地下水质量综合评价方法的对比分析及应用

为了对北京市某地区丰水期的12例地下水水样进行水质评价,分别介绍了F值法、内梅罗指数法、模糊综合评价法和物元可拓法的原理,并编写MATLAB程序计算得出评价结果,同时对4种方法的评价结果进行对比分析。分析结果表明:F值法突出最大污染因素,评价结果偏大;修正的内梅罗指数法虽然降低了最大污染因素的影响,但不能精确得出结果;模糊综合评价法和物元可拓法的评价结果基本一致,但物元可拓法可以根据可拓指数判断水质变化的趋势。经过对4种方法的分析比较,可以为实际工程中合理选择地下水评价方案提供一定的技术指导。

Comparative analysis and application of groundwater quality comprehensive evaluation methods

In order to evaluate the groundwater quality of 12 cases from wet season in certain district of Beijing City,the principle of F-value method,modified Nemero index method,fuzzy comprehensive evaluation method and matter element extension method are introduced,and MATLAB program is compiled to calculate the evaluation results,and the evaluation results of the four methods are compared and analyzed.Analysis results show that:the F-value method highlights the maximum pollution factor,so the evaluation result is too large;the Nemero index method can reduce the influence of maximum pollution factors,but the results can't be calculated precisely;evaluation results of the fuzzy comprehensive evaluation method and matter element extension method are basically the same,but the matter element extension method based on extension index can judge the trend of water quality change.The analysis and comparison of the four methods can provide a technical guidance for the groundwater evaluation scheme in practical engineering.