摘要
为了解2021年北高干渠水质状况,对水质自动监测和手工监测进行比对分析,其测量误差满足技术规范要求,表明自动监测数据准确可信;选择自动监测数据对2021年北高干渠水质进行分析和评价,结果显示,浊度>200 NTU时,浊度与总磷、高锰酸盐指数、氨氮和总氮的皮尔逊(Pearson)相关系数分别为0.918,0.868,0.971,0.935,水质自动监测结果受浊度干扰显著;浊度≤200 NTU时,北高干渠单因子污染指数年均值总磷(0.433)>高锰酸盐指数(0.314)>氨氮(0.154)>pH(0.138),满足Ⅲ类水质要求;5—10月溶解氧偏低,主要受水温升高、夏秋季的低气压和阴雨天的低氧分压影响.
In order to understand the water quality of Beigao main canal in 2021,the water quality automatic monitoring was compared with manual monitoring,the measurement errors between them meet the requiremenspecifications,indicating that the automatic monitoring data were accurate and credible.The water quality of Beigao main canal in 2021 wereanalyzed and evaluated by using the automatic monitoring data,the results showed that:when turbidity>200 NTU,the Pearson correlation coefficients between turbidity and total phosphorus,permanganate index,ammonia nitrogen and total nitrogen were 0.918,0.868,0.971 and 0.935,respectively,indicating that turseriously rffects the accuracyof automatic water quality monitoring;when turbidity≤200 NTU,the annual single-factor contaminant index of Beigao main canal was total phosphorus(0.433)>permanganate index(0.314)>ammonia nitrogen(0.154)>pH(0.138),reaching ClassⅢwater quality;the dissolved oxygen concentration wafrom May to October,which was mainly rfected by the rise of water temperature,the low air pressure in autumn and the low partial pressure of oxygen in rainy days.
出处
《环境保护与循环经济》
2022年第7期80-83,共4页
environmental protection and circular economy
