| Summary: | 碩士 === 國立屏東科技大學 === 環境工程與科學系所 === 99 === In 2009, the heavy rains of Typhoon Morakot caused severe floods (“Floods 88”) and severely damaged the southern Taiwan. This study used the PM2.5 and PM2.5-10 data of Pingtung and Chaochou air quality monitoring stations from January 2008 to December 2010 to estimate the impact of Floods 88 on the air quality of Pingtung County. The results showed that after Floods 88 (September 2009 – January 2010) the PM10 concentration of Pingtung and Chaochou air quality monitoring stations increased significantly (by about 11–42%). In comparison to the monthly average PM2.5-10 concentrations from August to October 2008, those from August to October 2009 (right after Floods 88) increased 26, 30 and 93%, respectively, at the Pingtung air quality monitoring station, while the corresponding increases in PM2.5-10 concentration were 44, 53 and 85%, respectively, at the Chaochou air quality monitoring station. At both stations, October had the highest increase in PM2.5-10 concentration among the months for the data analysis; however, the change in PM2.5 concentration was negligible during these months. It is referred that the increase of PM10 after Floods 88 resulted mainly from the raise of coarse particle concentration. The phenomenon is associated with the emission of large amount of fugitive coarse particles from mud cleaning, river dredging, and sludge transporting operations after Floods 88.
|
|---|
