傅千育－台北市中心雨水水質特性之研究
A Study of Rain Water Quality in Downtown Taipei
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都會地區空氣污染日益嚴重，並且大氣中各項污染物可經由沈降之方式轉換型態，對水體造成衝擊。本研究於台北市中心採集雨水樣品，探討雨水水質特性，分析採樣高程對所採雨水水質之影響；並且近年來雨水水質採樣多以自動採樣器進行採樣分析，本研究亦比較以自動採樣器採樣與以 PE 盆採樣所得雨水樣品水質之差異，以供濕沈降研究規劃採樣策略之參考。

統計檢定分析結果顯示採樣高程對以 PE 盆採樣與水樣品中 pH 值、鹼度、懸浮固體、氯離子、總有機碳與非氣提性有機碳濃度有顯著之影響；但採樣高程僅對雨水自動採樣器採樣之雨水樣品之 pH 值與懸浮固體有顯著之影響。此因雨水自動採樣器無法採集降雨初期之雨水，而使其統計結果與 PE 盆採樣雨水不同。此部分值得繼續加以探討，針對雨水在不同高程之水質特性加以研究，以明瞭降雨對空氣中污染物傳輸行為之影響。就兩種採樣方式之綜合比較，以 PE 盆採樣方式之雨水中污染物濃度較高，此因雨水自動採樣器無法收集降雨初期污染物濃度較高之雨水，因而低估雨水中污染物之濃度。綜合而言，雨水採樣之結果受到採樣地點、採樣高程、採樣方法影響極大，類似研究應將此列入考慮，詳細規劃採樣策略。

Rainwater samples in downtown Taipei were collected and major constituents were analyzed. A rainwater autosampler and an open PE box were setup on ground floor and the roof of a 70 meter high building to collected water samples. The results showed that the pH, alkalinity, total organic carbon, sulfate, nitrate, and suspended solids in rainwater showed right skewed distributions in this study. A major difference in the concentrations of the pollutants in rainwater collected from the roof and the ground level was observed when the PE box was used, however, no apparent difference was found in rainwater collected from the autosampler.