两种方法对泰莱盆地河流水质评价的分析

采用加权欧式距离法和模糊综合评价法对泰莱盆地地表水体环境质量进行评价的结果表明,全区地表水以Ⅱ和Ⅲ类为主;东部河流水质稍差,牟汶河和柴汶河的上游水质超过Ⅳ类;西部的大汶河和汇河水质要好于东部地区河流,水质以Ⅱ类和Ⅲ类为主。加权欧式距离法在给出评价断面水质级别的同时给出评价断面对于某一水质标准的贴近度以及水质的变化趋势,评价结果显示的信息相对真实多元,在水质评价中的表现要优于模糊综合评价法。

Analysis of Two Methods for River Water Quality Evaluation in Tailai Basin

The surface water environmental quality in Tailai Basin is evaluated by weighted Euclidean distance method and fuzzy comprehensive evaluation method respectively. The results show that, (a) the surface water quality in the whole basin is mainly of Class Ⅱ and Ⅲ;(b) the water quality of the eastern rivers is slightly worse,and the water quality of the upper reaches of Mowen and Chaiwen rivers is worse than Class Ⅳ;and (c) the water quality of Dawen and Huihe rivers in the western area of basin is mainly of Class Ⅱ and Ⅲ,which is better than that of the rivers in the east. The weighted Euclidean distance method can not only give the water quality level of evaluated sections,but also give the closeness of evaluated sections to a certain water quality standard and the change trend of water quality,which makes the evaluation results more true and diverse,so the weighted Euclidean distance method is better than fuzzy comprehensive evaluation method in water quality evaluation.