东方市利章港近岸海域水质状况分析与评价

Analysis and Evaluation of Seawater Along the Coast of Lizhang Port in Dongfang City

对东方市利章港2017年冬季及2018年夏季的多个水环境因子进行研究分析,分别采用单因子指数评价法、有机污染指数法和富营养化指数法进行数据分析。调查表明,利章港总体水质良好,溶解氧、无机氮、化学需氧量含量符合国家一类海水标准,但是铜和六价铬含量严重超标,仅符合四类海水标准;营养盐中磷的含量在夏季有所上升,只符合四类海水标准;在富营养化方面,全年水体均为贫营养化;在有机污染方面,夏季有机污染较为严重,人们应给予足够重视,以采取措施降低污染程度。

Numerous water environmental factors in Lizhang port, Dongfang city, Hainan in the winter of 2017 and the summer of 2018 were detected. The data was analyzed by the single factor index evaluation method, organic pollution index method and eutrophication index method. The results showed that the overall water quality of Lizhang port was good. The contents of dissolved oxygen, inorganic nitrogen and chemical oxygen demand were in line with the range of the national first-class seawater standard, but the contents of copper and hexavalent chromium exceeded the range of the standard seriously, and only met the fourth-class seawater standard. The content of phosphorus in the nutrient salt increased in summer, which only met the fourth-class seawater standards. The eutrophication level was poor in the whole year. Organic pollution was serious in summer, and hence should be reduced by taking some actions.