环渤海河流COD入海通量及其对渤海海域COD总量的贡献

发布时间：2017-12-31 10:02

本文关键词：环渤海河流COD入海通量及其对渤海海域COD总量的贡献　出处：《中国环境科学》2016年06期 　论文类型：期刊论文

【摘要】：于2013年8月~2014年10月,分季节对环渤海36条入海河流进行了4次调查采样,核算其COD入海通量,并评估其对渤海水质的影响.结果表明,大部分河流都受到了严重污染(COD为地表IV类),但污染最重的河流并不是COD入海通量最大的河流,COD的最大值和COD入海通量的最大值不具有一致性;环渤海河流排入渤海的CODCr的年入海通量最大(606万t),其次是酸性COD_(Mn)的入海通量(62万t),碱性COD_(Mn)最小,为53万t;环渤海河流在丰水期COD的入海通量约占全年的68%,其次是平水期(28%),枯水期最小(4%);整个渤海海域的碱性COD_(Mn)总量为239万t,其中环渤海河流输入约占25%.
[Abstract]:From August 2013 to October 2014, the COD fluxes of 36 rivers entering the Bohai Sea were investigated and sampled from August 2013 to October 2014. The results show that most rivers are seriously polluted by COD, but the most polluted rivers are not the ones with the largest COD flux into the sea. The maximum value of COD and the maximum flux of COD into the sea are not consistent. The annual throughput of CODCr discharged from the Bohai Rivers into the Bohai Sea is the largest (6.06 million t / t), followed by the flux of the acidic CODP-MN (620,000 t / t) and the minimum of alkaline COD / MN. 530,000 t; The COD flux of the Bohai Rivers in the high water season accounts for 68% of the whole year, followed by 28% in the normal water period, and 4% in the dry season. The total amount of alkaline COD- Mn-MN in the whole Bohai Sea is 2.39 million t, and the input of the Central Bohai River accounts for about 25%.
【作者单位】：中国海洋大学环境科学与工程学院;中国科学院烟台海岸带研究所山东省海岸带环境工程技术研究中心;
【基金】：国家自然科学基金项目(41373100)
【分类号】：X55;X52
【正文快照】： 化学需氧量(COD)通常用来指示水体受污染程度,是实施排放总量控制的重要指标.测定COD时一般依据所用氧化剂的不同,分为铬法COD(CODCr)和锰法COD(CODMn),其中CODMn又可根据分析方法划分为酸性和碱性2类[1].河流径流输入是海洋污染物的重要来源之一,因此入海河流的水质状况日益

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