陕西省渭河流域水质变化分析研究

针对陕西省渭河流域水质变化问题,采集该流域内2010年-2016年7个监测断面的水质数据,采用综合污染指数法对水质主要污染指标化学需氧量、氨氮的变化特征进行分析,分析结果表明选取的各断面6年间综合污染指数值总体呈下降趋势,最少的下降56.7％,最多的甚至下降90.6％,且渭河陕西干流断面水质明显优于支流断面水质.说明陕西省渭河流域水质逐年好转.最后根据水质监测与分析结果,给出水质污染状况变化的可能原因,并提出了一些水污染治理建议措施.

Analysis on Water Quality Change inWeihe River Basin of Shaanxi Province

According to the change of water quality in Weihe River Basin of Shaanxi Province based on water quality data of seven monitoring sections between 2010 and 2016, the variations of the main pollution indexes of COD, NH3-N were analyzed by the method of comprehensive pollution index.The analysis results show that the comprehensive pollution index talked on a downward trend during the 6 years, descended at least 56.7％ and at most 90.6％, and the water qualityof main stream section was much better than the subordinate stream section.The water quality of Weihe basin in Shaanxi province was improving year by year.Finally, according to the results of water quality analysis, the possible causes of the change of water quality pollution status are given, and suggestions for pollution control are given.