摘要
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。
Based on the monitoring result of water quality in the Dalian Jin Pu bay, the content and spatial distribution characteristics of inorganic nitrogen and activated phosphate of surface waters were analyzed. The eutrophication status of surface waters in the area was evaluated. The results showed that the content of DIN in more than 50% monitoring positions achieved the first grade of seawater quality standard, and in more than 35% monitoring positions which focus on Pulandian Bay exceeded the forth grade of seawater quali ty standard in the spring and neap period. The content of activated phosphate in more than 85% monitoring positions achieved the first grade of seawater quality standard and the content in the rest of the positions achieved the second or third grade of seawater quality standard. The content distribution of inorganic nitrogen descended from northeast to southwest in Jinpu Bay. The contents of activated phosphate near Pulandian bay, Jinzhou bay coast and the southwest coast were higher than other areas. The levels of inorganic nitrogen and activated phosphate were greatly influenced by the tides. The sea waters in Pulandian internal bay was a severe eutrophication sta tus. The degree of eutrophication gradually reduced from north to south. Eutrophication index (E) in Pulandian external bay was less than 1. This area was not in the state of eutrophication.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2013年第6期889-892,共4页
Marine Environmental Science
基金
金普湾海域海洋污染过程监测集成与氮磷承载量评估技术应用示范项目(200905007-7)
关键词
无机氮
活性磷酸盐
时空分布
富营养化
DIN
activated phosphate
temporal and spatial distribution
eutrophication