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The input and output of nonpoint source nitrogen pollution in Miyun Reservoir and its buffering capacity
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Peng-hua ZHU1, Yun-qi WANG1, 2, *, Min LIU3, Zhuo-xun WANG1, Jun-jie LI1, Zhen WANG4, Xiao-ming ZHANG5, Peng LI6
China Environmental Science | 2025, 45(11) : 6218 - 6229
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China Environmental Science | 2025, 45(11): 6218-6229
• Environmental Ecology •
The input and output of nonpoint source nitrogen pollution in Miyun Reservoir and its buffering capacity
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Peng-hua ZHU1, Yun-qi WANG1, 2, *, Min LIU3, Zhuo-xun WANG1, Jun-jie LI1, Zhen WANG4, Xiao-ming ZHANG5, Peng LI6
Affiliations
  • 1.School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
  • 2.Jinyun Forest Ecosystem Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
  • 3.Southwest Power Design Institute Co., China Power Engineering Consultant Group, Chengdu 610056, China
  • 4.School of Soil and Water Conservation, Southwest Forestry University, Kunming 650224, China
  • 5.China Institute of Water Resources and Hydropower Research, Beijing 100048, China
  • 6.Faculty of Water Resources and Hydroelectric Engineering, Xi'an University of Technology, Xi'an 710048, China
Published: 2025-11-20
Outline
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As a core drinking water source in Beijing, the response mechanism of Total Nitrogen (TN) exceedance to Net Anthropogenic Nitrogen Input (NANI) in Miyun Reservoir is not clear. In this study, NANI was constructed based on multi-source data from 2007 to 2023 to systematically reveal the spatial and temporal dynamics of nitrogen input and its influence on TN output in the watershed. The results showed that the average NANI of Miyun Reservoir was 2768.80kg/(km2·a), with an overall decreasing trend year by year, and the high value of the input area was mainly distributed in the east, while the nitrogen input in the west was more stable; fertilizer application dominated the contribution structure of nitrogen input sources for a long period of time (67.32% of the peak value), and the contribution of the net nitrogen input from food was slowly decreasing; and the nitrogen buffer mechanism of the basin weakened the linear response of anthropogenic inputs to TN outputs. The linear response between anthropogenic inputs and TN outputs was weakened by the watershed nitrogen buffering mechanism, with the short-term bioretention capacity (SBI) enhanced by 57.90%, while the long-term buffering capacity (LBI) was reduced by 86.46% due to historical nitrogen accumulation, suggesting that saturated nitrogen retention may exacerbate the risk of water quality in the future. The study clarified the spatial and temporal patterns of nitrogen input and buffer lag effect in Miyun Reservoir, and provided scientific basis for nitrogen control strategy and dynamic early warning.

net anthropogenic nitrogen input  /  Miyun Reservoir  /  total nitrogen  /  buffering capacity  /  input sources  /  spatial and temporal distribution
祝鹏华, 王云琦, 刘敏, 王卓勋, 李俊杰, 王震, 张晓明, 李鹏. 密云水库非点源氮污染输入输出及其缓冲能力研究. 中国环境科学, 2025 , 45 (11) : 6218 -6229 .
Peng-hua ZHU, Yun-qi WANG, Min LIU, Zhuo-xun WANG, Jun-jie LI, Zhen WANG, Xiao-ming ZHANG, Peng LI. The input and output of nonpoint source nitrogen pollution in Miyun Reservoir and its buffering capacity[J]. China Environmental Science, 2025 , 45 (11) : 6218 -6229 .
Appendix
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Year 2025 volume 45 Issue 11
71
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Article Info
  • Receive Date：2025-03-31
  • Online Date：2026-10-08
  • Published：2025-11-20
Article Data
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History
  • Received：2025-03-31
Funding
Affiliations
    1.School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
    2.Jinyun Forest Ecosystem Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
    3.Southwest Power Design Institute Co., China Power Engineering Consultant Group, Chengdu 610056, China
    4.School of Soil and Water Conservation, Southwest Forestry University, Kunming 650224, China
    5.China Institute of Water Resources and Hydropower Research, Beijing 100048, China
    6.Faculty of Water Resources and Hydroelectric Engineering, Xi'an University of Technology, Xi'an 710048, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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