【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O₃的环境影响。结果表明,规划项目对区域O₃的最大影响出现在O₃污染高发时段7月,O₃小时浓度最大可增加12μg/m³左右,日最大8小时平均浓度最大可增加2μg/m³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/m³左右,日均浓度最大可增加5μg/m³左右,年均浓度最大可增加2μg/m³左右。通过与模拟的区域PM_2.5和O₃本底值叠加可以看出,规划项目对所在评价区域内O₃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/m³）。更多还原

【Abstract】 The influence of a planned project emissions on regional PM_2.5 and O₃ concentrations was studied. The modeling results show that the largest impact from the planned project on ground O₃ occurs in July,with the highest hourly concentration increment of 12 μg/m³ and maximum daily 8-h concentration increment of 2 μg/m³. 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/m³,the highest daily concentration increment of 5 μg/m³,and the highest annual concentration increment of 2 μg/m³. The added-up O₃ 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.更多还原