多變量統計分析臺北市近郊的灌溉水質汚染

以因子分析方法評估臺北市近郊七星灌區的灌溉水質。主要的調查區域是關渡－洲美平原，設有十二個水質監測點，包括進入該區域的主要水系，如八仙圳、基隆河、貴子坑溪與水磨坑溪。另有位於南港的零星農田，設有二個監視點。經過三年八次的調查分析結果顯示，主要的汚染型態可以區分為鹽分、重金屬與營養分過高三種。鹽分高的地方是引用基隆河的洲美抽水機圳與八仙圳的下游。重金屬汚染主要是銅、鋅、汞，集中在草濫埤，是受工廠汚染所致。在水磨坑圳有發現鉛，汚染源是汽機車修理廠的廢水。貴子坑溪有逐漸優養化與鹽分增高現象，這對關渡濕地的保育有不利的影響。

關鍵字

因子分析；濕地；重金屬

並列摘要

The use of irrigation water quality from the Chih-Sin Irrigation Association which is located in Taipei suburb as input data for factor analysis. Main investigated areas are Kwan-Do and Zou-Mei District, and twelve monitoring points have been established among four major water inlets: Eight-Sen chanel, Ki-Long river, Kai-Zu-Kong stream and Sei-Mo-Kong stream. Other two monitoring points are located in Nong-Kon. Samples were analyzed eight times during as three-years period. Three pollutant patterns can be classified by factor analysis. These are salinity, heavy metals and over-fertilization. High salinity have been appeared in Zow-Mei water pumping canal and downstream of Eight-Sen Channel. Heavy metals (Cu, Zn and Hg) have been appeared in Weed-Zan Lake, which is polluted by nearby industries. The Sei-Mo-Kong stream also found out Pb pollution, which was polluted by automobile repairment companies. The Kai-Zu-Kong stream have shown eutrophication and increasing salinity in recent investigation. Degrade water quality of both streams will have negative effect in Kwan-Do wetland conservation.

並列關鍵字

Factor analysis ； Wetland ； Heavy metals

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