基于物元可拓法和偏好熵权的饮用水源水质评价——以天津市大港区为例

文章根据天津市饮用水受氟化物影响较大的现实情况,以物元可拓法为基本方法,利用偏好熵设置权重,一方面在无偏好情况下客观地确定各指标的权重进行水质评价,另一方面重点考虑了氟化物对水质的影响再进行评价,分析水质评价结果对氟化物的敏感程度。结果表明,在无偏好情况下,文章涉及的两个饮用水源地的水质较好,多为Ⅰ类水和Ⅱ类水;而在对氟化物偏好设置的情况下,2005～2006年初的水质评价结果偏差,说明此阶段水质评价结果对氟化物比较敏感,而后至2007年末则并未表现出此特征。

Water Quality Evaluation of Drinking Water Sources Based on Matter-element Extension and Partial Entropy Weight——A Case Study of Dagang, Tianjin

According to the fact that the drinking water of Tianjin is significantly impacted by fluorides,this paper evaluate the water quality of two drinking water sources using the partial entropy weight to analyze the fluorides influence,while it evaluate the water quality objectively based on the matter-element extension method.The integrated method can not only figure out the evaluation of water quality but also show their sensitivity to the fluorides.Results show that the water quality of the two drinking water sources are well under no preference,and most of the samples are considered to be Grade Ⅰ and Ⅱ.However,with the preference of the fluorides,the evaluation results are worse than the former condition,for many samples fall under the Grade Ⅲ.And this performance is prominent during 2005 to the beginning of 2006,showing a strong sensitivity to the fluorides for the evaluation results.Then to the end of 2007,it’s no longer outstanding.