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根据大连金普湾水质调查数据,分析了表层海水无机氮和活性磷酸盐含量变化及其时空分布特征,并对该海域表层水体的富营养化状况进行了评价。调查结果表明,金普湾海域在大、小潮期表层海水无机氮含量在50%以上的站位达到一类海水水质标准;35%以上的站位超过四类海水水质标准,这些站位基本集中在普兰店湾内。活性磷酸盐含量在85%以上的站位达到一类海水水质标准,其余站位均能达到二、三类海水水质标准。金普湾海域无机氮含量分布呈现东北部区域含量高,往西南方向逐渐递减;活性磷酸盐呈普兰店湾、金州湾附近海域,西南部近岸海域含量较高,并逐渐向外部扩散。普兰店湾湾口处无机氮和活性磷酸盐含量受潮汐变化的影响较大。金普湾海域以普兰店湾表层海水水质富营养化程度最为严重,由北向南至湾口处富营养化程度逐渐减轻,普兰店湾外部海域富营养化指数(E)小于1,未呈现富营养化状态。
According to the survey data of water quality in Kinpu Bay of Dalian, the changes of inorganic nitrogen and active phosphate content in surface seawater and their temporal and spatial distribution were analyzed. The eutrophication status of surface waters in this area was also evaluated. The survey results show that the seawater quality standards of Jinpu Bay reach a class of seawater quality standards in stations where the inorganic nitrogen content of surface seawater is above 50% during the large and small tidal periods. Over 35% of the stations exceed the four types of seawater quality standards, and these stations are basically concentrated In Pulandian Bay. Active phosphate content of more than 85% of stations to reach a class of seawater quality standards, the remaining stations are able to meet the second and third class of seawater quality standards. The content of inorganic nitrogen in the Kinpu Bay area showed a high content in the northeast and a gradual decrease in the southwest. Active phosphates were higher in the Pulandian Bay and Jinzhou Bay waters and in the southwestern coastal waters, and gradually spread to the outside. The contents of inorganic nitrogen and active phosphate in Pulandian Bay Bay are more affected by tidal changes. The surface water quality of Pulandian Bay is the most serious in the area of Ki Pu Bay. The eutrophication degree gradually decreases from north to south to the mouth of the bay. The eutrophication index (E) of the outer Pulandian Bay is less than 1, and no eutrophication State of affairs