| Variable | Model Identification | Model Structure | AIC | |
| AR (p) | MA (q) | |||
| Intake_WS | ARIMA (1, 0, 0) | 0.901 | 0.000 | 978.996 |
| Intake_DS | ARIMA (1, 0, 0) | 0.904 | 0.000 | 1017.932 |
| Offtake_WS | ARIMA (1, 0, 0) | 0.879 | 0.000 | 733.653 |
| Offtake_DS | ARIMA (1, 0, 0) | 0.897 | 0.000 | 633.478 |