| Summary: | 碩士 === 國立臺灣大學 === 環境工程學研究所 === 93 === Abstract
The study aimed on the effect of pollutants from open burning of agriculture waste of aftergrowth rice by analyzing the ambient air monitor data of the last three years from Taiwan EPA. Source district was defined when there has significant statistical increment of primary pollutants happened in upwind area. Utilizing the forward trajectory calculate by meteorological preprocess module and trajectory module of Trajectory Photochemical Air Quality Model (TPAQM) to find the corresponded receptor district, the increment concentration of primary and secondary pollutants of receptor district can be obtained as the difference of observed and hourly ensemble mean of the month.
To gather statistics of the case for agriculture waste open burning in the past three years, I classify it for the 27 local incident case and 7 extensive incident case. Although there are more sufficient precursors for photochemical reaction in the extensive incident cases, but the increment of secondary pollutants is less than the local incident case, one reason of the inference is that concentration of extensive incident among the case usually is more than 200∼300 ,and it will influence the shining of sunshine going on of unfavorable photochemical reaction. Another is that it receives the influence of the meteorological cloudiness of factor. The extensive incidents often take place in the total cloudiness under 0.5, its reason may be the behavior concentrating shortly on open burning agriculturally waste before the rainfall will come mostly for Taiwan peasants.
To count the hour-average increment comparing with the moon while chasing equally hour of primary and secondary pollutants of source and acceptor district, increment part in the source district is O3 3.76 ppb, CO 0.489 ppm, PM10 73.14 , NOX 26.44 ppb, THC 0.88 ppmc, NMHC 0.49 ppmc; the increment part of the receptor district is O3 13.47 ppb, CO 0.098 ppm,PM10 34.68 ,NOX 3.93 ppb, THC 0.218 ppmc, NMHC 0.148 ppmc.
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