Environmental issues

Water

Wallis Lake

Physical characteristics

Entrance
location
Latitude (ºS)-32.17
Longitude (ºE)152.51
Catchment area (km2)11196.9
Estuary area (km2)1,298.7
Estuary volume (ML)3217951.5
Average depth (m)42.3
Roy et al. (2001) classification5III/5/A
Entrance condition6O/T
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:     350m upstream from the entrance on 28/3/98

Tide stateFlow
(106 m3
Local
tidal range (m)
Sydney Harbour
tidal range (m)
Ebb flow13.81.411.69
Flood flow 16.61.341.66

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
Aug 1977Current metering at eight lines, five tideboards, velocities, discharge, cross sections, temp/salinity, suspended sediments and photographs.-MHL234
Feb 1978Current metering at seven lines over two days- velocities, nine tideboards, discharge, cross sections, temp/ salinity, bed samples and photographs.-MHL237
Nov 1980Current metering at four lines, tideboards at nine locations and temp/salinity.-MHL317
Jun 1989Current metering at seven lines with temp/salinity.-MHL569
Jun 1989Drogue tracking and sedimentology.-MHL569 MHL570
Mar 1998Extensive data collection: water levels at seventeen sites, velocities at fourteen sites, in situ water quality at four sites and water quality profiles at forty-one sites.1988-24a.pdf
1988-24b.pdf
1988-24c.pdf
MHL927

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
53665S1.pdfIndex plan1:30000532.2kb
53665S2.pdfIndex plan (1:1000 series)1:10000423.1kb
53665s3.pdfTidal planes1:50000677.3kb
53665s4.pdfLegends, notes & datum diagramN/A153.6kb
53665s5.pdfWallis Lake entrance & offshore1:1000423.5kb
53665s6.pdfWallamba River (Tuncurry)1:1000309.6kb
53665s7.pdfWallamba River (Tuncurry)1:1000181.0kb
53665s8.pdfCape Hawke Harbour1:1000527.8kb
53665s9.pdfMarcella Bay1:1000372.1kb
53665s10.pdfWallis Lake (Cut Island, Oaky Island & Long Island)1:1000401.7kb
53665s11.pdfOhmas Bay (Tern Island)1:1000484.2kb
53665s12.pdfWallis Lake (Miles Island)1:1000471.0kb
53665s13.pdfWallis Lake (Twin Islands & Mosquito Island)1:1000314.3kb
53665s14.pdfWallis Lake (Cockatoo Island)1:1000325.9kb
53665s15.pdfWallis Lake (Mather Island & Godwin Island)1:1000444.8kb
53665s16.pdfBreckenridge Channel (Leon Island & Godwin Island)1:1000381.2kb
53665s17.pdfWallis Lake (Wallis Island)1:1000228.9kb
53665s18.pdfBreckenridge Channel (Godwin Island)1:1000367.4kb
53665s19.pdfBreckenridge Channel (Hadleys Island)1:1000232.5kb
53665s20.pdfHells Gate1:1000278.5kb
53665s21.pdfWallis Lake (Tonys Point Island)1:1000178.6kb
53665s22.pdfPipers Creek1:1000157.6kb
53665s23.pdfWallis Lake (Dago Island)1:1000245.4kb
53665s24.pdfWallis Lake (Big Island)1:1000164.7kb
53665s25.pdfPipers Creek (Forster Keys)1:1000236.9kb
53665s26.pdfPipers Creek (Forster Keys & Big Island)1:1000242.9kb
53665s27.pdfPipers Creek (Forster Keys)1:1000214.4kb
53665S28.pdfWallamba River & Millers Mistake Creek1:2500278.1kb
53665S29.pdfWallamba River (Wallamba Island)1:2500389.4kb
53665S30.pdfWallingat River & Coolongolook River1:2500254.1kb
53665S31.pdfCoolongolook River & Minimba Creek1:2500239.1kb
53665S32.pdfMcClymonts Creek1:2500311.6kb
53665S33.pdfCoolongolook River1:2500276.4kb
53665S34.pdfWallis Lake (Regatta Island & Bandicoot Island)1:2500413.4kb
53665S35.pdfShallow Bay1:2500234.1kb
53665S36.pdfWallis Lake (Wallis Island)1:2500275.2kb
53665S37.pdfWallis Lake1:2500291.6kb
53665S38.pdfWallis Lake & Pipers Bay1:2500304.4kb
53665S39.pdfWallis Lake (Wallis Island & Yahoo Island)1:2500317.3kb
53665S40.pdfWallis Lake (Green Point)1:2500332.8kb
53665S41.pdfWallis Lake (Pelican Island)1:2500254.5kb
53665s42.pdfWallis Lake1:5000218.5kb
53665s43.pdfWallis Lake1:5000218.2kb
53665s44.pdfWallis Lake1:5000192.2kb
53665s45.pdfWallis Lake1:5000169.1kb
53665S46.pdfCross section locations - Wallamba River1:10000236.1kb
53665S47.pdfCross section locations - Coolongolook River1:10000259.8kb
53665S48.pdfCross section locations - Wallingat River1:10000224.9kb
53665S49.pdfCross sections - Wallamba River & West Channel1:1000 H 1:200 V178.1kb
53665S50.pdfCross sections - Wallamba River & Bungwahl Creek1:1000 H 1:200 V190.6kb
53665S51.pdfCross sections - Wallamba River1:1000 H 1:200 V175.1kb
53665S52.pdfCross sections - Wallamba River1:1000 H 1:200 V169.2kb
53665S53.pdfCross sections - Coolongolook River1:1000 H 1:200 V192.3kb
53665S54.pdfCross sections - Coolongolook River1:1000 H 1:200 V221.0kb
53665S55.pdfCross sections - Wang Wauk River1:1000 H 1:200 V194.9kb
53665S56.pdfCross sections - Wallingat River1:1000 H 1:200 V127.1kb
53665S57.pdfCross sections - Wallingat River1:1000 H 1:200 V107.1kb
53665S58.pdfCross sections - Wallingat River1:1000 H 1:200 V122.9kb
53665S59.pdfCross sections - Wallingat River1:1000 H 1:200 V144.4kb
53665S60.pdfCross sections - Wallingat River & Teatree Creek1:1000 H 1:200 V194.3kb
53665S61.pdfCross sections - Mills Island Channel, Sugar Creek & Ferny Creek1:1000 H 1:200 V133.4kb
53665.txtWallis Lake xyz dataN/A1398.3kb
Page last updated: 27 April 2012