| Variable | BB sub-catchment | MK sub-catchment |
| Area (km2) | 3.754 | 1.478 |
| Width (m) | 1033.00 | 506.25 |
| Slope (%) | 3.61 | 3.55 |
| Impervious area (%) | 35.67 | 32.00 |
| N of impervious area | 0.01 | 0.01 |
| N of pervious area | 0.31 | 0.24 |
| Impervious depression storage (mm) | 0.52 | 0.23 |
| Pervious depression storage (mm) | 1.73 | 2.07 |