城市河道水质评价与研究

摘要

结合内梅罗指数法的原理，考虑金属毒性的积累效应，引入污染因子权重值，将权重值最大的评价指标纳入计算，采用改进的内梅罗指数法评价城市河道的水质污染状况。并对水质的划分标准临界值进行计算，以此作为评价水质污染状况的依据。研究结果表明，两种方法具有明显的差异，改进的内梅罗指数法对水质污染状况的评价结果较传统内梅罗指数法的辨识度更高，能够综合客观全面地体现城市河道水质状况，与真实情况较好的吻合，更为客观、合理。%Using an improved Nemerow index method for urban river water quality evaluation , this study combined with the principle of Nemerow index method.The improved Nemerow index method considered the cumulative effect of metal toxicity , in-troduced the pollution factor weights and put the largest factor weight included in the calculation.It evaluates the status of water pollution according to the results of quality criteria for the classification threshold.The evaluation result showed significant differ-ence between Nemerow index method and improved Nemerow index method .The improved Nemerow index method has higher de-gree of recognition, which can reflect the comprehensive quality of urban river water objectively and comprehensively .The evalua-tion results were in good agreement with the real situation .So the improved Nemerow index method is objective and reasonable in evaluation of water pollution.