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首页> 外文会议>Specialty Conference on Emission Inventory: Living in a Global Environment Vol.2 Dec 8-10, 1998, New Orleans, LA >Visibility Measurements and Calculation of the Deciview Metric For Visibility Analyses in Wyoming
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Visibility Measurements and Calculation of the Deciview Metric For Visibility Analyses in Wyoming

机译：怀俄明州可见性分析的可见度测量和Deciview度量的计算

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摘要

On July 31, 1997, the U. S. Environmental Protection Agency proposed regulations for Regional Haze in the Federal Register (FR Vol. 62, No. 147). As drafted, the proposed regulation would severely impact future industrial development in areas near Class I areas, or at a minimum be very costly. Facilities located within 150 kilometers of a Class I area may also be affected as part of New Source Review or Prevention of Significant Deterioration permit applications for new operations or modifications to existing facilities. As part of the proposed regulation, EPA introduced the deciview (dv) metric to be used as part of visibility improvement and degradation evaluations. This metric will be more restrictive to industry than the newly promulgated National Ambient Air Quality Standards for particulate matter. This paper examines current dv calculation methodologies and presents examples of the extreme conservatism of the results. The relationship between variables in the methodologies and calculated dv changes are also examined. In addition, the paper presents a comparison of calculated dv values and visibility and meteorological parameters measured in the Bridger Wilderness Area. Based on these comparisons, threshold emission limits for dv changes are derived for a hypothetical facility. Finally, a comparison of industrial facility and prescribed burning visibility impacts is presented.
机译：1997年7月31日，美国环境保护局在《联邦公报》中提出了有关区域烟霾的法规（FR第62卷，第147号）。如草拟的那样，拟议的法规将严重影响I类地区附近地区的未来工业发展，或者至少代价很高。位于“ I类”区域150公里以内的设施也可能会受到“新污染源审查或防止严重恶化许可证”申请新运营或对现有设施进行改造的一部分的影响。作为拟议法规的一部分，EPA引入了deciview（dv）度量标准，以用作可见度改进和降级评估的一部分。与新颁布的颗粒物国家环境空气质量标准相比，该指标对工业的限制更大。本文研究了当前的dv计算方法，并举例说明了结果的极端保守性。方法学中的变量与计算出的dv变化之间的关系也将被检查。此外，本文还对计算出的dv值以及在布里奇尔荒野地区测得的能见度和气象参数进行了比较。根据这些比较，得出假设设施的dv变化的阈值排放限值。最后，比较了工业设施和规定的燃烧能见度影响。

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