Research Article
Research on Danjiang Water Quality Prediction Based on Improved Artificial Bee Colony Algorithm and Optimized BP Neural Network
Table 2
Water quality content grades and classification standards.
| Taxon description | Class 1 | Class 2 | Class 3 | Class 4 | Class 5 |
| NH3–N/mg • L−1 | 0–0.15 | 0.15–0.50 | 0.5–1.0 | 1.0–1.5 | 1.5–2.0 | DO/mg • L−1 | 7.5–6.0 | 6.0–5.0 | 5.0–4.0 | 4.0–2.0 | 2.0–0 | COD/mg • L−1 | 0–10 | 10–15 | 15–20 | 20–30 | 30–40 | IMn/mg • L−1 | 0–2.0 | 2.0–4.0 | 4.0–6.0 | 6.0–10 | 10–15 | Total phosphorus/mg • L−1 | 0–0.02 | 0.02–0.10 | 0.10–0.20 | 0.20–0.30 | 0.30–0.40 | Total nitrogen/mg • L−1 | 0–0.20 | 0.20–0.50 | 0.50–1.0 | 1.0–1.5 | 1.5–2.0 |
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