清?河许昌段水质改善效果及驱动因素分析
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摘要
通过分析清潩河许昌段5个断面2013—2016年水质类别及COD、氨氮的变化情况,评估《清潩河流域水环境综合整治行动计划》实施前(2011年)、后(2016年)的水质改善效果,并识别水质改善的驱动因素。结果表明:水质类别由2011年的《地表水环境质量标准》(GB 3838—2002)中劣Ⅴ类提升至2016年达到或优于Ⅴ类,其中5个断面平均COD年均值由2011年的49mg/L降至2016年的23mg/L,平均氨氮年均值由2011年的6.1mg/L降至2016年的0.5mg/L;外源排放量降低、内源污染负荷削减与修复、流域水生态系统构建及水资源调度加强是水质显著改善的主要驱动因素。
According to the variation trend of water quality categories and the concentration of COD and ammonia nitrogen in Xuchang Section of Qingyi River during 2013-2016,the improvement of water quality before(2011)and after(2016)"Environment comprehensive improvement action plan of Qingyi River"had been evaluated,and the driving factors were recognized.The results indicated that all water quality indices had improved,which achieved or surpassed ClassⅤ of"Environment quality standards for surface water"(GB 3838-2002)in 2016 from previously worse than ClassⅤin 2011.The annual average COD reduced from 49 mg/L to 23 mg/L and ammonia nitrogen decreased from 6.1 mg/L to 0.5 mg/L.The reduction in exogenous contamination discharge,the reduction and remediation of endogenous pollutant load,the building of basin water ecosystem and the reinforcement of water resources reallocation were important reasons for the significant improvement of water quality.
According to the variation trend of water quality categories and the concentration of COD and ammonia nitrogen in Xuchang Section of Qingyi River during 2013-2016,the improvement of water quality before(2011)and after(2016)"Environment comprehensive improvement action plan of Qingyi River"had been evaluated,and the driving factors were recognized.The results indicated that all water quality indices had improved,which achieved or surpassed ClassⅤ of"Environment quality standards for surface water"(GB 3838-2002)in 2016 from previously worse than ClassⅤin 2011.The annual average COD reduced from 49 mg/L to 23 mg/L and ammonia nitrogen decreased from 6.1 mg/L to 0.5 mg/L.The reduction in exogenous contamination discharge,the reduction and remediation of endogenous pollutant load,the building of basin water ecosystem and the reinforcement of water resources reallocation were important reasons for the significant improvement of water quality.
引文
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[6]王秀朵.北方缺水城市景观水体污染控制[J].给水排水,2011,47(7):1-3,46.
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[8]昌盛,刘琰,付青,等.清潩河流域许昌段水污染成因分析与整治对策[J].环境工程技术学报,2015,5(6):471-477.
[9]王梅,刘琰,郑丙辉,等.城市内河表层沉积物氮形态及影响因素---以许昌清潩河为例[J].中国环境科学,2014,34(3):720-726.
[10]WANG Q,ZHANG Q H,WU Y,et al.Physicochemical conditions and properties of particles in urban runoff and rivers:implications for runoff pollution[J].Chemosphere,2017,173:318-325.
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[14]张航,冯民权,王莉,等.基于生态调水清潩河水环境效应研究[J].西安理工大学学报,2015,31(2):83-90.
[15]YANG X Y,LIU Q,FU G T,et al.Spatiotemporal patterns and source attribution of nitrogen load in a river basin with complex pollution sources[J].Water Research,2016,94:187-199.
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[18]ZHANG M M,WANG S,FU B J,et al.Ecological effects and potential risks of the water diversion project in the Heihe River Basin[J].Science of the Total Environment,2018,619/620:794-803.