改进内梅罗指数模型在水质评价中的应用探讨

Discussion on application of improved Nemerow index model in water quality evaluation

抽取北海市地下水中23个水样点进行长期监测,分别采用传统的内梅罗指数法和改进的内梅罗指数法进行综合评价,并将两种结果进行对比。结果表明:改进的内梅罗指数模型综合考虑了各个评价指标间的差异性和相对重要性,引进权重因子,弥补了传统的内梅罗指数法充分考虑最大浓度污染因子,过分突出极大值对水质评价影响的相对不足。综合评定:改进的内梅罗指数模型对水质被污染程度的评价更为合理,客观。

Long-term monitoring had been carried out at the 23 groundwater sampling positions in Beihai City. Comprehensive water quality evaluation was conducted respectively by traditional Nemerow index method and improved Nemerow index method. The results out of two methods were compared, showing the improved method takes into account the difference and relative importance of various evaluation indexes and adopts weight factors, which makes up the shortcomings of traditional method, i.e. fully considering the maximum pollutant concentration factor and overemphasizing the effects of the maximum value on water quality evaluation. It is concluded that the improved Nemerow index model permits more reasonable and objective assessment of water pollution degree.