Comprehensive evaluation of soil heavy metal pollution in mine based on the analysis of three-dimensional distribution characteristics | 基于三维空间分布特征分析的矿区土壤重金属污染的综合评价
2013
Zhao Xin, Jilin Agricultural University, Changchun (China), College of Information and Technology | Zhu Yongjuan, Changchun Municipal Environmental Monitioring Center, Changchun (China)
chinois. 在单一污染源的矿区，以土壤中4种重金属的含量为评价对象，选用Maflab为制图工具，分别绘制出4种元素含量的三维图像。在进行土壤重金属污染的综合评价时，为减少主观赋权而引起的偏差，采用熵权系数法，即利用信息论中熵的理论来进行权重的设定，得到各个测试点的综合评价指标，并将这些评价指标值与各等级的评价值进行比较和分析，绘制出三维空间分布图像，以全面反映污染情况，有针对性地采取措施综合治理。
Afficher plus [+] Moins [-]anglais. In recent years, ecologial and environmental problems are increasingly drawing people’s arrention, and soil heavy metal pollution is one of them. In this study, we consider mapping out the three-dimensional images of four elements respectively in mine of single source of pollution by using the content of 4 heavy metals in soil as evaluation object and matlab as charting tool. In comprehensively evaluating soil heavy metal pollution, to reduce subjective weighting deviation, we selected entropy weight coefficient method for evaluation, that is, used the theory of entropy in information theory for the setting of weights, and got comprehensive evaluation indices of each test site. By comparing and analyzing the evaluation index value and the evaluation value of each grade, we drafted a three-dimensional distribution image, which reflected the pollution more comprehensively and facilitated the formulation of comprehensive control measures.
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