龙岛邻近海域水质状况调查与评价

依据2016年6月、11月对龙岛邻近海域表层海水的水质要素（包括温度、盐度、pH、溶解氧（DO）、化学需氧量（COD）、亚硝酸盐（NO₂-N）、硝酸盐（NO₃-N）、铵氮（NH₄-N）、活性磷酸盐（PO₄-P）、硅酸盐、铜、铅、锌、镉、总铬、汞、砷和油类等）两个航次的调查数据，对龙岛邻近海域水质状况进行了评价。结果显示，该海域表层海水中各污染要素质量浓度大致呈现由龙岛向西南递增，向东南递减的趋势，且无机氮是主要的污染物。营养化评价模式和有机污染指数计算结果显示该海域表层海水总体营养水平较高，处于磷限制的潜在性富营养水平，有机污染程度较轻，水质状况良好。

Survey and assessment of seawater quality in Long island adjacent waters

The survey of surface seawater quality in Long island adjacent waters was conducted in June and November, 2016.Hydrochemistry elements including temperature, pH, salt degree, DO, COD, NH₄-N, NO₂-N, NO₃-N, PO₄-P, Cr, Cu, Zn, As, Cd, Hg, Pb and oils were surveyed.The results show that the concentration of pollutants in the surface seawater of the sea area generally decreases from the Long island to the southwestern waters, decreasing to the southeastern waters, and the concentration of inorganic nitrogen is main pollutants.The results of nutrient evaluation model and organic pollution index show that the overall nutrient level of surface seawater in this area is high, the potential eutrophication level is limited, the degree of organic pollution is small and the water quality is good.