空气质量模型在规划环评中的应用案例
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摘要
通过CAMx模型对某工业园区的规划项目进行了实际案例研究,模拟了该规划项目对评价区域内PM_(2.5)和O_3的环境影响。结果表明,规划项目对区域O_3的最大影响出现在O_3污染高发时段7月,O_3小时浓度最大可增加12μg/m~3左右,日最大8小时平均浓度最大可增加2μg/m~3左右;规划项目对区域PM_(2.5)的最大影响基本上出现在PM_(2.5)污染高发时段秋冬季,PM_(2.5)小时浓度最大可增加20μg/m~3左右,日均浓度最大可增加5μg/m~3左右,年均浓度最大可增加2μg/m~3左右。通过与模拟的区域PM_(2.5)和O_3本底值叠加可以看出,规划项目对所在评价区域内O_3的影响满足空气质量标准,但PM_(2.5)年均浓度区域本底值已超过国家空气质量二级标准(35μg/m~3)。
The influence of a planned project emissions on regional PM_(2.5) and O_3 concentrations was studied. The modeling results show that the largest impact from the planned project on ground O_3 occurs in July,with the highest hourly concentration increment of 12 μg/m~3 and maximum daily 8-h concentration increment of 2 μg/m~3. It also shows that the largest impact from the planned project on ground PM_(2.5) happens in winter,with highest hourly concentration increment of 20 μg/m~3,the highest daily concentration increment of 5 μg/m~3,and the highest annual concentration increment of 2 μg/m~3. The added-up O_3 concentration attains the national ambient air quality standards( NAAQS); however,the regional background PM_(2.5) concentrations has already violated the NAAQS,requiring emission adjustment and reduction measures from the planned project.
The influence of a planned project emissions on regional PM_(2.5) and O_3 concentrations was studied. The modeling results show that the largest impact from the planned project on ground O_3 occurs in July,with the highest hourly concentration increment of 12 μg/m~3 and maximum daily 8-h concentration increment of 2 μg/m~3. It also shows that the largest impact from the planned project on ground PM_(2.5) happens in winter,with highest hourly concentration increment of 20 μg/m~3,the highest daily concentration increment of 5 μg/m~3,and the highest annual concentration increment of 2 μg/m~3. The added-up O_3 concentration attains the national ambient air quality standards( NAAQS); however,the regional background PM_(2.5) concentrations has already violated the NAAQS,requiring emission adjustment and reduction measures from the planned project.
引文
[1] ENVIRON. CAMx User’s Guide,Version 6. 40[M]. Novato,CA:ENVIRON International Corporation,2014.
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[2] Kurokawa J,Ohara T, Morikawa T, et al. Emissions of air pollutants and greenhouse gases over Asian regions during 2000–2008:Regional Emission inventory in Asia(REAS)version 2[J].Atmospheric Chemistry&Physics,2013,13(4):10049-10123.
[3]陈云波,徐峻,何友江,等.北京市冬季典型重污染时段PM2. 5污染来源模式解析[J].环境科学研究,2016,29(5):627-636.
[4]杜晓惠,徐峻,刘厚凤,等.重污染天气下电力行业排放对京津冀地区PM2. 5的贡献[J].环境科学研究,2016,29(4):475-482.
[5] Yarwood G,Stoeckenius T E,Wilson G,et al. Development of a methodology to assess geographic and temporal ozone control strategies for the South Coast Air Basin[M]. South Coast Air Quality Management District,Diamond Bar,CA,1996.
[6] Yarwood G,Morris R E,Wilson G M. Particulate matter source apportionment technology(PSAT)in the CAMx photochemical grid model[M]. Boston,MA:Springer,2007.