Cudgen Creek

Physical characteristics

Latitude (ºS)-28.26
Longitude (ºE)153.58
Catchment area (km2)168.6
Estuary area (km2)1,22.1
Estuary volume (ML)32371.0
Average depth (m)41.1
Roy et al. (2001) classification5V/11/A
Entrance condition6O/T
  1. Derived from DECCW (2010) NSW estuaries and coastal catchments spatial database.
  2. Includes area mapped as open water (see note 1), mangrove and saltmarsh areas (Creese R. G., Glasby T. M., West G. and Gallen C. (2009) Mapping the habitats of NSW estuaries. Industry & Investment NSW Fisheries Final Report Series 113. Port Stephens, NSW, Australia.
  3. Based on areas at 0.6 m AHD (Roper T., Creese B., Scanes P., Stephens K., Williams R., Dela-Cruz J., Coade G. and Coates B. (2011) Assessing the condition of estuaries and coastal lake ecosystems in NSW. Office of Environment and Heritage, Sydney).
  4. Estimated by dividing the total volume at 0.6 m AHD by the total surface area of the estuary including mangrove areas but excluding saltmarsh (Roper et al., 2011)
  5. Estuary group: I = oceanic embayment, II = tide dominated estuary, III = wave dominated estuary, IV = intermittently closed estuary V = freshwater bodies
    Estuary type: 1 = ocean embayments, 3 = drowned valley estuary, 5 = barrier estuary, 6 = barrier lagoon, 7 = interbarrier estuary, 8 = saline coastal lagoon, 9 = small coastal creeks, 11 = brackish barrier lake. Evolution stage: A=youthful, B=intermediate, C=semi-mature, D=mature.
    (P. S. Roy, R. J. Williams, A. R. Jones, I. Yassini, P. J. Gibbs, B. Coates, R. J. West, P. R. Scanes, J. P. Hudson and S. Nichol (2001) Structure and Function of South-east Australian Estuaries. Estuarine, Coastal and Shelf Science 53, 351-384)
  6. Entrance conditions: O = open, T = trained, I = intermittent.

Tidal prism

The volume of water moving past a fixed cross section during each flood tide or ebb tide (i.e. slack water to slack water), is referred to as the tidal prism of an estuary.

The following table shows the measured tidal prism at the location specified, along with the tidal range for near the measurement site and at Sydney Harbour.

Location:     500m upstream from the entrance on 14/10/93

Tide stateFlow
(106 m3
tidal range (m)
Sydney Harbour
tidal range (m)
Ebb flow0.81.241.46
Flood flow 0.791.251.52

Tidal survey

Tidal surveys measure the hydrodynamic behaviour of an estuary during a full tidal cycle. The parameters measured include velocity, water levels, salinity, temperature and pH.

The following tidal surveys have been undertaken on this estuary. A map shows the location and plots of the flows and water levels for the most comprehensive survey.

Copies of tidal survey reports are available from the Estuary Management Program

DateData collectedFigureReport
Oct 1993Current metering at three locations, tide levels at seven locations, water quality profiles and water quality data logger installed.1988-02.pdfMHL672
Dec 1992 to Nov 1993Cudgen Creek and Lake Water Quality Survey December.-MHL674

Hydrographic survey

The hydrographic survey provides the depth and physical characteristics of the estuary.

The metadata associated with the survey can be found on the map sheets provided.

Map sheet number DescriptionScale    Size
9533SH1.pdfCudgen Creek entrance1:1000384.9kb
9533SH2.pdfEntrance to Kingscliff (Bogangar Bridge)1:1000222.2kb
9616SH2.pdfEntrance & cross section locations1:4000169.7kb
9616SH3.pdfCross section locations1:4000169.4kb
9616SH4.pdfCudgen Lake1:400098.0kb
9616SH5.pdfCudgen Lake & cross section locations1:4000276.2kb
9616SH6.pdfCanal Development & cross section locations1:4000238.6kb
9616SH7.pdfCross sections - Cudgen Creek1:1000 H 1:200 V136.4kb
9616SH8.pdfCross sections - Cudgen Creek1:1000 H 1:200 V145.0kb
9616SH9.pdfCross sections - Cudgen Creek1:1000 H 1:200 V189.3kb
9616SH10.pdfCross sections - Cudgen Creek & Canal Development1:1000 H 1:200 V215.5kb
9616.txtCudgen Creek xyz dataN/A89.9kb
Page last updated: 26 April 2012