模糊意见集中决策法在土壤重金属污染评价中的应用

Application of the Method of Fuzzy Comments and Focused Decisions in the Assessment of Soil Heavy Metal Pollution

应用模糊意见集中决策法对某地区土壤重金属污染进行了评价。首先,应用模糊意见集中决策法,根据土壤中重金属的含量进行排序,得出各评价因子Borda数,然后针对各评价因子的毒性,应用层次分析法确定各评价因子的权重,最后按加权Borda数大小排序,依次对土壤环境优劣进行评价。采用基于评价因子含量及毒性的模糊意见集中决策法,方法科学,运算简便易行,准确率高,能克服一些传统评价方法中出现误判的情况,分辨率好,评价结果更科学,更能如实反应出土壤重金属实际污染状况。

In this paper, the method of fuzzy comments and focused decisions was used to assess the regional soil environmental quality. Firstly, using the method of fuzzy comments and focused decision, the assessment factors Borda's values were obtained according to the concentrations of heavy metals. Then, using the method of analytical hierarchy process(AHP), the weights of assessment factors were determined according to the poisons of heavy metals.Finally, the soil environment quality was evaluated based on the ranks of weighted Borda's values. Due to the reasonable assessment factors containing concentration and poison, the mathematical model based on the method of fuzzy comments and focused decision was feasible and scientific. Moreover, this method could increase the distinguishability of results, and avoid some error making in other assessment methods, and scientifically and factually reflect the actual status of the heavy metal pollution in soil.