| 摘要: |
| 于2002年8月10～18日和2003年8月12～28日对渤海海区进行了海水水质调查。结果表明,调查海域化学耗氧量(COD)平均浓度分别为0.70 mg/L±0.21 mg/L和0.63 mg/L±0.18 mg/L,其中相对高值区(>1 mg/L)主要分布在辽东湾北部,莱州湾南部和中央海区西北部海域,而相对低值区(<0.6 mg/L)主要分布在中央海区东南部。分析表明,调查海域COD浓度不仅远远低于国家一类海水水质标准,而且也大大低于渤海沿岸水。进一步分析表明,COD对于调查海域富营养化的贡献仅为1/4左右,这一结果证明了造成渤海海区富营养化的化学污染物不是COD。 |
| 关键词: 渤海 COD 富营养化 贡献 |
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| 基金项目:国家自然科学基金(40136020,40376033);国家教育部博士点基金资助项目(20020423006) |
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| Spatial distribution of COD and its contribution to the eutrophication in Bohai Sea |
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| Abstract: |
| Two cruises for water quality examination have been carried out in Bohai Sea, China from Aug. 10th to 18th 2002 and from aug. 12th to 28th 2003. In the study area, the average concentrations of chemical oxygen demand (COD) were 0.70 mg/L ± 0.21 mg/L and 0.63 mg/L ± 0.18 mg/L in the summer of 2002 and 2003, respectively. The value highs were in Laizhou Bay and the northwest of the occourred area; while the values lows (<0.6 mg/L) mainly occourred at the southeast of the area. In the whole survey area, the COD concentration could not only meet the standard for first-class seawater quality, but also was significantly lower than the COD concentration of the coastal water. In the research area, the COD contribution to the eutrophication accounted for only one-fourth of the total, and it was confirmed that COD was not the primary chemical contamination causing eutrophication in Bohai Sea. |
| Key words: Bohai Sea COD eutrophication contribution |
