CHENAi-ting,WANGPei-jing,YUYan,et al.Characteristics of Nitrogen and Phosphorus Wet Deposition in Rainfall Events in Beijing[J].China Water & Wastewater,2022,38(13):132-138.
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Characteristics of Nitrogen and Phosphorus Wet Deposition in Rainfall Events in Beijing

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第38卷 Number: 第13期 Page: 132-138 Column: Date of publication: 2022-07-01
Author(s):
CHEN　Ai-ting1; 2;  WANG　Pei-jing2;  YU　Yan1;  ZHAN Nan2;  YU Lei2;  WANG　Xin3;  MA　Ning2;  MENG　Qing-yi2;  LI　Qi-jun2
（1. School of Chemical & Environmental Engineering， China University of Mining and Technology-Beijing， Beijing 100083， China； 2. Beijing Key Laboratory of Water Environmental and Ecological Technology for River Basins， Beijing Water Science and Technology Institute， Beijing 100048， China； 3. Beijing Administration Office of Miyun Reservoir， Beijing 101512， China）
Keywords:
rainfall event;  nitrogen;  phosphorus;  wet deposition
Abstract:
To identify the effect of atmospheric wet deposition on urban water environment, five atmospheric wet deposition sampling sites were set up in Beijing: Lianshi Lake Park (A), Shahe Gate (B), Beiguan Gate (C), Huairou Reservoir (D) and Miyun Reservoir (E), and monitored for four months during the wet season in 2020. Based on the monitoring data, the concentrations of TN, NH4+-N, NO3--N and TP and their variation law in rainfall with intensity more than 20 mm were analyzed. The concentration of nitrogen in hard rain was higher than that in heavy rain. The atmospheric wet deposition flux of each index was positively correlated with rainfall, and R2 was 0.923 6, 0.916 7, 0.591 7 and 0.844 1, respectively. In terms of spatial distribution, the TN average concentration in rainfall events at five stations were 5.39 mg/L, 4.70 mg/L, 3.86 mg/L, 3.35 mg/L and 3.18 mg/L, respectively, and its descending order was A, B, C, D and E. In addition, the proportion of NO3--N to inorganic nitrogen in rainfall had a descending order of A, B, C, D and E, indicating that the pollution in urban area was more serious than that in suburban area. The concentrations of TN, NH4+-N and NO3--N in rainfall events at the five stations showed a decreasing trend during the process of a rainstorm. Compared with the nitrogen concentration in the previous hour, nitrogen concentration usually decreased when the rainfall in the next hour was more than 5 mm. However, nitrogen concentration mostly increased when the rainfall was less than 2 mm in the next hour, and the increase was as high as 63%.
Last Update: 2022-07-01