There are 14 major river catchments and many sub-catchments in South East Queensland. The largest is the Brisbane River catchment which flows directly into Moreton Bay. The combined catchment area of the creeks and rivers flowing into Moreton Bay is 21,220 km2.
Moreton Bay is recognised as a international Ramsar wetlands site for its waterway biodiversity with:
- one of Australia’s most extensive areas of seagrass, mangroves and saltmarsh
- a nursery ground for diverse fish and shellfish populations
- up to 50,000 migratory shorebirds of 34 species depend on the Bay for their survival
- 6 of the world’s 7 species of sea turtle
- over 600 dugongs live in Moreton Bay.
Moreton Bay is a relatively shallow body of water. It is separated from the ocean by sand islands with limited water flow through relatively narrow passages. Therefore the Bay behaves like a semi-enclosed lagoon accumulating sediment, nutrients and pollutants received from the catchments which drain into it.
Click on the map to look up the health of your local catchment.