- 學位論文
台灣南部濕地甲烷排放於大氣之監測與分析
Monitoring and Analysis of Methane Emission from Wetlands in Southern Taiwan
摘要
本研究係針對台灣南部數個濕地，進行甲烷空氣品質監測與排放係數實測，以助於瞭解並推估甲烷在溫室氣體之貢獻量。本研究首先篩選四種不同類型之濕地：四草濕地 (自然海岸濕地)、葫蘆埤濕地 (自然內陸濕地)、灣裡濕地 (人工海岸濕地)及嘉南藥理科技大學人工濕地 (人工內陸濕地)。接續分批實地採集各濕地之大氣樣品，並分析溫室氣體甲烷 (CH4)、非甲烷碳氫化合物 (NMHC)及總碳氫化合物 (THC)等數據，以進一步探討各濕地甲烷大氣濃度之變化。由所測得數據判斷排放量變化與鄰近環保署空品站監測數據之相關性。 經2009年12月至2010年7月之調查，結果顯示四草濕地、葫蘆埤濕地、灣裡濕地及嘉南藥理科技大學人工濕地平均甲烷大氣濃度分別為2.0、1.9、2.0及1.8 ppm，鄰近的EPA四個監測站安南監測站、新營監測站、台南監測站及仁武監測站平均甲烷大氣濃度分別為1.8、1.9、1.7及1.7 ppm，並無顯著差異。另一方面，在四草濕地與葫蘆埤濕地甲烷釋出量範圍分別為0.23~0.48及0.31~0.90 mg/m2/h葫蘆埤略高，此數值比國內濕地文獻中之自然濕地略高。本研究監測之數據將有助於瞭解濕地甲烷在溫室氣體所扮演角色及其貢獻量；此外，本研究建議應建立長期與持續的監測調查，以充分了解濕地甲烷氣體的動態與擴散變化的全貌。
並列摘要
In this study, methane air-quality and release flux are monitored for wetlands in southern Taiwan. Four types of wetlands are used as case studies: natural coastal wetland (as Siu-Trao Wetlands), natural inland wetland (Hu-Lu-Pi Wetland), artificial coastal wetland (Wan-Li Wetland), and artificial inland wetland (CNPST Wetland). In methane air-quality monitoring, various methane, non-methane hydrocarbon (NMHC), and total hydrocarbon (THC) are discussed to understand the distribution in the atmosphere around wetlands and to compare the difference with neighboring EPA monitoring stations. The samples were collected from December 2009 to July 2010. Results indicate several findings. First, the average atmospheric methanes are 2.0, 1.9, 2.0, and 1.8 ppmv for the four wetlands: Siu-Trao, Hu-Lu-Pi, Wan-Li, and CNPST Wetlands, respectively. Their respect methane of neighboring EPA monitoring stations are 1.8, 1.9, 1.7, and 1.7 ppmv for the four stations: An-Nan, Hsin-Ing, Tainan, and Ren-Wu stations, respectively. Second, the release fluxes are 0.23-0.48 and 0.31-0.90 mg/m2/h for Siu-Trao and Hu-Lu-Pi Wetlands, respectively. The fluxes are slightly higher more than other wetlands in Taiwan. The in-situ monitoring data and their further analysis may be helpful for accounting to the contribution of methane in wetlands. In addition, this study suggests long-term and continuous monitoring projects are necessary for realizing the dynamic and variation of methane in wetlands.