Characteristics of Acid Precipitation in the Taipei City(1981-1997)
碩士 === 國立東華大學 === 自然資源管理研究所 === 86 === Rainfall samples collected at the Taipei Botanical Garden from 1981 to 1997 were analyzed for pH, specific conductivity, and major ions. Basic statistics, seasonal patterns, deposition flux of the chemicals, and correlation among ions were examined to provide a...
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ndltd-TW-086NDHU01480082015-10-13T11:06:17Z http://ndltd.ncl.edu.tw/handle/10395047272539807096 Characteristics of Acid Precipitation in the Taipei City(1981-1997) 台北市酸沈降特性分析(1981-1997年) Chang Ya-Ping 張雅萍 碩士 國立東華大學 自然資源管理研究所 86 Rainfall samples collected at the Taipei Botanical Garden from 1981 to 1997 were analyzed for pH, specific conductivity, and major ions. Basic statistics, seasonal patterns, deposition flux of the chemicals, and correlation among ions were examined to provide a baseline data for Taipei. Average of volume-weighted pH value of the rainfall was 4.91 and ranged from 3.15 to 7.66. Among the total 1089 rainfall events, 78% of them had pH value below 5.65. Monthly averages of the pH value were highest in October and lowest in July. In general, the pH values had an increased trend over the past 17 years in Taipei. The seasonal difference of pH values between summer and winter was significant. Both the pH value and ion concentrations were lower in summer and higher in winter. Annual total deposition of ammonium gradually increased from 10.2 kg/ha/y in 1981 to 45.7 kg/ha/y in 1997. Nitrate was also gradually increased from 3.5 kg/ha/y to 12.9 kg/ha/y over these years. The most contribution anions were sulfate, chloride and nitrate. For the cations, calcium, ammonium and sodium were the most contribution ones. Major neutralization ions in the precipitation were calcium, ammonium and magnesium. The equivalent ratio of NO3-/SO42- was comparable with the Northeast of United States and Europe region. Yue-Joe Hsia Hen-Biau King 夏禹九 金恆鑣 1998 學位論文 ; thesis 0 zh-TW |
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zh-TW |
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Others
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碩士 === 國立東華大學 === 自然資源管理研究所 === 86 === Rainfall samples collected at the Taipei Botanical Garden from 1981 to 1997 were analyzed for pH, specific conductivity, and major ions. Basic statistics, seasonal patterns, deposition flux of the chemicals, and correlation among ions were examined to provide a baseline data for Taipei. Average of volume-weighted pH value of the rainfall was 4.91 and ranged from 3.15 to 7.66. Among the total 1089 rainfall events, 78% of them had pH value below 5.65. Monthly averages of the pH value were highest in October and lowest in July. In general, the pH values had an increased trend over the past 17 years in Taipei. The seasonal difference of pH values between summer and winter was significant. Both the pH value and ion concentrations were lower in summer and higher in winter. Annual total deposition of ammonium gradually increased from 10.2 kg/ha/y in 1981 to 45.7 kg/ha/y in 1997. Nitrate was also gradually increased from 3.5 kg/ha/y to 12.9 kg/ha/y over these years. The most contribution anions were sulfate, chloride and nitrate. For the cations, calcium, ammonium and sodium were the most contribution ones. Major neutralization ions in the precipitation were calcium, ammonium and magnesium. The equivalent ratio of NO3-/SO42- was comparable with the Northeast of United States and Europe region.
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author2 |
Yue-Joe Hsia |
author_facet |
Yue-Joe Hsia Chang Ya-Ping 張雅萍 |
author |
Chang Ya-Ping 張雅萍 |
spellingShingle |
Chang Ya-Ping 張雅萍 Characteristics of Acid Precipitation in the Taipei City(1981-1997) |
author_sort |
Chang Ya-Ping |
title |
Characteristics of Acid Precipitation in the Taipei City(1981-1997) |
title_short |
Characteristics of Acid Precipitation in the Taipei City(1981-1997) |
title_full |
Characteristics of Acid Precipitation in the Taipei City(1981-1997) |
title_fullStr |
Characteristics of Acid Precipitation in the Taipei City(1981-1997) |
title_full_unstemmed |
Characteristics of Acid Precipitation in the Taipei City(1981-1997) |
title_sort |
characteristics of acid precipitation in the taipei city(1981-1997) |
publishDate |
1998 |
url |
http://ndltd.ncl.edu.tw/handle/10395047272539807096 |
work_keys_str_mv |
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