基于TOPSIS法的土壤重金属污染评价分析

污染评价可以确定土壤质量状况并为污染治理等工作提供科学依据。以南京玄武区藤子村表层土壤中6种重金属元素为评价因子,分别采用主成分分析法、相关系数法以及灰色关联度法定权,通过区分度比较了评价结果的稳定性,并选择较可靠的结果进行空间插值生成污染情况专题图。评价结果表明:采用GRA-TOPSIS法的评价结果更可靠,得到的土壤污染情况与实际相符; 在土壤重金属污染评价中,TOPSIS法有较高的适用性。

Analysis of soil heavy metal pollution assessment based on TOPSIS

The pollution assessment which can determine the quality of the soil provides reliable scientific evidence for pollution treatment. We took six kinds of heavy metal elements got from the soil of Tengzi Village, Xuanwu District, Nanjing City as evaluation factors. We used the principal component analysis, correlation coefficient analysis and grey relational analysis to make the determination. The stability of the evaluation results was compared by discrimination. Then we choose the more reliable result to carry on the spatial interpolation to produce the pollution situation thematic map. The results of the evaluation showed that the results based on GRA-TOPSIS were more reliable and the soil pollution was consistent with the actual situation. TOPSIS had a higher applicability in pollution assessment of soil heavy metal.