【摘要】 对宝鸡市东沙河流域7个断面进行采样,分析污染因子特征,采用单因子评价法、综合污染指数法和改进的内梅罗指数法相结合,对东沙河水质进行综合评价。结果表明:七个断面流域主要污染物为COD,氨氮次之。东沙河流域磷、化学需氧量、氨氮浓度呈下降趋势,pH含量缓慢上升。河流域上游水质为Ⅲ类,中下游水质为Ⅴ类。河流上游污染因子为COD、主要污染物为工农业废水。中下游主要污染物为COD、氨氮。工业废水排放量是影响流域水质的主要原因。生活污水、固体废弃物以及农业废水溢流量对河流水质的变化也有重要作用。更多还原

【Abstract】 Seven sections of Dongsha River Basin in Baoji City were sampled to analyze the characteristics of pollution factors. The single factor evaluation method, comprehensive pollution index method and improved Nemero index method were combined to comprehensively evaluate the water quality of Dongsha River. The results showed that the main pollutants in the seven sections are COD, followed by ammonia nitrogen. Phosphorus, chemical oxygen demand and ammonia nitrogen concentration in the Dongsha River Basin showed a downward trend, and the pH increased slowly. The water quality in the upper reaches of the river basin is Class III, and the water quality in the middle and lower reaches is Class V. The upstream pollution factor of the river is COD, and the main pollutant is industrial and agricultural wastewater. The main pollutants in the middle and lower reaches are COD and ammonia nitrogen. Industrial wastewater discharge is the main reason affecting water quality in the basin. Domestic sewage, solid waste and agricultural wastewater overflows also play an important role in the change of river water quality.更多还原