Burrill Lake

Physical characteristics

Latitude (ºS)-35.40
Longitude (ºE)150.45
Catchment area (km2)160.7
Estuary area (km2)1,24.4
Estuary volume (ML)317652.7
Average depth (m)44.3
Roy et al. (2001) classification5III/5/A
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:     10m upstream from Princes Highway bridge on 13/3/01

Tide stateFlow
(106 m3
tidal range (m)
Sydney Harbour
tidal range (m)
Ebb flow0.390.541.22
Flood flow 0.30.491.24

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
Sep 1991Coast and Estuaries gauging - tideboards at eleven sites and velocity data from in situ SEADATA 626.-PWD92100
Mar 2001Extensive data collection: water levels at five sites, velocities at one site, water quality profiles at ten sites and some algal data.1988-47.pdfMHL1106

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
8879SH1.pdfBurrill Lake entrance channel (upper)1:1000193.1kb
8879SH2.pdfBurrill Lake entrance channel (upper)1:1000181.9kb
8879SH3.pdfBurrill Lake entrance channel (mid)1:1000174.5kb
8879SH4.pdfBurrill Lake entrance channel (lower)1:1000189.5kb
8879SH5.pdfBurrill Lake entrance1:1000100.0kb
8879SH6.pdfIndex plan1:4000214.8kb
8879.txtBurrill Lake xyz dataN/A40.7kb
54330sh1.pdfIndex plan & cross section locations1:100001444.8kb
54330sh2.pdfBurrill Lake entrance channel (upper)1:10001115.8kb
54330sh3.pdfBurrill Lake entrance channel (mid)1:10001140.3kb
54330sh4.pdfBurrill Lake entrance1:10001394.7kb
54330sh5.pdfBurrill Lake & Stoney Creek1:25002062.9kb
54330sh6.pdfBurrill Lake western basin1:25002468.3kb
54330sh7.pdfCross sections - Stoney Creek1:1000 H 1:200 V441.8kb
54330.txtBurrill Lake xyz dataN/A350.8kb
Page last updated: 26 April 2012