Dispersion Modeling Guidance for Airports Addressing Local Air Quality Health Concerns (2017) / Chapter Skim
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16 4.1 Input Data Requirements On May 29, 2015, FAA revised its policy on air quality modeling procedures to identify the Aviation Environmental Design Tool (AEDT) Version 2b as the required model to perform air quality analyses for aviation, replacing EDMS.
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Models versus Data Inputs 17 take-off with a dimension of 200 m × 20 m, thus yielding an aspect ratio of 10.0, which is retained in both AERMOD and CALPUFF modeling. Ideally, all area sources in CALPUFF should have an aspect ratio of less than 2.0.
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18 Dispersion Modeling Guidance for airports addressing Local air Quality health Concerns height (provided in EDMS) , to construct volume sources.
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Models versus Data Inputs 19 Table 3 presents computational times in CPU-hours taken by the four modeling systems to perform the modeling for the LAX AQSAS for the winter and summer seasons. As seen in Table 3, SCICHEM modeling run times are prohibitively long.
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