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长江流域污染物输出对河口水质的影响

乔飞 孟伟 郑丙辉 雷坤 周刚 李子成

乔飞, 孟伟, 郑丙辉, 雷坤, 周刚, 李子成. 长江流域污染物输出对河口水质的影响[J]. 环境科学研究, 2012, 25(10): 1126-1132.
引用本文: 乔飞, 孟伟, 郑丙辉, 雷坤, 周刚, 李子成. 长江流域污染物输出对河口水质的影响[J]. 环境科学研究, 2012, 25(10): 1126-1132.
QIAO Fei, MENG Wei, ZHENG Bing-hui, LEI Kun, ZHOU Gang, LI Zi-cheng. Influence of Pollutants Exported from the Yangtze River Basin on Water Quality in the Estuary[J]. Research of Environmental Sciences, 2012, 25(10): 1126-1132.
Citation: QIAO Fei, MENG Wei, ZHENG Bing-hui, LEI Kun, ZHOU Gang, LI Zi-cheng. Influence of Pollutants Exported from the Yangtze River Basin on Water Quality in the Estuary[J]. Research of Environmental Sciences, 2012, 25(10): 1126-1132.

长江流域污染物输出对河口水质的影响

基金项目: 国家水体污染控制与治理科技重大专项(2009ZX07526-005);国家环境保护公益性行业科研专项(2008467041)

Influence of Pollutants Exported from the Yangtze River Basin on Water Quality in the Estuary

  • 摘要: 基于EFDC模型建立长江口及邻近海域三维水质模型,模拟2004—2007年不同水期的ρ(CODMn)、ρ(DIN)、ρ(PO43--P)状况,分析水质分布的变化特征,研究流域污染物输出对河口水质分布的影响. 根据GB 3097—1997《海水水质标准》,长江口门以上ρ(CODMn)为Ⅱ类水质,ρ(DIN)、ρ(PO43--P)为劣Ⅳ类,并且有明显的分层现象. 枯水期各指标等值线均向东北方向延伸,丰水期和平水期向东南延伸,丰水期流域污染物输出对河口水质的影响最大,不同类别水体的分布形态和水体面积年际变化不明显. 按不同时期ρ(CODMn)、ρ(DIN)、ρ(PO43--P)分布面积进行统计,长江口ρ(CODMn)、ρ(DIN)、ρ(PO43--P)分布与流域污染物输出之间有显著关系,河口水质分布面积与流域污染物输出之间存在定量的压力-响应关系.ρ(CODMn)、ρ(DIN)、ρ(PO43--P)达Ⅳ类以上水体面积(y)与流域污染物输出通量(x)的关系分别为:yCODMn=2 061.4 ln xCODMn-15 357.0,yDIN=1 386.8 ln xDIN-6 546.1,yPO43--P=2 219.3 ln xPO43--P-6 166.1.

     

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出版历程
  • 收稿日期:  2012-01-31
  • 修回日期:  2012-06-07
  • 刊出日期:  2012-10-25

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