摘要
基于2011年秋季钦州湾东部近岸海域的水质调查数据,利用单因子标准指数法及模糊综合评价模式对钦州湾东部近岸海域海水水质现状进行综合评价。结果表明:钦州湾东部近岸海域秋季海水中DO,COD,BOD5,PO4-P,DIN,石油类,Cu,Pb,Zn,Cd,Cr,As,Hg的平均浓度分别为:6.34 mg/L,1.10 mg/L,0.74 mg/L,0.02 mg/L,0.26 mg/L,0.023 mg/L,2.2μg/L,1.1μg/L,4μg/L,0.14μg/L,0.2μg/L,0.68μg/L,0.036μg/L。该海域海水中DO,COD,BOD5,石油类,Cu,Pb,Zn,Cd,Cr,As,Hg的平均浓度均符合国家一类海水水质标准,PO4-P和DIN的平均浓度超出了一类海水水质标准。以单因子标准指数法进行评价,钦州湾东部近岸海域水质级别为II级。以模糊综合评价模式进行评价,钦州湾东部近岸海域水质级别为I级。PO4-P和DIN是钦州湾东部近岸海域秋季海水中的主要污染物。
Based on the survey data of the seawater quality of the coastal waters of the eastern Qinzhou Bay in the autumn of 2011, the seawater quality is comprehensively assessed by the single factor standard index method and fuzzy comprehensive evaluation model. The results show that the concentration of DO, COD, BOD5, PO4-P, DIN, petroleum, Cu, Pb, Zn, Cd, Cr, As and Hg in seawater averages 6.34 mg/L, 1.10 mg/L, 0.74 mg/L, 0.02 mg/L, 0.26 mg/L, 0.023 mg/L, 2.2 μg/L, 1.1 μg/L, 4 μg/L, 0.14 μg/L, 0.2 μg/L, 0.68 μg/L and 0.036 μg/L, respectively. Only the mean concentrations of PO4-P and DIN exceed the National Se awate r Quality Standard of the first category. Assessing by the single factor standard index method and fuzzy comprehensive evaluation model, the seawater quality of the eastern Qinzhou Bay is classified as II and I level, respectively. Therefore, the main pollutants in the eastern Qinzhou Bay in autumn are PO4-P and DIN.
出处
《海洋技术》
2015年第2期83-89,共7页
Ocean Technology
基金
广西近海海洋环境科学重点实验室开放基金资助项目(GXKLHY14-03)
广西自然科学基金北部湾重大专项资助项目(2012GXNSFEA053001
2011GXNSFE018002)
关键词
钦州湾
水质
模糊综合评价
Qinzhou Bay
water quality
fuzzy comprehensive evaluation
