Environmental issues

Water

Georges River

Physical characteristics

Entrance
location
Latitude (ºS)-34.00
Longitude (ºE)151.16
Catchment area (km2)1930.9
Estuary area (km2)1,226.6
Estuary volume (ML)3271393.5
Average depth (m)410.5
Roy et al. (2001) classification5II/3/B
Entrance condition6O
Notes:
  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:     100m upstream from the Captain Cook Bridge on 14/8/91

Tide stateFlow
(106 m3
Local
tidal range (m)
Sydney Harbour
tidal range (m)
Ebb flow19.321.211.12
Flood flow 16.661.351.32

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
May 1977Current metering at six lines, seven tideboards, bed and suspended samples and temp/salinity.-MHL219
Apr 1978Current metering at six lines, seven tideboards, discharge, cross sections, temp/salinity, bed and suspended samples and photographs.-MHL239
Apr 1979Current metering at five lines, six tideboards, temp/salinity, bed samples and suspended sediment samples.-MHL289
Mar 1983Flood metering from five bridges and nine tideboards, (minor flood).-MHL377
Nov 1984Current metering at Sylvania Waters canal estate at four lines, two tideboards, temp/salinity and dissolved oxygen.-MHL426
Nov 1985Current metering at one line on the Woronora River.-MHL447
Aug 1986Flood metering at four lines.-MHL472
Apr 1988Flood metering at three lines.-MHL553
Aug 1991Current metering at seven lines and eight tideboards. Current meters were deployed at three locations for a period of thirty-two days (also water quality data).1988-38.pdfMHL611

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
53496S1.pdfProfile comparison study information1:500 H 1:100 V391.2kb
53496S1b.pdfCross section locations1:25000733.4kb
53496S2.pdfProfile comparisons - Georges River (upstream Milperra Bridge)1:500 H 1:100 V189.3kb
53496S3.pdfProfile comparisons - Georges River (Georges Hall)1:500 H 1:100 V189.0kb
53496S4.pdfProfile comparisons - Georges River (Georges Hall)1:500 H 1:100 V183.4kb
53496S5.pdfProfile comparisons - Georges River (Georges Hall)1:500 H 1:100 V182.5kb
53496S6.pdfProfile comparisons - Georges River (Lansdowne)1:500 H 1:100 V186.9kb
53496S7.pdfProfile comparisons - Georges River (Dhurawal Bay)1:500 H 1:100 V124.0kb
53496S8.pdfProfile comparisons - Georges River (Dhurawal Bay)1:500 H 1:100 V130.2kb
53496S9.pdfProfile comparisons - Georges River (Dhurawal Bay)1:500 H 1:100 V88.8kb
53496S10.pdfProfile comparisons - Georges River (Floyd Bay)1:500 H 1:100 V164.3kb
53496S11.pdfProfile comparisons - Georges River (Floyd Bay)1:500 H 1:100 V128.2kb
53496S12.pdfProfile comparisons - Georges River (Floyd Bay)1:500 H 1:100 V163.4kb
53496S13.pdfProfile comparisons - Georges River (Chipping Norton Lake)1:500 H 1:100 V140.7kb
53496S14.pdfProfile comparisons - Georges River (Chipping Norton Lake)1:500 H 1:100 V154.2kb
53496S15.pdfProfile comparisons - Georges River (Chipping Norton Lake)1:500 H 1:100 V192.6kb
53496S16.pdfProfile comparisons - Georges River (Chipping Norton Lake)1:500 H 1:100 V162.4kb
53496S17.pdfProfile comparisons - Georges River (Chipping Norton Lake)1:500 H 1:100 V135.0kb
53496S18.pdfProfile comparisons - Georges River (Chipping Norton Lake)1:500 H 1:100 V159.6kb
53496S19.pdfProfile comparisons - Georges River (Chipping Norton)1:500 H 1:100 V178.2kb
53496S20.pdfProfile comparisons - Georges River (Chipping Norton Lake)1:500 H 1:100 V140.5kb
53496S21.pdfProfile comparisons - Georges River (Chipping Norton Lake)1:500 H 1:100 V138.7kb
53496S22.pdfProfile comparisons - Georges River (Chipping Norton Lake)1:500 H 1:100 V170.1kb
53496S23.pdfProfile comparisons - Georges River (downstream Governor Macquarie Drive)1:500 H 1:100 V170.3kb
53496S24.pdfProfile comparisons - Georges River (downstream Governor Macquarie Drive)1:500 H 1:100 V175.6kb
53496S25.pdfProfile comparisons - Georges River (upstream Governor Macquarie Drive)1:500 H 1:100 V172.4kb
53496S26.pdfProfile comparisons - Georges River (Warwick Farm)1:500 H 1:100 V171.6kb
53496S27.pdfProfile comparisons - Georges River (Lake Moore)1:500 H 1:100 V178.7kb
53496S28.pdfProfile comparisons - Georges River (Lake Moore)1:500 H 1:100 V144.3kb
53496S29.pdfProfile comparisons - Georges River (Lake Moore)1:500 H 1:100 V123.6kb
53496S30.pdfProfile comparisons - Georges River (Lake Moore)1:500 H 1:100 V147.7kb
53496S31.pdfProfile comparisons - Georges River (Lake Moore)1:500 H 1:100 V147.0kb
53496S32.pdfProfile comparisons - Georges River (upstream Lake Moore)1:500 H 1:100 V174.4kb
53496S33.pdfProfile comparisons - Georges River (Liverpool)1:500 H 1:100 V174.2kb
53496S34.pdfProfile comparisons - Georges River (downstream Liverpool Weir)1:500 H 1:100 V175.6kb
53496S35.pdfProfile comparisons - Georges River (downstream Liverpool Weir & Lake Moore)1:500 H 1:100 V118.7kb
53496.txtSurvey 10 (1997) xyz data - see location sheet for metadataN/A225.3kb
53809S01.pdfCross section locations - Como Rail Bridge to Towra Point1:10000388.9kb
53809S02.pdfCross sections - Goerges River (Towra Point to Sans Souci)1:2000 H 1:200 V306.1kb
53809S03.pdfCross sections - Georges River (Shipwrights Bay to Carina Bay)1:2000 H 1:200 V370.5kb
53809S04.pdfCross sections - Woolaware Bay1:2000 H 1:200 V214.2kb
53809S05.pdfCross sections - Woolaware Bay, Gwawley Bay, Shipwrights Bay, Kyle Bay, Oatley Bay and Carina Bay1:2000 H 1:200 V321.8kb
53809.txtCross sections xyz dataN/A92.2kb
Page last updated: 26 April 2012