We gather data on the physical properties of estuaries so that we can monitor, evaluate and report on the health of our estuary systems. We classify estuaries by:
- region – Northern Rivers, Hunter-Central Rivers, Sydney Metropolitan, Southern Rivers
- estuary group – oceanic embayment, tide dominated estuary, wave dominated estuary, intermittently closed estuary, freshwater body
- estuary type – ocean embayment, drowned valley estuary, barrier estuary, barrier lagoon, interbarrier estuary, saline coastal lagoon, small coastal creeks, brackish barrier lake
- entrance condition – open or closed to the sea, intermittent, trained.