For individual water quality parameters, this table specifies upper thresholds for mapping various parameters. The fourth class contains all values exceeding "large". The individual symbols are defined in the program code.
| CODE | GIS_type | NAME | small | medium | large |
|---|---|---|---|---|---|
| 1 | Point | Rainfall Totals | 50 | 100 | 250 |
| 2 | Point | Flood Flow | 0.5 | 2 | 10 |
| 3 | Point | Basefow | 0.1 | 0.5 | 1 |
| 4 | Area | Water Production | 1 | 10 | 50 |
| 4 | Point | Water Production | 0.05 | 0.25 | 1 |
| 5 | Area | Irrigation Use | 2 | 20 | 100 |
| 5 | Point | Irrigation Use | 0.1 | 1 | 10 |
| 6 | Area | WW Flows | 1 | 5 | 25 |
| 6 | Point | WW Flows | 0.5 | 2.5 | 10 |
| 7 | Area | Irrigation Area | 1000 | 10000 | 50000 |
| 8 | Area | Irrigation Percentage | 5 | 20 | 50 |