2002-01-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/671884摘要：新竹香山海域牡蠣呈嚴重重金屬污染, 本研究之主要目的在調查分析其在2002年內其牡蠣重金屬污染現況, 程度與範圍, 並與歷年分析結果比對並期能了解改善與否與程度。研究結果顯示新竹香山海域牡犡重金屬濃度仍為台灣海域重金屬含量最高之區域，牡犡重金屬污染現象在本年度之觀察研究結果顯示仍持續存在，顯示陸源重金屬污染物仍持續向本海域排放，造成此區域養殖重金屬持續的呈嚴重污染。 新竹香山海域牡犡重金屬污染現象在本年度呈現三種變化，（１）季節雖呈明顯變化，但最高濃度出現季節已從冬季改為目前之春季, 且似乎逐漸向夏季趨近；（２）區域上雖仍以北部為最高濃度出現之地區，但養殖區域南端亦開始出現高值；（３）冬季總體濃度已較去年降低約25%。 季節性最高值之自冬轉至春季，似不與新竹地區自然現象如季風、雨量、河川流量改變有關，故可能與該區域工業產量改變有關；區域性南部出現高值顯示新竹南部河川可能開始有較嚴重之重金屬排放所導致，宜更加強新竹地區重金屬污染管制，避免牡犡養殖污染之更加惡化。此區域養殖牡犡今年重金屬呈下降之趨勢，可能與該區域今年來產業界景氣不佳有關。 新竹區域養殖牡蠣持續呈嚴重污染，環境主管機關行政效率實有嚴重缺失。 <br> Abstract: Oysters in the HsienChu area were heavily polluted with heavy metals in the earlier studies. Major objectives of this study are to investigate the degree and extent of oyster heavy metal pollution, and to understand their variations and improvement throughout the year. The result showed that oysters from the HsienChu area remained severely heavy metal polluted and were the highest among all the oysters produced in the entire western coast of Taiwan. Highest heavy metal concentrations occurred in the spring season instead of the winter in the previous years. The highest concentrations found in the oyster remained in the northern study area, however, a group of oyster with relatively high concentrations of heavy metals is appearing in the southern tip of the study area. Heavy metal concentrations during the winter season were about 25% lower than the previous year. This lowering of heavy metal concentrations appeared to be related with the economic downturn which may have lower the industrial production in the area. A possible lowering in the production waste subsequently would have lowered its waste draining into the area where oyster were cultivated.