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Eutrophication, health risk assessment and spatial analysis of water quality in Gucheng Lake, China

机译:故城湖的富营养化,健康风险评估和水质空间分析

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The water characteristics of the Gucheng Lake, such as eutrophication, health and spatial distribution, were investigated. On the basis of the trophic state index (TSI) and entropy weight, a synthesized trophic state index (STSI) model was established to assess lake eutrophication condition through calculating STSI, choosing TP, TN, COD, BOD and NH3-N as trophic variables. The STSI ranged from 50.58 to 62.44, which showed that the water has been between eutrophic and supereutrophic. A histogram was applied to health risk assessment which was analyzed from carcinogenic substances (Cr+6, As and Cd) and non-carcinogenic substances (hydroxybenzene, Pb, Hg, CN− and NH3), and the results showed that the former was much greater than the latter for effect. The total risk for each resident caused by all pollutants ranged from 5.18E-05 to 8.34E-05, which is far higher than the standard, recommended by Sweden Bureau of Environment Protection and Holland Ministry of Building and Environment Protection (1.0E-05). Cluster analysis was used to detect similarities and dissimilarities among the seven sampling sites and explain the observed clustering in terms of affected conditions. Twenty-one variables were used to divide seven sampling sites into three groups, namely, north lake, south lake and lake center. Keywords Gucheng Lake - Lake eutrophication - Entropy weight - Trophic state index - Health risk assessment - Cluster analysis - China
机译:研究了古城湖的水质特征,如富营养化,健康状况和空间分布。在营养状态指数(TSI)和熵权的基础上,建立了一个综合营养状态指数(STSI)模型,通过计算STSI,选择TP,TN,COD,BOD和NH 3 <来评估湖泊富营养化状况。 / sub> -N作为营养变量。 STSI的范围是50.58至62.44,这表明水一直处于富营养和超富营养之间。将直方图应用于健康风险评估,从致癌物质(Cr +6 ,As和Cd)和非致癌物质(羟基苯,Pb,Hg,CN -和NH 3 ),结果表明前者的效果远大于后者。每位居民由所有污染物引起的总风险范围为5.18E-05至8.34E-05,远远高于瑞典环境保护局和荷兰建筑与环境保护部建议的标准(1.0E-05 )。聚类分析用于检测七个采样点之间的异同,并根据受影响的条件解释观察到的聚类。使用二十一个变量将七个采样点分为三个组,即北湖,南湖和湖中心。关键词古城湖-富营养化湖-熵权-营养状态指数-健康风险评估-聚类分析-中国

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