Estuary type: Drowned valley
|Catchment area (km2)
|Estuary area (km2)
|Estuary volume (ML)
|Average depth (m)
Tidal exchange volume
Tidal exchange volume or tidal prism data is available for this estuary. This tidal prism was measured in 1978.
Notes: km2 = square kilometres; m = metres; m3 = cubic metres; ML = megalitres.
tidal range (m)
Water depth and survey data
Bathymetric and coastal topography data for this estuary are available in our data portal.
The Port Hacking catchment is relatively undisturbed. The lower estuary dissects a catchment which has the protected bushland of the Royal National Park to the south and the southern edge of Sydney’s suburban sprawl – the Sutherland Shire – to the north. Over 80% of this catchment is undisturbed forest.