基于组合权物元分析模型的地下水水质评价

针对以往地下水水质评价中多采用单一权重法确定各评价指标权重的不足,提出基于主客观组合权重的权重计算模式,并运用权重风险度计算公式选出相对合适的组合权重,再与物元分析理念相结合,构建用于评价地下水水质的组合权物元分析模型。应用该模型对阜新新邱露天煤矿排土场淋溶水的地下水污染区的12个监测点水质进行综合评价。结果表明:研究区的1#～5#监测点水质均达到Ⅱ级以上,符合国家饮用水标准要求;6#～12#监测点水质均受到不同程度的污染,已不能饮用。评价结论与灰色关联分析法和模糊综合评价法所得结论基本一致。

Groundwater quality evaluation of matter-element model based on the combined weights

The present paper is inclined to introduce a matter-element model for the groundwater quality evaluation based on the combined weights.Taking the disadvantages of using single weights for assessment of groundwater quality in the previous studies,we have developed the variable pattern recognition model based on the integration of the subjective and objective weights.In proceeding with our research,we have chosen the calculation formula of the weight risk degree and the more suitable combination weights,which can help to increase the reliability of the combination weight.And,then,we have established matter-element model based on the matter-element analysis and the combined weights for evaluating the groundwater quality because the model can not only take into full account the drawbacks of the single weights but also helps to reduce the error of inconsistency of combination of the subjective and objective weights.With the above said advantages,the model has already been applied successfully to evaluating twelve wells for the groundwater quality around the open-pit coal mine of Xinqiu in Fuxin.According to the monitoring indexes of the groundwater pollution area,we have chosen seven indexes as our evaluation factors.The results of our evaluation show that all the water samples taken from the wells—from the first one to the fifth one were rated as levelⅡ,which come all to the quality standard of potable water.And,then,the samples chosen from No.6 to No.12 were polluted in different degrees,belonging to level Ⅳand Ⅴ respectively,which are not fit for drinking.The above research has thus helped us to conclude that the above said method helps to join the grey associated analysis and fuzzy comprehensive appraisal together successfully though tiny appraisal result differences are likely to be caused.On the whole,the assessment results are in conformity with the objective facts.Being highly convenient,objective as well as rationalistic, the model proposed by us can be taken as an effective up-to-date analysis means for groundwater quality assessment.