通过对历年来运河水中亚硝酸盐氮的监测资料统计，分析了亚硝酸盐氮的污染变化规律及其与有机污染的关系，为运河水环境质量预报进行了先期准备工作。 Based on the statistics of monitoring data of nitrite nitrogen in canals over the years, the changing rules of nitrite nitrogen pollution and its relationship with organic pollution were analyzed, and the preparatory work was carried out for the prediction of canal water environment quality.