| Catchment | Rainfall (mm) | Peak runoff (CMS) | Change in peak runoff | |||
| NBS Scenario 1 | NBS Scenario 2 | NBS Scenario 3 | NBS Scenario 4 | |||
| Subarea 1 | 10.69 | 0.82 | −6.3% | −47.7% | −31.4% | −15.5% |
| Subarea 2 | 10.69 | 0.68 | −6.5% | −47.7% | −31.3% | −15.5% |
| Subarea 3 | 10.69 | 5.76 | −6.1% | −52.1% | −36.2% | −20.5% |
| Subarea 4 | 10.69 | 4.59 | −6.1% | −49.4% | −32.8% | −16.4% |
| Subarea 5 | 10.69 | 2.78 | −6.1% | −49.7% | −33.1% | −16.5% |
| Subarea 6 | 10.69 | 1.58 | −9.3% | −49.6% | −33.0% | −16.5% |
| System area | 10.69 | 6.65 | −4.2% | −41.9% | −27.8% | −13.8% |