Research Article
Human Activities Increase the Nitrogen in Surface Water on the Eastern Loess Plateau
Table 3
The variations of the nitrogen concentrations in Yellow River and Fen River Basins during January to December in 2019.
| Nitrogen (mg/L) | Month |
| NH3-N | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Yellow River | 4.26 | 3.66 | 2.64 | 1.75 | 2.11 | 1.50 | 1.58 | 0.53 | 0.54 | 0.72 | 0.92 | 2.05 | Fen River | 10.41 | 8.99 | 5.56 | 4.78 | 5.85 | 3.51 | 0.95 | 2.10 | 1.78 | 1.45 | 3.34 | 2.42 | Eastern Loess Plateau | 8.76 | 7.67 | 4.74 | 3.79 | 4.62 | 2.92 | 1.40 | 1.55 | 1.31 | 1.26 | 2.45 | 2.62 | TN | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Yellow River | 12.30 | 12.54 | 9.07 | 12.68 | 10.67 | 10.56 | 10.66 | 7.35 | 9.72 | 9.82 | 10.09 | 10.01 | Fen River | 21.96 | 23.67 | 15.23 | 20.51 | 14.40 | 14.91 | 15.62 | 13.58 | 15.85 | 16.63 | 19.44 | 18.07 | Eastern Loess Plateau | 20.03 | 21.49 | 13.85 | 18.89 | 14.05 | 14.42 | 14.70 | 11.84 | 14.37 | 15.04 | 16.71 | 16.14 |
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