湘江流域地表水自动监测与手工监测环境质量评价对比

Comparison of surface water quality assessment between automatic monitoring and manual monitoring in Xiangjiang River Basin

选取衡阳市湘江流域9个国控地表水监测断面2018年的监测数据,从月度、年度水环境质量评价结果进行对比分析,考察水质自动监测与手工监测方法的一致性。结果表明:采用两种监测方式的水质类别一致性比例为67.6%,不一致的月份主要相差1个水质类别,月度环境质量评价得到的Ⅰ~Ⅲ类水质比例相差极小,仅为0.9或1.9个百分点。2种监测方式的年度环境质量评价结果(水质类别、水质状况)完全一致。对于水质状况为优或良好的河流地表水,可以逐步建立以自动监测为主、手工监测为辅的监测模式。

Based on the monitoring data of 2018 from nine state-controlled surface water monitoring sections in Xiangjiang River Basin of Hengyang City,the consistency of the results by methods of water quality automatic monitoring and manual monitoring were compared and analyzed,with the results of water environmental quality evaluation in each month and year.The results showed that the consistency ratio of water quality categories evaluated by the twomethods was 67.6%.The month with inconsistent water quality categories was mainly one water quality category,and the proportion of water quality categories I-III evaluated by monthly environmental quality was small,with only 0.9%or 1.9%difference.The results of annual environmental quality assessment of the two methods,including water quality category and water quality status,were identical.For the surface water of rivers with excellent or good water quality,a monitoring mode with automatic monitoring as the main and manual monitoring as the supplement could be gradually established.