山东威海双岛湾海域营养状态及有机污染状况分析

Analysis of Nutrients and Organic Pollution in the Shuangdao Bay

根据2007年3月双岛湾海域水质监测结果,采用单因子标准指数评价法、营养状态质量指数评价法、营养指数评价法和有机污染评价指数评价法对该海域水质状况进行了评价。结果表明:pH值、DO、COD、无机氮、磷酸盐部分测站超《海水水质标准》(GB3097-1997)中二类水质标准;NQI值在1.01～3.17范围内,平均值为2.18,E值在0.45～12.35范围内,平均值为5.02,呈现明显富营养化;A值的范围为1.15～6.81,平均值为4.05,有机污染相对较严重。总体上该海域已受到严重污染。

According to the data obtained in the Shuangdao Bay in March, 2007, the assessment on the water quality conditions in the Shuangdao Bay was carried out with the single factor standard index, the nutrition condition performance figure, the nutrition index, and the organic pollution appraisal index. The results show that PH, DO, COD, inorganic nitrogen, and phosphate can not satisfy the second water quality standard of ＂Sea water quality Standard＂ （GB3097-1997） at partial stations of sampling. The value of NQI ranges between 1.01 and 3.17 and averages 2.18. The value of E ranges between 0.45 and 12.35 and averages 5.02, and water quality is seriously overnourishous. The value of A ranges between 1.15 and 6.81 and averages 4.05, and organical pollution is to be more serious. In brief, the sea area has been polluted seriously; nutrition and the organic pollution have to be controlled strictly.