江苏如东紫菜增养殖区水环境质量评价

摘要

文章对2016年江苏省如东紫菜增养殖区的水质监测数据进行了分析评价,并结合2014年和2015年的监测数据,将3年的监测结果进行比较,结果表明:如东紫菜增养殖区的水温、盐度和pH值适合紫菜生长,虽然近3年均有所变化,但仍有利于紫菜养殖;化学需氧量、溶解氧、无机氮、石油类均符合一类海水水质标准,且年际变化较小;重金属含量均符合一类海水水质标准.但石油类、砷含量正逐年增加,海水中活性磷酸盐含量超出一类海水标准,有机污染指数表明水质开始受到污染状态,应引起重视.%Based on the monitoring data of porphyra culture area of Rudong in 2016,this paper carried on a systematical analysis and evaluation.Combined with the monitoring data in 2014 and 2015,the three-year-monitoring results were compared.The results showed that the water tem-perature,salinity and pH of porphyra culture area at Rudong are suitable for the growth of por-phyra,although the data of three years varied,the environment is still good for laver cultivation. The DOC,DO,DIN and petroleum oil reached seawater standard gradeⅠ,and the annual variation was small.The heavy metal contents reached seawater standard gradeⅠ,while the contents of pe-troleum oil and As had shown an increasing tendency.The content of PO4-P exceeded the seawa-ter standard grade Ⅰ,and the organic pollution index showed that the water in porphyra culture area was beginning to be polluted,which should be paid attention to.