摘要
为了完善倍斜率聚类法在内陆江河领域水环境质量评价中的应用,在无纲量化水质污染国家分级标准和水环境因子实测结果的基础上,根据《2001~2011年湖南湘潭市环境质量报告书》的监测数据,主要针对高锰酸钾指数(CODMON)、五日生化需氧量(BOD5)、氨氮(NH3-N)、挥发酚、氰化物(CN)、镉(Cd)、砷(As)、汞(Hg)、六价铬(Cr)、铅(Pb)、锌(Zn)、铜(Cu)等12项污染因子进行湘江湘潭段马家河、五星和易家湾等3个断面水质的倍斜率聚类分析.通过对比2001~2011年各断面水质监测结果和评价结果发现:挥发酚、CN,Cr,Hg和Pb等指标的年际变化趋势不明显,CODMON,NH3-N,BOD5,Cu等指标含量的年际变化趋势为上升,Cd,As,Zn等指标含量的年际变化趋势为下降;2007年及其以后年份水质好转,特别是2007年和2008年水质污染处于近10多年的最好水平,2009~2011年水质污染程度较2007年和2008年有所加剧,但总体较2001年前后有所好转;从3个断面的比较来看,处于湘江湘潭段上游的马家河断面较五星断面和易家湾断面污染严重.
In order to investigate the application of the twice-slope clustering method in assessing the water environmental quality in the field of inland river, according to the monitoring data of the 2001-2011 environmental quality report of the Xiangtan City in Hunan Province,this paper carries on the twice-slope clustering method of the water environmental quality in three sections,i. e. Majiahe,Wuxing and Yijiawan,mainly aimed at the 12 pollution factors,e.g.,CODMON,BOD5,NH3– N,volatile phenol,CN,Cd,As,Hg,hexavalent chromium,Pb,Zn and Cu,based on the nondimensionalization of the monitoring results of water environment and the pollution classification standard. The comparison of the monitoring and evaluation results of the three sampling sections from 2001 to 2011 shown that the following findings： the annual variation trend of the indexes（ e.g.,volatile phenol,CN,Cr,Hg and Pb） is not obvious,the CODMON,NH3-N,BOD5 and Cu have increased,while the Cd,As and Zn have been decreased; in 2007 and the subsequent years,the water quality was improved,especially in 2007 and 2008 the water quality was the best in the past 10 years,the water pollution from 2009 to 2011 was more serious than 2007 and 2008,but overall it was better than 2001; the comparison of three sections shows that the water pollution of the Majiahe section,which is located in the upstream of the Xiangjiang Rriver in Xiangtan City,is more serious than Wuxing section and Yijiawan section.
作者
宋焱
刘贤赵
张勇
李振国
廖秀英
Song Yan;Liu Xianzhao;Zhang Yong;Li Zhenguo;Liao Xiuying(School of Resource,Environmental and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《矿业工程研究》
2018年第1期68-74,共7页
Mineral Engineering Research
基金
国家自然科学基金资助项目(41271060)
博士启动基金资助项目(E56124)
湖南省教育厅科研资助项目(17C0631)
湖南省自然科学基金项目(2018JJ3157)
关键词
湘江湘潭段
水质
马家河
五星
易家湾
倍斜率聚类法
Xiangjiang River in Xiangtan City
water environmental quality
Majiahe
Wuxing
Yijiawan
twice-slope clustering method
