同安湾海域近十年水环境质量状况分析与评价研究

根据2002年-2011年同安湾海域水质监测结果,采用单因子污染指数评价法和富营养化水平法对同安湾海域近十年水质状况进行分析与评价。结果表明,该海域主要污染因子为无机氮和活性磷酸盐,各年均值大部分超三类海水水质标准;溶解氧、化学需氧量、重金属(汞、铜、铅、镉)及砷、油类均符合一类海水水质标准。该海域目前处于N高P低的富营养状态,氮磷比趋势不够稳定,但磷限制性富营养化趋势有所下降。

Analysis and Evaluation on Water Quality of Tong'an Bay in Recent Decade

This paper analyzes and evaluates the water quality of Tong＇an Bay in recent ten years, using single pollutant factor and eutrophication level method separately based on the monitoring data from 2002 to 2011. It concludes that the major pollution factor in Tong＇an Bay are DIN and phosphate, most of the average annual content of DIN and phosphate exceed the category m of Sea Water Quality Standard. While DO, COD, heavy metal and oil accord with category I of Sea Water Quality Standard. Tong＇an Bay is now in the status of high nitrogen and low phosphate and the N/P ratio is unstable, but the trend of eutrophication in phosphate -limited declines.