien County during the years of 2000 to 2005. While it is 84.79%, and 90% CI is (82.00%, 87.58%) during the years of 1995 to 2005. As a result, these data indicated that the goals on PSI values of Hualien County is reasonable, but goals on PSI≦50 is over estimated. It is suggested that the PSI≦50 goals should be revised to >86% or 82-90%. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。