Application of Different Composite Index Methods in the Evaluation of Soil Heavy Metal Pollution
In this paper, evaluation of southeastern guizhou province some important tea-producing county soil heavy metal pollution adopts Nemerow Pollution Index, Yao Index and Mixed Weighted Model of three different composite index methods, and compares the suita
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School of Karst Science, Guizhou Normal University, Guiyang 550001, Guizhou, China [email protected],[email protected] 2 The State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province, Guiyang 550001, Guizhou, China Guizhou Provincial Supervision and Testing Center for Agricultural Product Quality Supervision, Guiyang 550001, Guizhou, China
Abstract. In this paper, evaluation of southeastern guizhou province some important tea-producing county soil heavy metal pollution adopts Nemerow Pollution Index, Yao Index and Mixed Weighted Model of three different composite index methods, and compares the suitability of three methods. Nemerow Pollution Index adopts arithmetic mean of subindex to improve the contribution rate of the most polluted elements and undermines the contribution of each partial effect on comprehensive pollution. Yao Index uses the ratio of index of the maximum and arithmetic mean value as weight, and diminishes the status of the serverest pollution index. But it ignored the partial contribution to the effect of comprehensive pollution. Mixed Weighted Model has good sensitivity, and it can better differentiate the degree of soil heavy metal pollution and reflect the real situation of soil environmental quality. According to the calculation results of three different comprehensive index methods, the analysis results of soil heavy metals comprehensive pollution index are obtained by Geographic Information Systems and IDW. Results show that high concentrations of heavy metals in the east and northeast of the study area. Keywords: Comprehensive index method The evaluation of soil heavy metal pollution GIS Comparison and analysis Beidou
1 Introduction As we all know, it would polluted the soil if the content of heavy metal were more than its natural content. And what’s more, if these pollution accumulated for a long time, then it would entered our body through the food chain, caused serious damage to human being health. That is why we said it is very significative to assess the heavy metal pollution to soil [1]. Nowadays there are plenty methods of research about assessment of soil heavy metal pollution. Such as Simple exponential method: Single factor index method, Cumulative index method, Ecological risk coefficient method, etc. And © Springer Nature Singapore Pte Ltd. 2017 H. Yuan et al. (Eds.): GRMSE 2016, Part II, CCIS 699, pp. 43–50, 2017. DOI: 10.1007/978-981-10-3969-0_6
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synthetical index method: Nemerow Index method, Yao comprehensive index method, mixed weighted, Ecological risk comprehensive coefficient, etc. These soil heavy metal pollution evaluation model has been widely used in the research community [2–5]. Different evaluation methods have different application characteristics. the evaluation method is mainly to study the overall pollution condition, but few scholars take a systemic summary and comparison of the evaluation results, and even if ever, those are only a theoretical introduction, lacking of quantitative discusses vari
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