| 高月香,李想,高田田,张毅敏,陈婷,张志伟.同位素示踪解析北澄子河流域硝态氮污染贡献[J].农业环境科学学报,2022,41(10):2269-2276. |
| 同位素示踪解析北澄子河流域硝态氮污染贡献 |
| Isotopic tracer analysis of nitrate nitrogen pollution contribution in the Beichengzi River basin， China |
| 投稿时间：2022-03-02 修订日期：2022-05-16 |
| DOI：10.11654/jaes.2022-0205 |
| 中文关键词: 稳定同位素 IsoSource模型 硝态氮 贡献率 |
| 英文关键词: stable isotope IsoSource model nitrate nitrogen contribution rate |
| 基金项目:国家科技重大专项课题(2017ZX07202006);扬州市长江生态环境保护修复综合解决方案研究项目(CJZDGZYJ07) |
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| 中文摘要: |
| 北澄子河流域是国家南水北调东线工程治污规划区，为解决北澄子河国控断面水质不能稳定达标问题，保障南水北调水质安全，开展流域内硝态氮污染溯源分析。本研究针对水产养殖废水、生活污水、畜禽养殖废水以及农田种植排放源4种污染源，采用稳定同位素技术和IsoSource模型，利用NO3-/Cl-比值、同位素比值等方法，定量解析北澄子河流域硝态氮污染来源。从空间分布来看，北澄子河上游硝态氮污染主要来源于水产养殖，沿上游至下游水体硝态氮含量受生活污水的影响逐渐增加；从时间分布来看，丰水期硝态氮污染贡献率最高的是水产养殖源，为26.3%~73.6%，平水期主要是水产养殖源和生活污水源，其贡献率分别为18.8%~37.2%和26.0%~35.6%，枯水期各污染源贡献率持平。总体上，北澄子河流域水体硝态氮污染源贡献率最高的是生活污水源和水产养殖源，其次是畜禽养殖源，农田种植源贡献率最低。 |
| 英文摘要: |
| The Beichengzi River basin is the planned area for pollution control of the National South-to-North Water Diversion Project. Traceability analysis of nitrate nitrogen pollution in the basin was conducted to address the inability to stably maintain the standard of water quality in the state-controlled section of Beichengzi River, and to ensure the safety of water quality in the South-to-North Water Diversion Project. Based on the stable isotope technology and the IsoSource model, in this study, we used the NO3-/Cl- and isotope ratios to quantitatively analyze the Beichengzi River basin for four sources of nitrate nitrogen pollution： aquaculture wastewater, domestic sewage, livestock and poultry breeding wastewater, and farmland planting discharge sources. From the perspective of spatial distribution, the main source of nitrate nitrogen pollution in the upper reaches of the Beichengzi River originated from aquaculture, but the nitrate nitrogen content in the water body from upstream to downstream gradually increased owing to the influence of domestic sewage. From the perspective of time distribution, the highest pollution contribution rate, ranging from 26.3% to 73.6%, was from aquaculture in the highwater period. Aquaculture and domestic sewage were the main sources during the flat water period, and their contribution rates were 18.8%-37.2% and 26.0%-35.6%, respectively. In the drought period, the contribution rate of each pollution source was identical. Overall, in the Beichengzi River basin, the highest contribution rate of nitrate nitrogen pollution is from domestic sewage and aquaculture sources, followed by livestock and poultry breeding sources, with the lowest contribution rate is from farmland planting sources. |
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