|
| Reach | Criterion layer (weight) | Indicator layer | Evaluation criterion | Current value |
| Excellent | Good | Moderate | Poor | Sick |
|
| LW | Water quality (0.25) | COD (mg/L) | 15.00 | 20.00 | 30.00 | 40.00 | 50.00 | 19.16 |
| NH3-N (mg/L) | 0.15 | 0.50 | 1.00 | 1.50 | 2.00 | 0.69 |
| Ecological function (0.59) | Ratio of wetland area (%) | 5.00 | 4.00 | 3.00 | 2.00 | 1.00 | 1.24 |
| Riparian vegetation coverage ratio (%) | 90.00 | 70.00 | 50.00 | 30.00 | 10.00 | 59.89 |
| Guaranteed rate of discharge in dry flow season (%) | 80.00 | 60.00 | 40.00 | 20.00 | 0.00 | 44.00 |
| Recreation function (0.16) | Recreation value index | 90.00 | 70.00 | 50.00 | 30.00 | 10.00 | 40.00 |
|
| WX | Water quality (0.32) | COD (mg/L) | 15.00 | 20.00 | 30.00 | 40.00 | 50.00 | 53.77 |
| NH3-N (mg/L) | 0.15 | 0.50 | 1.00 | 1.50 | 2.00 | 8.57 |
| Ecological function (0.34) | Riparian vegetation coverage ratio (%) | 90.00 | 70.00 | 50.00 | 30.00 | 10.00 | 60.97 |
| Proportion of fish species (%) | 0.80 | 0.60 | 0.40 | 0.20 | 0.00 | 0.35 |
| Guaranteed rate of discharge in dry flow season (%) | 80.00 | 60.00 | 40.00 | 20.00 | 0.00 | 40.00 |
| Recreation function (0.34) | Recreation value index | 90.00 | 70.00 | 50.00 | 30.00 | 10.00 | 36.00 |
|
| XL | Water quality (0.34) | COD (mg/L) | 15.00 | 20.00 | 30.00 | 40.00 | 50.00 | 49.60 |
| NH3-N (mg/L) | 0.15 | 0.50 | 1.00 | 1.50 | 2.00 | 7.25 |
| Ecological function (0.14) | Ratio of wetland area (%) | 5.00 | 4.00 | 3.00 | 2.00 | 1.00 | 8.90 |
| Riparian vegetation coverage ratio (%) | 90.00 | 70.00 | 50.00 | 30.00 | 10.00 | 60.43 |
| Guaranteed rate of discharge in dry flow season (%) | 90.00 | 70.00 | 50.00 | 30.00 | 10.00 | 51.85 |
| Flood control (0.52) | Variation rate of streambed gradient (%) | 100.00 | 90.00 | 80.00 | 60.00 | 40.00 | 87.00 |
| Capacity of flood discharge (%) | 95.00 | 85.00 | 75.00 | 60.00 | 40.00 | 54.60 |
|
| LH | Water quality (0.20) | COD (mg/L) | 15.00 | 20.00 | 30.00 | 40.00 | 50.00 | 41.46 |
| NH3-N (mg/L) | 0.15 | 0.50 | 1.00 | 1.50 | 2.00 | 6.01 |
| Ecological function (0.37) | Riparian vegetation coverage ratio (%) | 90.00 | 70.00 | 50.00 | 30.00 | 10.00 | 65.08 |
| Guaranteed rate of discharge in dry flow season (%) | 90.00 | 70.00 | 50.00 | 30.00 | 10.00 | 61.00 |
| Flood control (0.43) | Variation rate of streambed gradient (%) | 100.00 | 90.00 | 80.00 | 60.00 | 40.00 | 44.00 |
| Requirement rate of bankfull discharge (%) | 100.00 | 80.00 | 60.00 | 40.00 | 20.00 | 39.00 |
|
| DH | Water quality (0.16) | COD (mg/L) | 15.00 | 20.00 | 30.00 | 40.00 | 50.00 | 37.26 |
| NH3-N (mg/L) | 0.15 | 0.50 | 1.00 | 1.50 | 2.00 | 5.46 |
| Ecological function (0.30) | Ratio of wetland area (%) | 5.00 | 4.00 | 3.00 | 2.00 | 1.00 | 1.64 |
| Guaranteed rate of discharge in dry flow season (%) | 80.00 | 60.00 | 40.00 | 20.00 | 0.00 | 37.50 |
| Flood control (0.54) | Variation rate of streambed gradient (%) | 100.00 | 90.00 | 80.00 | 70.00 | 60.00 | 71.00 |
| Requirement rate of bankfull discharge (%) | 100.00 | 80.00 | 60.00 | 40.00 | 20.00 | 62.50 |
|
