Urban rivers as hotspots of regional nitrogen pollution.
Urban rivers as hotspots of regional nitrogen pollution.
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DOI：
10.1016/j.envpol.2015.05.031
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发表时间：
2015-10
影响因子：
8.9
通讯作者：
Xiaohong Zhang;Yiyun Wu;Baojing Gu
中科院分区：
文献类型：
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作者：
Xiaohong Zhang;Yiyun Wu;Baojing Gu
通过人类活动向陆地生态系统输入的过量氮已在区域尺度上恶化了水质。然而，城市地区作为全球一半以上人口的居住地，在区域水污染分析中通常不被考虑。本文利用杭州市72个月的水质监测数据，探讨了城市河流在区域氮污染中的作用以及人类活动对河流氮污染的影响。城市河流氨氮浓度比区域河流高3-5倍。城市河流已成为活性氮的储存库和区域污染热点。此外，目前的地表水监测网络并没有测量这条河流的污染，而这些监测网络是为了测量更广泛的区域模式而设计的，因此低估了区域污染。这不仅对中国的城市环境至关重要，而且对其他城市河流污染严重的国家也至关重要。
Excess nitrogen inputs to terrestrial ecosystems via human activities have deteriorated water qualities on regional scales. Urban areas as settlements of over half global population, however, were usually not considered in the analysis of regional water pollution. Here, we used a 72-month monitoring data of water qualities in Hangzhou, China to test the role of urban rives in regional nitrogen pollution and how they response to the changes of human activities. Concentrations of ammonium nitrogen in urban rivers were 3–5 times higher than that in regional rivers. Urban rivers have become pools of reactive nitrogen and hotspots of regional pollution. Moreover, this river pollution is not being measured by current surface water monitoring networks that are designed to measure broader regional patterns, resulting in an underestimation of regional pollution. This is crucial to urban environment not only in China, but also in other countries, where urban rivers are seriously polluted.