| Land cover class | 2003 | 2005 | 2008 | |||
| Area(ha) | % | Area(ha) | % | Area(ha) | % | |
| S. alterniflora | 1664.1 | 23.9 | 1888.6 | 27.2 | 2142.6 | 30.8 |
| Sparse S. glauca | 2241.0 | 32.2 | 1912.7 | 27.5 | 1727.3 | 24.8 |
| Dense S. glauca | 1107.5 | 15.9 | 1871.7 | 26.9 | 1835.6 | 26.4 |
| P. australis | 629.2 | 9.1 | 698.6 | 10.0 | 926.5 | 13.3 |
| Unvegetated marsh | 894.7 | 12.9 | 305.6 | 4.4 | 189.9 | 2.7 |
| Tidal channels and river | 191.2 | 2.8 | 143.5 | 2.1 | 109.0 | 1.6 |
| Intertidal mudflats | 223.2 | 3.2 | 130.4 | 1.9 | 0.0 | 0.0 |
| Road | 0.00 | 0.0 | 0.00 | 0.0 | 19.7 | 0.3 |
| Total | 6951.1 | 100.0 | 6951.1 | 100.0 | 6951.1 | 100.0 |