作　　者： ; ; ; ; ; ; ;

机构地区： 湖南大学环境科学与工程学院

出　　处： 《湖南大学学报（自然科学版）》 2010年第9期73-78,共6页

摘　　要： 考虑各水期的浓度差异,提出浓度参数综合评判的概念,建立了基于浓度参数综合评判的水环境健康风险评价模型.运用动态聚类分析法将评价结果进行归类,得出风险管理的优先控制等级.将该方法应用于2007年湘江18个断面的健康风险评价研究中.结果表明:各监测断面中砷、六价铬和镉3种污染因子的健康危害较大,其中砷的健康危害最大;采用动态聚类分析将风险评价结果归为4类即:高风险、高-中风险、中风险和低风险.其中松柏下断面健康风险最高,达到3.79×10-4,属于高风险级别,应进行优先控制;黄茶岭属于高-中风险;归阳镇、熬洲、朱亭镇、枫溪、白石、霞湾、马家河、五星、易家湾、樟树港断面为中风险;另外6个断面为低风险.根据综合评判,大部分断面水质已受到不同程度的污染,须加强湘江水环境污染控制. An integrated assessment model for the concentration parameter was proposed. Because the concentration parameter is variable in different periods of the river, an environmental health risk assessment model was developed on the basis of the integrated assessment model. Dynamic cluster analysis was used to obtain the priority of the risk management. The model was used to assess the health risk of 18 sec- tions of the Xiangjiang River in 2007. The result showed that the health risks from As,Cd and Cr6＋ were very high. By using the dynamic cluster analysis, the health risks were divided into four categories of ＂high＂, ＂high-medium＂,＂medium＂ and ＂low＂. The health risk of the Songboxia section is the highest, which fell into to the ＂high＂ category and needed priority treatment. The health risk of the Huangtuling sector fell into the high-medium category. The Guiyangzhen, Aozhou, Zhutingzhen, Fengxi, Baishi, Xiawan, Majiahe, Wuxing, Yijiawan and Zhangshugang sections belonged to the ＂medium＂ level. And other six sections belonged to ＂low＂ level. With reference to the integrated assessment, most of the sections were more or less polluted. Therefore, the pollution control of the Xiangjiang River must be strengthened.

关 键 词： 不确定性 健康风险评价 动态聚类分析 综合评判

领　　域： [环境科学与工程]