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Journal of Chemistry Volume 2018 ,2018-07-25
Atmospheric Nitrogen Deposition Associated with the Eutrophication of Taihu Lake
Research Article
Xi Chen 1 Yan-hua Wang 1 , 2 Chun Ye 3 Wei Zhou 4 Zu-cong Cai 1 , 2 Hao Yang 1 , 2 Xiao Han 5 , 6
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DOI:10.1155/2018/4017107
Received 2018-03-18, accepted for publication 2018-06-11, Published 2018-06-11
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摘要

Environmental effects of excessive amounts of atmospheric nitrogen (N) deposition have raised a great deal of attention. In the present study, the characteristics of N deposition and its contribution to water eutrophication were investigated in the Taihu Basin. The results showed that the annual average total deposition (TN), total wet deposition (TNW), and total dry deposition (TND) rates were 6154, 1142, and 5012 kg·km−2, respectively. Moreover, seasonal fluctuations in TN, TNW, and TND deposition were observed, with a higher N deposition rate occurring in spring and summer. Spatially, the distribution of TN and TND deposition throughout the Taihu Basin was similar. However, the TN deposition rate declined gradually from the southeast to the northwest, while the TNW deposition rate increased. A significant positive correlation was also found between the TN deposition contents with rainfall R=0.803,P=0.01, rainfall frequency R=0.767,P<0.01, and rainfall intensity R=0.659,P<0.05. The TN deposition concentration was significantly negatively correlated with rainfall R=−0.999,P<0.01, rain frequency R=−0.805,P<0.01, and rainfall intensity R=−0.783,P<0.01. The riverine input of TN was estimated to be 112,500 t·N·a−1, and the main N pollutants originated from domestic sewage (accounting for 48.88%) and agriculture (accounting for 28.17%). Livestock and aquaculture contributed 90% of the agricultural pollutants. Additionally, TN deposition contributed 14,400 t N·a−1 to the lake, which accounted for 12.36% of the annual riverine TN inputs. The TN deposition load already exceeds the eutrophication critical load in theory. Furthermore, the contribution of N deposition to the lake has been increasing in recent years, which may accelerate eutrophication of Taihu Lake.

授权许可

Copyright © 2018 Xi Chen et al. 2018
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

通讯作者

Yan-hua Wang.School of Geography Science, Nanjing Normal University, Nanjing 210023, China, njnu.edu.cn;Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China.wangyanhua@njnu.edu.cn

推荐引用方式

Xi Chen,Yan-hua Wang,Chun Ye,Wei Zhou,Zu-cong Cai,Hao Yang,Xiao Han. Atmospheric Nitrogen Deposition Associated with the Eutrophication of Taihu Lake. Journal of Chemistry ,Vol.2018(2018)

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