Conjola Lake

Physical characteristics

Latitude (ºS)-35.27
Longitude (ºE)150.51
Catchment area (km2)1139.1
Estuary area (km2)1,26.7
Estuary volume (ML)326798.7
Average depth (m)44.0
Roy et al. (2001) classification5III/5/B
Entrance condition6O/(I)
  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:     600m upstream of the entrance on 30/10/92

Tide stateFlow
(106 m3
tidal range (m)
Sydney Harbour
tidal range (m)
Ebb flow1.470.641.26
Flood flow 1.750.671.06

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 1992Current metering at three lines, ten tideboards, three current meters and two SDL deployed, temp/salinity at lines and other profiles throughout the estuary.-MHL637
Jun 2008 to Jun 2009Data collection: water levels at six sites; velocities at two sites; and water quality profiles at fourteen sites.1988-45.pdfMHL1929

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
9538SH1.pdfCross section locations1:10000289.6kb
9538SH2.pdfCross sections - Conjola Lake entrance1:1000 H 1:200 V104.4kb
9538SH3.pdfCross sections - Conjola Lake entrance channel - lower1:1000 H 1:200 V123.1kb
9538SH4.pdfCross sections - Conjola Lake mid entrance channel1:1000 H 1:200 V149.8kb
9538SH5.pdfCross sections - Conjola Lake upper entrance channel1:1000 H 1:200 V133.7kb
9538SH6.pdfCross sections - Conjola Lake lower basin1:1000 H 1:200 V120.5kb
9538SH7.pdfCross sections - Conjola Lake central basin1:1000 H 1:200 V77.8kb
9538SH8.pdfCross sections - Conjola Lake central basin1:1000 H 1:200 V74.3kb
9538SH9.pdfCross sections - Conjola Lake & Yooralla Bay1:1000 H 1:200 V100.2kb
9538SH10.pdfCross sections - Conjola Lake & Cundenarrah Bay1:1000 H 1:200 V89.2kb
9538SH11.pdfCross sections - Long Point1:1000 H 1:200 V92.2kb
9538SH12.pdfCross sections - Bangalow Bay to Mella Mella Bay1:1000 H 1:200 V92.1kb
9538SH13.pdfCross sections - Horse Point1:1000 H 1:200 V97.6kb
9538SH14.pdfCross sections - Kidgee Point1:1000 H 1:200 V104.2kb
9538SH15.pdfCross sections - Fishermans Paradise1:1000 H 1:200 V98.8kb
9538SH16.pdfCross sections - Fishermans Paradise & Berringer Lake1:1000 H 1:200 V129.2kb
9538SH17.pdfCross sections - Berringer Lake1:1000 H 1:200 V101.2kb
9538SH18.pdfCross sections - Berringer Lake1:1000 H 1:200 V97.0kb
9538SH19.pdfCross sections - Berringer Lake & Pattimore Lagoon1:1000 H 1:200 V113.2kb
9538.txtCross sections xyz dataN/A78.2kb
56414s01.pdfIndex plan, tidal planes & notes1:10000986.8kb
56414s02.pdfConjola Lake1:40001573.8kb
56414s03.pdfBerringer Lake1:2000525.9kb
56414s04.pdfConjola Lake1:2000836.9kb
56414s05.pdfConjola Lake entrance1:2000631.1kb
56414s06.pdfPattimore Lagoon1:2000316.9kb
56414s07.pdfConjola Creek & Bunnair Creek1:2000402.1kb
56414.txtBathymetry xyz dataN/A316.7kb
Page last updated: 26 April 2012