烟台四十里湾海水养殖水域环境污染研究

根据烟台四十里湾海水增养殖区8个监测点的水质调查结果,分析水中化学需氧量(COD)、溶解性无机氮(DIN)、总氮(TN)、活性磷酸盐(PO4-P)和总磷(TP)浓度的季节变化,估算了贝类养殖的排泄物对海水污染的贡献率;采用营养指数法和有机污染指数法进行了水质分析评价。结果表明:夏季各化学指标的浓度明显高于春季,COD、DIN和PO4-P浓度与往年同期相比有明显升高;TN和TP浓度超过海水水质二类标准值,TN值最高超标140%;整个海湾夏季富营养程度比较严重,平均E值为3.58,有机污染指数平均值为3.40,有机污染程度达到4级,属中度有机污染。

Research on Seawater Environment Pollution of the Mariculture in Yantai Sishili Bay

Based on the water quality investigation results of eight monitoring stations in the mariculture region of Sishili Bay,the seasonal changes in the concentrations of chemical oxygen demand(COD),dissolved inorganic nitrogen(DIN),total nitrogen(TN),active phosphate(PO4-P) and total phosphorus(TP) were analyzed,the pollution contribution rate from marine aquaculture was estimated.Organic pollution index and eutrophication index had been used to assess the water quality.The results showed that the concentration of chemical index was significantly higher in summer than that in spring.In comparison with the previous years,the contents of COD,DIN and PO4-P increased obviously.TN and TP concentrations exceeded the second-rate seawater standard,and TN concentration overweighed the highest of 140%.The average eutrophication index in the bay in summer was 3.58 and the eutrophication was much more serious in summer than that in spring.The average organic pollution index in the overall study area was 3.40 and organic pollution levels reached the level 4,which was moderately polluted.