【摘要】 松花江流域是中国氮污染较为严重的流域之一,为了解松花江流域丰水期水体中氮素的主要来源,研究选取36个典型断面进行采样,测定氮氧稳定同位素,解析水体中氮污染的主要来源。结果表明:利用δ¹⁵N-NO₃和δ¹⁸O-NO₃的值范围分别为2.07‰～14.24‰、-3.99‰～8.03‰,主要来源于含氮肥料、土壤有机氮输入、生活和粪肥污水,根据Iso source模型计算得到三类污染源的平均贡献率分别为27%,41%和32%。丰水期松花江流域需要进一步加强对含氮化肥和城市点源污水排放的管控,需重点关注干流哈尔滨段及支流伊通河-饮马河流域氮污染情况,提高预警能力和监管力度。更多还原

【Abstract】 The Songhua River Basin（SHR） is one of the basins with serious nitrogen pollution in China. In order to understand the main sources of nitrogen in the water of SHR in high flow season, 36 typical sections were sampled to determine stable isotopes of nitrogen and oxygen, and the main sources of nitrogen pollution in the water were analyzed. The results show that values of δ¹⁵N-NO₃ and δ¹⁸O-NO₃ range from 2.07‰～14.24‰ and-3.99‰～8.03‰, respectively. They are mainly derived from nitrogen fertilizer, soil organic nitrogen input, domestic sewage and manure. According to the Iso Source model, the average contribution rates of the three sources of pollution are 27%, 41% and 32%, respectively. It is necessary to further strengthen the control of nitrogen fertilizer and urban point source sewage discharge in the SHR during the high flow season, and pay attention to the nitrogen pollution in the Harbin section of the main stream and its tributaries in the Yitong River-Yinma River basin, so as to improve the early-warning ability and supervision.更多还原